THERAGENICS CORP
8-K, 1997-01-13
PHARMACEUTICAL PREPARATIONS
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K




                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934




       Date of Report (Date of Earliest Event Reported): January 13, 1997
                                                        (December 9, 1996)


                             THERAGENICS CORPORATION
             (Exact Name of Registrant as Specified in its Charter)


                                    Delaware
                            (State of Incorporation)


           0-15443                                   58-1528626
   (Commission File Number)             (I.R.S. Employer Identification No.)


5325 Oakbrook Parkway, Norcross, Georgia                      30093
(Address of Principal Executive Offices)                    (Zip Code)


                                 (404) 381-8338
              (Registrant's Telephone Number, Including Area Code)

<PAGE>


Item 2. Acquisition or Disposition of Assets

Theragenics Agrees to Purchase of Four Additional Cyclotrons

     Theragenics Corporation  ("Theragenics" or the "Company") entered into four
agreements  ("Agreements") dated December 27, 1996, each for the purchase of one
cyclotron from Ion Beam  Applications  s.a., the  manufacturer  of  Theragenics'
current four cyclotrons  ("Manufacturer").  The  Agreements,  which are attached
hereto as Exhibits  10.23 (a),  (b), (c) and (d), call for the  Manufacturer  to
install and turn over to Theragenics  one cyclotron in the late first quarter of
1998, a second  cyclotron in the late second quarter of 1998, a third  cyclotron
in the late third  quarter  of 1998 and a fourth  cyclotron  in the late  fourth
quarter of 1998. All four  agreements are payable to the  Manufacturer in Begian
Francs.

     The purchase of these four  cyclotrons  will be part of a larger  expansion
project which will combine at one location the Company's  cyclotron and assembly
facilities  that are now in separate  cities.  Also  included in this  expansion
project  will  be  administrative  offices  for  the  Company's  executives  and
management  staff.  The cost of this  expansion  including  the cost of the four
cyclotrons and the facilities to house them and the assembly and  administrative
facilities is currently expected to total approximately $20,000,000,  based upon
today's exchange rate of U.S. dollars to the Manufacturer's country's currency.

     Theragenics  currently  plans to  finance  this  expansion  project  from a
combination of current cash  balances,  cash flow from future  operations,  bank
credit  facilities  and  additional  funds from  future debt  financings,  stock
offerings or other forms of financing for this project.

Item 5. Other Events

Theragenics Secures $11 Million Credit Facility

     Theragenics  Corporation  ("Theragenics")  in an agreement with NationsBank
dated December 9, 1996,  secured a Revolving  Credit  Facility (the  "Facility")
totaling  $11,000,000,  which is  attached  hereto as Exhibit  10.24.  Under the
Facility,  $11,000,000 became immediately available to Theragenics upon signing.
Provisions of the Facility limit the amount of annual capital expenditures,  the
incurrence of additional debt and requires,  among other things, the maintenance
of certain minimum  financial  ratios.  The Facility replaces a previous Line of
Credit  Facility and  Revolving  Credit  Facility  totaling  $5,000,000  and the
approximate  $1,000,000 balance of a $2,100,000 term loan with NationsBank which
has been in place since  September 1994.  Management  plans to use proceeds from
the Facility to help finance the Company's  growth and partially  fund expansion
involving the addition of a fifth,  sixth,  seventh and eighth cyclotron and new
manufacturing and administrative facilitiesas described in Item 2 above.

<PAGE>


Item 7. Exhibits

Exhibit Number          Description

   10.23(a)             Purchase Agreement dated December 27, 1996 between
                        Theragenics Corporation and Ion Beam Applications s.a.
   10.23(b)             Purchase Agreement dated December 27, 1996 between
                        Theragenics Corporation and Ion Beam Applications s.a.
   10.23(c)             Purchase Agreement dated December 27, 1996 between
                        Theragenics Corporation and Ion Beam Applications s.a.
   10.23(d)             Purchase Agreement dated December 27, 1996 between
                        Theragenics Corporation and Ion Beam Applications s.a.
   10.24                Second Amended and Restated Loan and Security
                        Agreement by and between Theragenics Corporation and
                        NationsBank, N.A. (South), Dated as of December 9, 1996





                                    SIGNATURE

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized. THERAGENICS CORPORATION




                                           /s/ Bruce W. Smith
                                          Bruce W. Smith
                                          Secretary, Treasurer and
                                          Chief Financial Officer

Dated: January 10, 1996


                                EXHIBIT 10.23(a)

                               Purchase Agreement
                                     between
                             Theragenics Corporation
                                       and
                           Ion Beam Applications s.a.
                                      dated
                                December 27, 1996


   Confidential  portions of this  document  have been blanked out and have been
         filed separately with the Securities and Exchange Commission.

<PAGE>









                               Purchase Agreement

                                     between

                          Theragenics Corporation Inc.

                                       and

                           Ion Beam Applications S.A.

                                       for
                         _____________Cyclotron Number 5

                                       and

                            Related Target Equipment








<PAGE>


                                Table of Contents
Purchase Agreement
1.  Interpretation............................................................3
2.  Subject Matter of Sale....................................................4
3.  Purchase Price of the Supplies............................................5
4.  Title and Risk of Loss....................................................7
5.  Delivery..................................................................7
6.  Installation of Supplies..................................................7
7.  Preparatory Work..........................................................9
8.  Acceptance...............................................................11
9.  Transportation and Insurance.............................................13
10. Export Documents, Duties and Foreign Taxes...............................14
11. Customs Duties, Buyer's Country Taxes and Import Permits.................14
12. Warranty As To Title.....................................................14
13. Design and Performance Warranty..........................................15
14. Material and Workmanship Warranty........................................15
15. Logging of Operations....................................................16
16. Training.................................................................16
17. Disclaimer of Liability for Personal Injury..............................16
18. Liability for Consequential Damages......................................17
19. Infringement of Proprietary Rights.......................................17
20. Seller's and Buyer's Proprietary Information.............................19
21. Destruction of Supplies..................................................20
22. Excusable Delay..........................................................20
23. Termination for Insolvency...............................................21
24. Spare Parts..............................................................21
25. Technical Assistance by the Seller.......................................21
26. Entire Agreement.........................................................22
27. Authorization............................................................22
28. Effective Date...........................................................22
29. Disputes.................................................................23
30. Governing Laws...........................................................23
31. Notices..................................................................23
32. Project Coordinator......................................................24
33. Assignment...............................................................25
34. Headings.................................................................25
35. Severability.............................................................25
36. Non-Waiver...............................................................25

Appendices
Cyclotron Parameters
- -------------------
Building Requirements
Building Completion Specifications
Included Spare Parts
Acceptance Criteria
Acceptance Tests
Accelerated Delivery and Acceptance Option




<PAGE>


                               Purchase Agreement


AGREEMENT  made as of this 27th day of  December  1996 by and  between  ION BEAM
APPLICATIONS,  S.A., a corporation  organized under the laws of Belgium,  having
its principal  office at Chemin du Cyclotron 3, 1348  Louvain-la-Neuve,  Belgium
(hereinafter  called the "Seller",  which expression includes its successors and
permitted assignees) and THERAGENICS CORPORATION, having its principal office at
5325 Oakbrook  Parkway,  Norcross,  Georgia 30093, USA  (hereinafter  called the
"Buyer", which expression includes its successors and permitted assignees).

WITNESSETH :

WHEREAS, the Seller wishes to sell to the Buyer and the Buyer wishes to buy from
the   Seller,    the   Seller's    model    ___________    cyclotron,    related
____________ equipment  and  spare  parts  therefore,  all as more  particularly
described herein : and

WHEREAS,  the Buyer wishes the Seller to assemble,  install,  start up, test and
make  operational  the  ________________  cyclotron  to be  purchased  including
related equipment and the Seller is willing to undertake this task : and

NOW, THEREFORE,  in consideration of the mutual covenants herein contained,  the
parties hereto agree as follows :

1. Interpretation

In this Agreement, unless the contrary intention appears :

"Acceptance" means the process whereby the Seller demonstrates to the Buyer that
the Supplies provided meet the requirements of the Agreement. This process shall
consist of a series of tests,  the  "Acceptance  Tests" as  defined in  Appendix
"Acceptance   Tests",   which  demonstrate  the  Supplies  meet  the  guaranteed
specifications, the Acceptance Criteria.

<PAGE>


"Acceptance  Criteria"  mean the  guaranteed  specifications  of the Supplies as
defined in Appendix "Acceptance Criteria".

"Acceptance  Date"  means the date on which the Buyer  agrees  that based on the
Acceptance  Tests, the Supplies have met the Acceptance  Criteria . The Supplies
shall be deemed  accepted  when the Buyer and Seller  agree in writing  that the
Acceptance Tests have been successfully completed.

"Acceptance Tests" are the tests listed in Appendix "Acceptance Tests".

"Agreement" means this document and includes its Appendices.

"Buyer's Country" means the country where the Site is located.

"Day" means calendar day;  "Week" means  calendar  week;  "Month" means calendar
month.

When the last day of any period  prescribed  for the execution of any assignment
falls on a day which is not a working day in Belgium or in the Buyer's  Country,
the  assignment  may be  performed  on  the  first  working  day  following  the
aforementioned day.

"Effective Date" has the meaning set forth in Section entitled "Effective Date".

"Excusable  Delay"  has the  meaning  set forth in Section  entitled  "Excusable
Delay".

"Site" means the Buyer's facility in Buford, Georgia, USA.

"Supplies" means all equipment,  hardware, software (including installation) and
the  associated  documentation,  support  equipment  and services to be provided
under the Agreement, as detailed in Appendix "Cyclotron Parameters" and Appendix
"___________________________".



<PAGE>



2. Subject Matter of Sale

Subject to the terms and conditions of this Agreement :

a) The Seller  shall sell and deliver to the Buyer and the Buyer shall  purchase
from  the  Seller  (i)  a   ______________________   cyclotron,   the  technical
specifications  of which are more fully  described  in the  Appendix  "Cyclotron
Parameters" Appendix hereto; ii) _______________________________,  the technical
specifications   of   which   are  more   fully   described   in  the   Appendix
"__________________________  " hereto;  and (iii) a set of spare parts listed in
the Appendix "Included Spare Parts" hereto;

b) The Seller shall also assemble, install, start up, test, make operational and
perform the Acceptance Tests on the Supplies.

c) The  Seller  shall  send one of his  specialists  to assist in  bringing  the
cyclotron to full  operational  capacity after Acceptance of the Supplies by the
Buyer, as described in Section 25.

d) The Buyer and  Seller  agree  that an option  for  accelerated  delivery  and
acceptance as described in Appendix "Accelerated Delivery and Acceptance Option"
may be  exercised  by the Buyer.  In case that option is exercised by the Buyer,
the covenants of the "Accelerated Delivery and Acceptance Option" Appendix shall
be applicable to both parties.


3. Purchase Price of the Supplies

a) The  aggregate  purchase  price  (hereinafter  the "Price") of the  Supplies,
including  packaging,  insurance and transportation of the Supplies to the Site,
the  assembly,  testing and start up of the  Supplies  described  in the Section
entitled      "Subject      Matter     of     Sale"     above,      shall     be
_______________________________________________________________.    This   price
shall also  include  the  technical  assistance  by the Seller as  described  in
Section 25, the Spare Parts as listed in Appendix "Included Spare Parts" and the
Seller's contribution to the applicable USA customs duty as stated in Section 11
of this Agreement.

b) As a down payment  equivalent to _____________  has been made by the Buyer to
the Seller on November 6, 1996, the balance of the Price set forth in subsection
a) shall be payable as follows:


<PAGE>


     i) _____________________________________________________________________ to
be paid to the Seller upon execution of this Agreement;

     ii)  ___________________________________________________________ to be paid
to the  Seller  on  March 1,  1997.  This  payment  shall  be  guaranteed  by an
irrevocable  standby  letter of credit to be issued in favor of and  approved by
the Seller within one month from the Effective Date.

     iii)   ____________________________________________________________  to  be
paid to the Seller on July 1,  1997.  This  payment  shall be  guaranteed  by an
irrevocable  standby  letter of credit to be issued in favor of and  approved by
the Seller by March 1, 1997.

     iv)  ___________________________________________________________ to be paid
to the Seller  within 15 days from  shipment  of the  Supplies as  evidenced  by
receipt of the  shipping  documents  and no later than  December  1, 1997 if the
shipment is delayed by Buyer's  fault.  This payment  shall be  guaranteed by an
irrevocable  standby  Letter of Credit to be issued in favor of and  approved by
the Seller by the date of shipping of the Supplies,  to be notified by Seller to
the Buyer at least 30 days in advance.

     v)  _________________________________________________________ to be paid to
the Seller within 15 days of the Acceptance of the Supplies.  This payment shall
be guaranteed by an  irrevocable  stand-by  Letter of Credit,  which can only be
exercised  during  the  year  following  the  delivery  of  the  Supplies,   and
conditioned  only  upon  successful  completion  of  the  Acceptance  Tests  and
providing  further  that,  in the event the Seller is  prevented  by the Buyer's
fault,  by a delay  on the  part of the  Buyer,  or by a  regulatory  body  with
jurisdiction over the Buyer from completing the Acceptance Tests for a period of
sixty (60) days or more,  payment  thereunder  to the Seller  shall be made upon
demand of the  Seller.  This  Letter  of Credit  shall be issued in favor of and
approved by the Seller,  such approval not to be unreasonably  withheld,  by the
date of  shipping  of the  Supplies,  to be notified by Seller to Buyer at least
thirty days in advance.

c) All  payments  by the Buyer to the Seller  under this  Agreement  shall be in
Belgian Francs and,  except those  specified in paragraph 3. b) above,  shall be
made by wire transfer within thirty (30) days from the date of invoice.


<PAGE>


d) All  payments  by the Buyer to the Seller will be deemed to have been made by
the Buyer on the date on which  the  Seller  has been  credited  for the  proper
amounts.  Any payment due to the Seller  which is not paid on the due date shall
accrue  interest for each started  month of delay at an annual rate of one point
above  the rate of the  "Avance  en Compte  Courant  Hors  Plafond  de la Banque
Nationale de Belgique" as published in "l'Echo" on the first day of such month.


4. Title and Risk of Loss

Except as indicated  below in this  paragraph,  title to the  Supplies  shall be
transferred  from the Seller to the Buyer when and to the  extent  payments  are
received by the Seller.  The Buyer  represents  and  warrants  that it shall not
cause or permit to be caused  any lien or  encumbrance  of any kind to be placed
upon the  Supplies  to an  extent  greater  than its share of  ownership  in the
Supplies.  It is  understood  that if the  Seller is unable to  demonstrate  the
Supplies  meet  the  Acceptance  Criteria  within  one year of  delivery  of the
Supplies to the Buyer's Site, clear title to the Supplies transfers to the Buyer
without  obligation to pay to the Seller the final payment  specified in Section
3.b.v unless the Seller has been prevented from conducting the Acceptance  Tests
as described in Section 8, last paragraph.

Risk of loss of any part of the Supplies shall pass from the Seller to the Buyer
upon delivery of such parts to the Site.


5. Delivery

The  Seller  shall  deliver  the  Supplies  to the Buyer at the Site and set the
Supplies in their final location.


6. Installation of Supplies

a) The assembly and  installation of the Supplies at the Site and the Acceptance
Tests are  planned to be  completed  by  ________________________________  after
completion  of  Site  preparation  by  the  Buyer  at  the  Seller's  reasonable
satisfaction  as  evidenced  by  an  acceptance  document  of  the  Site  ("Site
Acceptance  Document")  signed by the  Seller,  whichever  is later.  The Seller
undertakes to make its best efforts to complete the installation and testing

<PAGE>


within this period.  During the  installation  period the Buyer shall permit the
Seller's  employees,  subcontractors  or  agents  unlimited  access  to the Site
provided said  individuals  comply with policies and procedures  established for
the Buyer's employees regarding such matters as health and safety issues.

b)  With  reasonable  notice  to  the  Seller,  the  Buyer  and  its  authorized
representatives  shall,  during reasonable working hours, be free to inspect the
quality and  conditions of the Supplies at the Seller's site during  fabrication
and at any time upon arrival of the same at the Site and during the installation
period.  The Seller will notify in writing to the Buyer when the major materials
are  available  for  construction  of the  cyclotron.  c) The  Buyer at its sole
expense shall provide the Seller with closed  premises on or reasonably near the
Site in which the Seller may store  employee  clothing  and tools and  equipment
required for the installation.  However, the Buyer does not assume any risk with
respect to the loss or theft of any such items while on the Buyer's premises.

d) The Buyer shall,  at its sole expense,  provide the Seller with the following
utilities  required for installation of the Supplies and Acceptance Tests on the
Supplies:  electricity,  water,  compressed  air,  dry  nitrogen for venting the
vacuum  chamber,  hydrogen  gas for the ion  source,  as  described  in Appendix
"Building Requirements".  Access to telephone and fax equipment connected to the
international network is required and the Seller will pay the charges associated
with the use of this line.  The Buyer shall provide all the necessary  radiation
measuring  equipment  required for the operation and the Acceptance Tests on the
Supplies.

e) Within  fifteen  (15) days from the date of delivery of the  cyclotron at the
Site, the Buyer shall permit the Seller to produce beams at full energy and full
intensity in the cyclotron vault.

f) The Price  reflects labor  provided by the Seller.  Any  additional  labor or
costs  required by local labor codes,  etc.  will be the  responsibility  of the
Buyer.

g) The Supplies are manufactured  according to Belgian technical  standards.  If
the Buyer requires compliance of the Supplies with specific technical standards,
these  technical  standards  must be notified by the Buyer to the Seller  within
seven weeks of the Effective Date. All additional costs related to

<PAGE>


making  the  Supplies  conform to those  norms or  specific  standards  shall be
charged to the Buyer.

7. Preparatory Work

a) The Buyer shall have the sole  responsibility,  at its sole expense,  for the
work required to prepare the Site for installation of the Supplies. The building
to house the Supplies and the systems  contained  therein  shall comply with the
specifications   detailed  in  Appendix  "Building  Requirements"  and  Appendix
"Building Completion Specifications". As soon as possible after completion, and,
at the latest,  on  _________________,  the Seller shall prepare for the Buyer a
proposed  layout and prepare such other plans and  memoranda as are necessary to
transmit data to the Buyer's  architects and engineers.  By  _____________,  the
Buyer shall furnish to the Seller  drawings and plans for the Site including the
building and systems detailed in Appendix  "Building  Requirements" and Appendix
"Building  Completion  Specifications" in sufficient detail to enable the Seller
to judge  whether the Site will be  satisfactory  for the Supplies and will meet
the  specifications  detailed in Appendix  "Building  Requirements" and Appendix
"Building  Completion  Specifications".  Within four (4) weeks of the receipt of
this initial set of architectural and engineering drawings and plans, the Seller
shall provide the Buyer with  comments  thereon and detailed  information  as to
such modifications therein as the Seller deems necessary including such drawings
and  technical  documents  as may be  required  by the  Buyer  to  complete  the
installation of the cables,  cooling water and compressed air systems.  However,
the time devoted to preparation by personnel of Seller of additional  layouts or
drawings  and/or  reviews  of  revised  sets of  architectural  and  engineering
drawings will be invoiced at Seller's  regular rates. No additional  charge will
be made for telephone  consultations.  Travel and related expenses incurred as a
result of attendance by personnel of the Seller  required at meeting  outside of
Belgium   with   the   Buyer's   architects,   engineers,   consultants   and/or
representatives  will be reimbursed by the Buyer. With respect to the foregoing,
the  responsibility  for  determining  whether  conflict  exists  between  local
building  codes and/or other laws or government  regulations  and the content of
drawings,  data sheets,  memoranda or other forms of communication  submitted by
the Seller is solely the responsibility of the Buyer, his architects,  engineers
and/or  consultants.  The  definitive  drawings and plans for the Site,  made in
accordance  with  the  Seller's  comments  and  recommendations,  will  then  be
furnished  by the  Buyer to the  Seller  by  ___________.  In  addition,  unless
otherwise specified, the Buyer shall have the sole responsibility for the design
and construction of the radiation monitoring systems, of the shielding

<PAGE>


required to prevent  radiation leakage and of the systems required to handle the
disposal of radioactive waste.

Any delay on the part of the Seller in meeting its  obligations  related to this
Section  by more  than ten (10)  days  will add a number  of days to the  period
provided for the  performance  by the Buyer equal to the number of days of delay
by the Seller.

b) Before  commencing  installation,  the Seller shall  inspect the Site and the
Buyer shall  submit to the Seller the Site  Acceptance  Document to be signed by
the Seller confirming that the preparatory work meets all the criteria set forth
in the Section entitled  "Installation of Supplies",  paragraph c) and d) and in
Appendix   "Building    Requirements"   and   Appendix   "Building    Completion
Specifications".   This   acceptance   document  only   indicates  the  Seller's
willingness to begin the  installation of the Supplies in the Buyer's  building.
It  does  not  discharge  the  Buyer  and  his  subcontractors  of any of  their
responsibilities   regarding  the  building.   The  Buyer  shall   complete  the
preparatory  work at the Site by  _______________.  If the  preparatory  work as
regards the cyclotron  vault is  substantially  completed  before that date, the
Buyer shall  accept  delivery  and/or  installation  of the  Supplies as soon as
possible under the applicable laws and regulations.  In the event that such work
has not been completed before that date, or if for any other reason the Buyer is
unable to accept delivery of the Supplies or  commencement  of the  installation
thereof by that date, the Buyer shall immediately give the Seller written notice
of this fact and the  anticipated  new date for  completion  of the  preparatory
work. In any case, the Seller may ship the Supplies to the Buyer at any time and
the  Buyer  shall  store  them  in one of its  warehouses  until  the  date  the
preparatory work is completed.

c) One week before  commencing  installation and setting of the cyclotron in its
vault,  the Buyer shall allow the Seller  full  access to the  cyclotron  vault,
power supplies and control room and all other rooms related to the  installation
of the Supplies to allow for the measurement of line-up marks to be performed.

d) The Buyer's completion,  to the reasonable satisfaction of the Seller, of its
undertakings  in this  section  and  elsewhere  in this  Agreement  relating  to
preparation of the Site and the continuous  furnishing of necessary services and
permits set forth in the Section entitled "Installation of Supplies",  paragraph
c), d) and e) and in Section entitled "Custom Duties,  Buyer's Country Taxes and
Import Permits" and the requirements detailed in Appendix "Building

<PAGE>


Requirements"  and  Appendix  "Building  Completion  Specifications"  shall be a
condition precedent to the Seller's commitment to perform within the time period
specified under the Section entitled  "Installation of Supplies" hereof, and any
delay or  interruption  by the  Buyer in  meeting  its  obligations  under  this
Agreement in a timely  fashion  shall extend the Seller's  time to perform under
this  Agreement  including  but not  limited to Seller's  time to  exercise  and
perform under the option for  accelerated  delivery and  acceptance  outlined in
Appendix  "Accelerated Delivery and Acceptance Option", by a period equal to the
period of the Buyer's delay or interruption plus, if shipment and/or delivery is
delayed by Buyer's  fault or at Buyer's  request,  an  additional  period not to
exceed four weeks to reschedule  shipment and/or delivery of the Supplies and/or
personnel as may be required.

In the event of any such delay or  interruption,  the Buyer will  reimburse  the
Seller for any  reasonable  costs  incurred as a direct  result of such delay or
interruption.  Additionally,  if such  postponement or  interruption  delays the
Buyer's  obligation  to make any of the payments  set forth in Section  entitled
"Purchase Price of the Supplies", paragraph b) hereof, interest will be computed
for each  started  month of delay at an annual  rate one point above the rate of
the "Avance en Compte  Courant Hors Plafond de la Banque  Nationale de Belgique"
as published in "l'Echo" on the first day of such month.

If all the  conditions  necessary  for the  Seller  to sign the Site  Acceptance
Document  referred  to in the  above  Section  have  not been met at the time of
delivery of the Supplies,  the Seller will  nonetheless make its best efforts to
start the  installation  of the Supplies as soon as reasonably  possible and the
Buyer will give the Seller any reasonable  support to allow the Seller to do so.
However,  beginning of installation of the Supplies in the building,  under such
conditions,  will under no circumstances be considered as implicit acceptance of
the Site by the Seller.


8. Acceptance

On the date set by the Seller for the conduct of the  Acceptance  Tests,  and in
the presence of the Buyer's  representatives,  the Seller shall begin to conduct
the agreed-upon Acceptance Tests.

Not more than twenty four (24) hours following the completion of such tests, the
Buyer shall either accept the Supplies as conforming to the requirements of the

<PAGE>


Agreement  by  issuing  an  acceptance  certificate   "Acceptance   Certificate"
acknowledging  that  decision,  or advise the Seller in writing of the extent to
which the Supplies do not meet the requirements of the Agreement.

The Buyer shall not withhold the issue of the Acceptance  Certificate on account
of minor omissions or defects in the Supplies which do not substantially  affect
their use but may designate in the Acceptance  Certificate such minors omissions
or defects. The Seller shall promptly make good these omissions or defects.

If the Buyer does not give notice within the period  stipulated above, or begins
using the  Supplies for its own use,  such tests shall be deemed  satisfactorily
completed,  the Acceptance  Certificate  shall be deemed issued on that date and
the related  acceptance  payment shall be paid to the Seller within 15 days from
that date.

If  the  Buyer   gives  the  Seller   notice  that  such  tests  have  not  been
satisfactorily  completed,  the  Seller  shall  make  such  adjustments  as  are
necessary  and  repeat  the   Acceptance   Tests  until  the  Buyer  deems  them
satisfactory pursuant to the terms set out above.

Until ___________,  the Seller  shall have  unimpeded  access to the Supplies to
complete the Acceptance Tests. If the Seller is unable to successfully  complete
the Acceptance Tests by  _____________,  the Buyer shall be free to begin use of
the  Supplies  forty five (45) days later.  Should the  Supplies be put into use
under this  condition,  it is  understood  the Buyer and Seller will make a good
faith effort to facilitate  the completion of the  Acceptance  Tests,  but it is
further  understood that the Buyer's production of Pd-103 with the machine takes
precedence.  The Buyer agrees to allow the Seller three (3) prescheduled days of
unimpeded access to the Supplies per month during the period between ___________
until the period for acceptance has expired as specified in Section 4 "Title and
Risk of Loss".

If a dispute  arises  between  the Buyer and the Seller  concerning  whether the
Acceptance Tests have been successfully  completed or concerning the issuance of
the  Acceptance  Certificate,  the Buyer and the Seller  will  jointly  agree to
obtain the services of the American Arbitration Association ("AAA") to arbitrate
the dispute,  as described in Section 29  hereafter.  Both parties will abide by
AAA's recommendations.


<PAGE>


If the Seller is prevented  either by the Buyer or by any  regulatory  body that
has juridiction over the Buyer from conducting the Acceptance Tests for a period
of sixty (60) days,  the Buyer  shall be deemed to have  accepted  the  Supplies
sixty  (60) days  after the  Seller  was first  prevented  from  conducting  the
Acceptance  Tests. If the Seller is prevented by force majeure or events similar
to  those  enumerated  under  Section  "Excusable  Delay"  from  conducting  the
Acceptance  Tests, the Buyer shall pay 50% of the Acceptance  payment as defined
in Section 3 b) v). In either  case the Seller  shall  complete  the  Acceptance
Tests within the period remaining at the time the impediment began.


9. Transportation and Insurance

Seller shall at its own expense :

i) Obtain appropriate  property and liability  insurance covering loss or damage
to the Supplies  and  injuries to  individuals  during the  construction  of the
Supplies and during the  transportation  of the Supplies from the Seller's plant
to the Site.

ii) Pay all freight and other transportation charges associated with delivery of
the Supplies to the Site, and have a representative  present during the transfer
of the Supplies from the port of entry to the Site.

iii) Maintain worker's compensation insurance during the assembly,  installation
and testing of the  Supplies,  as  required  by  applicable  law,  covering  its
employees  and,  upon request  from Buyer,  provide a  certificate  of insurance
evidencing such coverage.

Buyer shall at its own expense:

i) Obtain appropriate  property and liability  insurance covering loss or damage
to the Supplies  between  delivery of the Supplies at the Site and the time when
the  Seller  has  been  paid in full  for the  amounts  under  Section  entitled
"Purchase Price of the Supplies". In such insurance policies, both the Buyer and
the Seller shall be named as insured parties.

ii) Arrange for the  destruction,  pick-up  and/or  clearing  away of all waste,
including the Supplies  packaging  except for the disposal of radioactive  waste
which is covered in section 12 of appendix "Building Completion Specifications".

<PAGE>


The Buyer and the Seller  shall each take out and  maintain at their own expense
during the period from receipt of the  Supplies at the Site through  Acceptance,
insurance to provide  coverage for both itself and the other party for an amount
of at least one million US dollars  (US$  1,000,000)  per  accident  against any
direct and indirect liability for bodily injury and death to individuals and all
direct or  indirect  costs,  losses  and  damages to the  property  of the other
arising  out of  each  other's  acts  or  omissions  in  unloading,  assembling,
installing and testing of the Supplies.


10. Export Documents, Duties and Foreign Taxes

The Seller will be  responsible  for obtaining all necessary  export  permits or
licences  relating  to the  Supplies  and the Buyer will  offer such  reasonable
assistance  in this regard as the Seller may  request.  The Seller shall pay any
and all export  duties and all other taxes  required  to be paid  outside of the
Buyer's Country in connection with the sale of the Supplies.


11. Customs Duties, Buyer's Country Taxes and Import Permits

The Buyer  shall pay all sales,  use,  gross  receipts,  excise and other  taxes
assessed  or levied by the  Buyer's  Country or any other  taxing  jurisdiction,
state or local,  within the Buyer's  Country,  against the Buyer  (including any
fines, penalties and interests thereof) as a result of or in connection with the
sale, use, delivery, storage or transfer of the Supplies.

The Seller agrees to equally share with the Buyer the cost of the import customs
duties levied by the customs authorities of the USA at the entry of the Supplies
into the USA, up to a maximum  cost for the Seller  equal to two percent (2%) of
the price of the Supplies.

The Buyer shall be responsible  for obtaining all necessary  permits or licences
with respect to the  importation of the Supplies in the Buyer's  Country and the
installation  and use of the Supplies at the Site, and the Seller will offer the
Buyer such reasonable assistance in this regard as the Buyer may request.


12.  Warranty As To Title

The Seller warrants good title to the Supplies.



<PAGE>



13. Design and Performance Warranty

The Seller hereby  warrants  that the Supplies  will perform in accordance  with
applicable  design  and  performance   specifications   set  forth  in  Appendix
"Cyclotron Parameters" and in Appendix "__________________________" for a period
of one (1) year after the  Acceptance  Date. The Seller shall resolve any design
flaws appearing during the first year following the Acceptance of the Supplies.


14. Material and Workmanship Warranty

The  Seller  hereby  warrants  that the  Supplies  will be free from  defects in
material  and  workmanship  for a  period  of one  (1)  year  from  the  date of
acceptance of the Supplies by the Buyer or fifteen (15) months from the date the
Supplies are put in their final  location in the Buyer's vault if the Acceptance
Date is delayed at the Buyer's  request or through the Buyer's fault,  whichever
period is shorter: provided,  however, that this warranty shall not apply to ion
source stamped cathodes and chimneys,  puller electrodes,  air filters, targets,
oil for the vacuum  pumps,  demineralizing  column,  gas bottles (H2 for the ion
source, N2 for  venting,...),  and other  consumables;  that the Seller makes no
warranty with respect to failures notified after the warranty period or failures
during operation without logging or failures due to alteration, misapplications,
abuse, abnormal conditions of temperature,  dirt, corrosive matter,  maintenance
not  carried  out  according  to the  Seller's  instructions,  lack  of  trained
personnel for maintenance,  operation above rated capacities either  intentional
or otherwise,  or in an otherwise  improper  manner or physical damage caused by
persons  other than  employees or agents of the Seller;  that the Seller's  sole
liability  under valid  warranty  regarding  claims for defects in material  and
workmanship is limited, at the option of the Seller, to repair or replacement of
the defective parts; that with respect to components purchased by the Seller for
incorporation into the Supplies  essentially  without  modification,  the Seller
makes no  warranties  of its own but  assigns  to the  Buyer  the full  warranty
extended to the Seller as part of the original purchase of the component.

If, due to a fault of the Seller,  the Supplies  have not passed the  Acceptance
Tests by _____________, the Seller's warranty shall start and be in effect until
 _________________.


<PAGE>


The Seller  shall  bear the cost and risk of loss  during  transport  of (i) any
defective  part or components  being  returned to the Seller's  factory with the
Seller's  agreement and (ii) any repaired or replacement  item being returned to
the Buyer.  Products or parts returned without the agreement of the Seller shall
be at the Buyer's  sole risk and expense.  The Seller  shall bear any  personnel
costs incurred in connection  with the  fulfillment of the Seller's  obligations
under this warranty.

The foregoing warranties are exclusive and are given and accepted in lieu of all
other warranties of quality written or oral,  express or implied,  and all other
warranties are hereby disclaimed.


15. Logging of Operations

The Buyer shall keep a logbook of operation  for the  Supplies.  In this logbook
shall be  documented  all  sessions of  operation of the Supplies as well as any
problems  encountered  during  operation of the Supplies.  If the Buyer requests
assistance  from the Seller in  resolving a problem  with the  Supplies  and the
information in the log is relevant to this resolution, the Buyer may at its sole
discretion  make the log available to the Seller . If the Buyer presents a claim
against the  warranty  provided  by the  Seller,  a copy of the log must be made
available to the Seller.  It is  understood  by the Seller that the  information
contained in the Log may be of a proprietary  nature and is therefore covered by
the confidentiality agreement between the parties.


16. Training

The Seller agrees to provide up to two days of training in  _________ operation,
preventative  maintenance and repair to the Buyers' personnel at the Site during
or immediately after the installation  period, with the exact dates and times to
be mutually  agreed by the Buyer and Seller.  The cost of such training shall be
the responsibility of the Seller.


17. Disclaimer of Liability for Personal Injury

The Seller and the Buyer hereby acknowledge that the products,  as offered,  are
highly sophisticated devices which should be operated only by trained personnel;
that it is the Buyer's sole obligation to retain and train such personnel or

<PAGE>


have it trained,  possibly by the Seller;  that, where  necessary,  the Supplies
contain  interlocking  devices  designed to prevent their  operation in a manner
which  would  cause  injury  to such  personnel,  but as in the  case  with  all
equipment  utilizing  high  voltages,  such  personnel  should  assume  that the
interlocking  devices are  inoperative and should take  appropriate  measures to
ensure that the voltage  has been turned off prior to begin  working  where high
voltage is present during the start up and/or operation of the Supplies; that it
is inherent in the  operation of the  Supplies  that  portions  thereof may emit
dangerous  ionizing  radiation  and may become  activated  during  their  normal
operation;  that it is the Buyer's sole  obligation  to  determine  the level of
radioactivity,  to ensure that a system exists for determining and recording the
levels of  radioactivity  and to ensure that no personnel  or other  persons are
exposed to radiation in excess of that permitted by relevant law or regulations.

Based upon the  foregoing  acknowledgments,  it is,  therefore,  agreed that the
Seller shall not incur any  liability  for personal  injury to any party arising
out of the operations and  maintenance of the Supplies  unless such liability is
solely  caused by a gross  negligence  on the part of the Seller in the  design,
implementation  or  documentation  including but not limited to maintenance  and
operation manuals for the Supplies. In order to give effect to these limitations
of the Seller's liability, and as an express condition of sale, the Buyer hereby
agrees to indemnify and hold the Seller  harmless  from any and all claims,  but
limited by the  exclusion  of  negligent  acts or  omissions  as outlined in the
preceding sentence, damages and liability, including reasonable attorney's fees,
arising  out of a claim  against the Seller for  personal  injuries of any party
occasioned by the operation and/or maintenance of such Supplies.


18. Liability for Consequential Damages

The Seller's  liability to the Buyer for damages howsoever caused shall under no
circumstances  whatsoever  (including  the decision of an  arbitration  panel or
court of law)  exceed  the  payments  actually  received  by the  Seller for the
Supplies  and the Seller shall under no  circumstances  have any  liability  for
special,  incidental,  indirect  or  consequential  damages,  including  without
limitation liability for loss of use, loss of profits, damage or injury to other
property or persons.



<PAGE>



19.  Infringement of Proprietary Rights

a) The Seller shall  indemnify  and hold  harmless the Buyer against any and all
losses,  liabilities  and  expenses,  by reason of any third party claim,  suit,
action or proceeding for alleged  infringement  of any  copyright,  trademark or
patent  of the  Buyer's  Country  or  alleged  conversion  of any  trade  secret
resulting from or arising in connection with the manufacture,  installation, use
or sale of the Supplies or any part thereof  including  any and all judgments or
decrees which may be rendered against the Buyer (and reasonable  attorney's fees
if Seller  should  fail to defend as  provided  in  subsection  b)  hereof,  and
settlements  made  arising out of any such  claim,  suit,  action or  proceeding
provided,  however  that this  indemnity  shall not  extend to any  infringement
resulting  from a breach  by the  Buyer  of this  Agreement  or of the  Seller's
instructions for the operation of the Supplies.  The Seller shall however not be
liable for any  infringement  or claim based upon the use of the Supplies or any
portion of the  documentation  in combination with other equipment or technology
not supplied by the Seller or resulting from any modification made by the Buyer,
without approval or instruction by Seller.

b) The Seller shall defend at its own expense all suits,  actions or proceedings
brought  against the Buyer with respect to the matters  listed in  subsection a)
above. The Buyer shall have the right at its option and at its sole expense,  to
participate  in the  defense  of any such  claim,  suit,  action or  proceeding,
without  relieving  the  Seller of any  obligation  hereunder.  The Buyer  shall
promptly  notify the  Seller in writing  after any such claim is made or suit is
brought and shall  cooperate with Seller in the defense  thereof as requested by
the Seller,  and the Seller  agrees to  reimburse  the Buyer for its  reasonable
out-of-pocket  expenses incurred at Seller's specific request in connection with
such  cooperation.  The  Buyer  shall  immediately  notify  the  Seller  of  any
infringement  claim made or  threatened  and shall refrain from any admission of
liability,  and will not  negotiate  or enter into any  settlement  without  the
Seller's prior consent.

c) If,  however,  as a  consequence  of a final  determination  of any  suit for
infringement  or any court decision  involving any injunction  resulting from or
arising in connection  with the  manufacture or sale of the Supplies or any part
thereof furnished or employed by the Seller hereunder,  the Buyer is enjoined or
limited  in any  material  manner in the use of said  Supplies  or part,  Seller
shall,  at its option and at its own expense either i) procure for the Buyer the
right to continue use of said Supplies or part, ii) so modify the Supplies or

<PAGE>


part so as to render them  non-infringing  without any significant effect to use
thereof, or iii) replace the Supplies or part with an equivalent  non-infringing
product.


20. Seller's and Buyer's Proprietary Information

Upon completion of the Acceptance  Tests,  the Seller shall furnish to the Buyer
free of charge  information,  manuals  and  drawings  in English and with metric
units of measure  relating  to the  Supplies  and  instructions  to the Buyer in
sufficient  detail to enable the Buyer and its employees to operate,  calibrate,
maintain and repair the Supplies and all parts thereof.  A definitive version of
the documentation,  including the modifications that are specific to the Buyer's
configuration and that are made during the final stages of installation, will be
provided six (6) months after the  completion  of the  Acceptances  Tests.  Such
information,  manuals,  drawings  and  instructions  and the  written  materials
furnished  by the Seller to the Buyer  under the Section  entitled  "Preparatory
Work"  hereof shall remain the property of the Seller and the Buyer shall have a
royalty-free  license  to  use  the  same  in  connection  with  the  operation,
calibration, maintenance and repair of the Supplies. The Buyer shall not use any
of the proprietary information supplied by the Seller for any other purpose than
the operation, calibration, maintenance and repair of the Supplies and the Buyer
shall not register, apply for registration or attempt to acquire any other legal
protection  for the said  proprietary  information in its own name, or any other
name,  or take any  action  which may  affect  the  Seller's  rights,  title and
interest in and to the  technology in any country,  without  obtaining the prior
consent of the Seller.  The Buyer shall treat such  information and materials in
the same  manner  as it  treats  its own  proprietary  information  and will use
similar  means to  protect  it from  unauthorized  disclosure.  The  same  Buyer
covenants and agrees that the contents of such written  information or materials
shall  not be  divulged  to any other  person,  firm or  corporation,  except as
allowed above.

The Seller agrees that all  information  transmitted  from Buyer to Seller under
this contract  including but not limited to,  information  relating to research,
development, manufacturing, testing, accounting and marketing will be considered
confidential  information.   This  confidential  information  will  be  held  in
confidence and not disclosed to third parties by the Seller.  This  confidential
information  shall be held in  confidence by the Seller using the same degree of
care as the Seller uses in  protecting  its own  confidential  information.  The
Seller shall only use such  confidential  information for the purpose of meeting
its obligations under this Agreement.



<PAGE>



21. Destruction of Supplies

In the event that prior to the delivery of the Supplies,  the Supplies are lost,
destroyed  or  damaged  to such an extent  that  they  cannot  be  repaired  and
delivered  in  accordance  with the  delivery  schedule set forth in the Section
entitled "Installation of Supplies",  provided the event is not a willful act of
the Seller, the time reasonably  required by the Seller to furnish a replacement
for the  Supplies or to  accomplish  such  repairs  shall be deemed an Excusable
Delay under the Section entitled  "Excusable  Delay" and the Seller shall not be
deemed to be in default or to have breached its duties hereunder.



22. Excusable Delay

Notwithstanding anything to the contrary herein contained, if the performance of
this  Agreement  by any  party  or the  obligation  of any  party  hereunder  is
prevented,  restricted  or  interfered  with by reason of : i) fire,  explosion,
strike,  lockout,  labor  dispute,  casualty  or  accident,  epidemic,  cyclone,
drought,  flood or ii) war,  revolution,  riot, civil commotion,  acts of public
enemies,  blockage  or  embargo,  or iii) any law or  proclamation,  regulation,
ordinance, demand or requirement of any applicable government or any subdivision
thereof  or  representative  of any  such  government,  or iv)  any  other  acts
whatsoever,  whether  similar  or  dissimilar  to those  enumerated,  beyond the
reasonable  control of a party  hereto,  then,  and in that event,  the party so
affected  shall  promptly  notify the other  party of all  reasonable  resulting
difficulties.  Upon such notice,  the disabled party shall,  for the duration of
its disability (referred to as "Excusable Delay" in this Agreement),  be excused
from the performance of such of its obligations as are prevented, restricted, or
interfered  with  by  reason  of the  occurrence  of any  of  the  events  above
enumerated  and such  party  shall  not be deemed to be in  default  under  this
Agreement  nor be subject to any  liability  or damage.  The time period  during
which any party is to perform  under this  Agreement  shall be  extended  by the
period of any Excusable Delay. Excusable Delay under the same terms occurring in
respect to the Seller's  sub-contractors  shall be deemed to be Excusable  Delay
occurring to the Seller.

If the Seller is prevented from proceeding according to any of the schedules set
out in this Agreement by the Buyer's fault, by a delay on the part of the Buyer,

<PAGE>


or by a regulatory body with jurisdiction over the Buyer's site, or if the Buyer
delays a payment or the issuance of a Letter of Credit  pursuant to Section 3 by
more than fifteen (15) days past the due date,  then all the dates  contained in
this  Agreement  for  completion  by the Seller of its  obligations  and rights,
including but not limited to the right to exercise the accelerated  delivery and
acceptance  option,  shall be  postponed  by an  additional  period equal to the
delay.


23. Termination for Insolvency

In the event that either the Buyer or the Seller :

a) makes a general assignment for the benefit of creditors or becomes insolvent;

b) files an insolvency petition in bankruptcy;

c) petitions for or acquiesces in the  appointment  of any receiver,  trustee or
similar officer to liquidate or conserve its business or any substantial part of
its assets ;

d) commences,  under the laws of any jurisdiction,  any proceeding involving its
insolvency,  bankruptcy,   reorganization,   adjustment  of  debt,  dissolution,
liquidation  or any other  similar  proceeding  for the  release of  financially
distressed debtors ; or

e) becomes a party to any proceeding or action of the type described above in c)
or d) and such proceeding or action remains undismissed or unstayed for a period
of more than sixty (60) days,


then the other party may, by written notice, terminate this Agreement.


24. Spare Parts

The Seller agrees to make available to the Buyer,  as the Buyer may from time to
time require, ________________,  spare parts and components to the Supplies, and
the  Seller  agrees to exert  reasonable  efforts to meet the  Buyer's  delivery
requirements  for said parts and  components  or acceptable  substitutes.  It is
understood  that the  parties  shall  negotiate  in good  faith  reasonable  and
mutually agreeable prices for said spare parts and components.



<PAGE>



25. Technical Assistance by the Seller

Immediately  following the  successful  completion of the  Acceptance  Tests the
Seller  shall send one of its  specialists  to assist the Buyer in bringing  the
cyclotron to full  operational  capacity.  The  specialist  shall be the project
coordinator  or, if he is not  available,  someone of equal or better  technical
expertise,  this other person to be approved by the Buyer,  such approval not to
be unreasonably  withheld. The Seller's specialist will remain at the site for a
period of 28 days unless the Buyer  agrees that the  services of the  specialist
are no longer required.  During this period,  the Buyer's specialist will define
the tasks to be  performed  by the  Seller's  specialist  with the  objective of
verifying  the  cyclotron  1) is fully  operational,  2) performs  according  to
specifications  within the production  environment and 3) its automated  control
system performs according to specifications. This period of technical assistance
does not relieve the Seller of any of its warranty  obligations,  including  the
requirement  that the Seller  send any  personnel  required  to the Site to make
repairs  should the  Supplies  be found to not meet  specifications  during this
period.


26. Entire Agreement

This Agreement,  made in two originals,  one for each party, contains the entire
agreement  between the parties and shall  supersede all previous  communications
and  agreements,  whether oral or written,  with  respect to the subject  matter
hereof and the provisions  hereof may not be modified or superseded except by an
instrument in writing signed by a duly authorized  officer or  representative of
each of the parties hereto.


27. Authorization

By virtue of having  affixed  their  respective  signatures  below,  each of the
parties  hereto  warrants  that it has obtained all  authorization  necessary to
enter into and perform its obligations under this Agreement.


28. Effective Date

This Agreement  shall become  effective as of the date upon which payment i), as
set forth in Section entitled  "Purchase Price of the Supplies",  is received by
the Seller.



<PAGE>



29. Disputes

With respect to any  controversy  arising out of or relating to this  Agreement,
such controversy shall be settled by final and binding  arbitration in New York,
NY,  USA,  in  accordance  with the  then-existing  rules (the  "Rules")  of the
American Arbitration Association ("AAA") and judgment upon the award rendered by
the  arbitrators  may be  entered  in any  court  having  jurisdiction  thereof;
provided,  however,  that the law applicable to any  controversy  and the law by
which this  Agreement  shall be construed  and governed  shall be the law of the
State  of New  York,  regardless  of its or  any  jurisdiction's  choice  of law
principles.  In any  arbitration,  pursuant  to this  Agreement,  the  award  or
decision  shall  be  rendered  by a  majority  of  the  members  of a  Board  of
Arbitration  consisting of three (3) members,  one of whom shall be appointed by
each  party  and the  third of whom  shall be the  Chairman  of the panel and be
appointed by mutual agreement of said two  party-appointed  arbitrators.  In the
event of failure of said two  arbitrators  to agree upon the  appointment of the
third  arbitrator   within  sixty  (60)  days  after  the  commencement  of  the
arbitration  proceeding,  the third  arbitrator shall be appointed by the AAA in
accordance  with the Rules. In the event that either party shall fail to appoint
an arbitrator  within thirty (30) days after the commencement of the arbitration
proceeding,  such arbitrator and the third  arbitrator shall be appointed by the
AAA in  accordance  with the  Rules.  The  Rules of  Evidence  and the  Right to
Discovery shall be applicable to both parties.

Work under this Agreement shall continue during the arbitration  proceedings and
payments due to the Seller shall not be withheld on account of such  proceedings
unless such  particular work or payment is the subject matter of the arbitration
in which case this provision shall not apply to such particular work or payment.

The parties agree to equally share the expenses associated with this arbitration
procedure.


30. Governing Laws

This Agreement  shall be governed by and construed in all respects in accordance
with the laws of the State of New York, USA.



<PAGE>



31. Notices

a) Any notice  given under this  Agreement  shall be made in  writing,  shall be
given by first class air mail,  telex,  telecopier or commercial cable and shall
be addressed to :

In the case of the Seller:
      Ion Beam Applications
      Chemin du Cyclotron, 3
      1348 Louvain-la-Neuve
      Belgium
      Attn : Mr. Yves Jongen
      Fax Number : 32-10-47.58.10

In the case of the Buyer :
      Theragenics Corporation
      5325, Oakbrook Parkway
      Norcross, GA 30093
      USA
      Attn : Mr. Glenn Dill
      Fax Number : 1 (404) 381 84 47

Either party,  by written  notice to the other,  may change the address to which
notices will be directed.

b) Any notice shall be deemed given on the date personally  delivered or sent by
telex,  telecopier or cable and fifteen (15) days after the date of mailing,  if
mailed.


32. Project Coordinator

Upon signing this Agreement,  both parties shall designate a representative  who
will act as Project  Coordinator  and official  addressee for all  communication
resulting from this  Agreement,  other than any official  notice given under the
Section  entitled   "Notices".   All  requests  for  service,   transmittals  of
information,  reports on training  activity,  and other  communication  required
under this  agreement  shall be sent by and directed to the  respective  Project
Coordinators. Informal conversations occurring person-to-person or by phone,

<PAGE>


requests and  information  shall be validated by an appropriate  written form as
confirmation.  Any communication sent to others than those designated as Project
Coordinators,  or in a  manner  not in  accordance  with the  Notices  procedure
specified in this Agreement will be considered as informal and non-existent.


33. Assignment

This  Agreement  shall inure to the  benefit of and be binding  upon each of the
parties hereto and their  respective  successors and assignees,  but neither the
rights nor the duties of either party hereunder may be assigned,  in whole or in
part by either party, without the prior written consent of the other party. Such
consent shall not be unreasonably withheld by either party. Any assignment shall
not relieve the assignee of any of the Agreement obligations of the assignor.


34. Headings

The headings  contained  within this  Agreement are  established  solely for the
convenience  of the  two  parties  and  are not  intended  to and do not  limit,
construe or modify any of the terms and conditions included hereof.


35. Severability

If  any  term  or  provision  of  this  Agreement  is  held  to  be  illegal  or
unenforceable, then this Agreement, except for such part or parts thereof, shall
continue to be in full force and effect.

In the event of any  inconsistency  between a provision of the conditions of the
Agreement and the content of an Appendix to this  Agreement,  and if the parties
cannot  agree on the  clause to take  precedence,  the AAA of Section 29 will be
asked to  mediate/arbitrate  the dispute  and the parties  agree to abide by the
finding of said association.



36.  Non-Waiver

The failure by either party to enforce at any time or for any period of time any
of the  provisions  hereof shall not be a waiver of such  provisions  nor of the
right of such party thereafter to enforce each and every such provision.


<PAGE>


IN WITNESS  WHEREOF,  the parties  have caused this  Agreement to be executed in
duplicate by their duly qualified officers or representatives.

THERAGENICS CORPORATION Inc.

Not Required
Christine Jacobs
President

/s/ Bruce Smith                                      /s/ Glenn Dill
Bruce Smith                                          Glenn Dill
Chief Financial Officer                              Director of Operations

ION BEAM APPLICATIONS, S.A.

/s/ Yves Jongen                                      /s/Sabine de Vohgel
Yves Jongen                                          Sabine de Voghel
President                                            Area Sales Manager




<PAGE>


                                    APPENDIX

                              CYCLOTRON PARAMETERS



























































































































































<PAGE>


                                    APPENDIX




















































<PAGE>


                                    APPENDIX

                              BUILDING REQUIREMENTS



























































































































































<PAGE>


                                    APPENDIX

                       BUILDING COMPLETION SPECIFICATIONS















































































































































































































<PAGE>


                                    APPENDIX

                              INCLUDED SPARE PARTS

















































<PAGE>


                                    APPENDIX

                               ACCEPTANCE CRITERIA



















































<PAGE>


                                    APPENDIX

                                ACCEPTANCE TESTS



















































<PAGE>


                                    APPENDIX

                   ACCELERATED DELIVERY AND ACCEPTANCE OPTION




The Buyer has the option to  request  to the  Seller,  at any time  during  this
Agreement,  to work on an  accelerated  schedule  basis  in  order  to have  the
Supplies  accepted  at an earlier  date than the  scheduled  acceptance  date of
_____________.  Official  request must be made in writing and  addressed to Yves
Jongen, President of IBA.

In the case the Buyer  exercises  this option,  the Buyer will pay the Seller an
additional sum of _____________ for each complete day between the actual date of
early acceptance and __________, including the day of ______________.


                                EXHIBIT 10.23(b)

                               Purchase Agreement
                                     between
                             Theragenics Corporation
                                       and
                           Ion Beam Applications s.a.
                                      dated
                                December 27, 1996


Confidentialportions of this  document have been blanked out and have been filed
            separately with the Securities and Exchange Commission.

<PAGE>










                               Purchase Agreement

                                     between

                          Theragenics Corporation Inc.

                                       and

                           Ion Beam Applications S.A.

                                       for

                       _______________ Cyclotron Number 6

                                       and

                            Related Target Equipment








<PAGE>


                                Table of Contents
Purchase Agreement
1.  Interpretation............................................................3
2.  Subject Matter of Sale....................................................4
3.  Purchase Price of the Supplies............................................5
4.  Title and Risk of Loss....................................................7
5.  Delivery..................................................................7
6.  Installation of Supplies..................................................7
7.  Preparatory Work..........................................................9
8.  Acceptance...............................................................11
9.  Transportation and Insurance.............................................13
10. Export Documents, Duties and Foreign Taxes...............................14
11. Customs Duties, Buyer's Country Taxes and Import Permits.................14
12. Warranty As To Title.....................................................14
13. Design and Performance Warranty..........................................15
14. Material and Workmanship Warranty........................................15
15. Logging of Operations....................................................16
16. Training.................................................................16
17. Disclaimer of Liability for Personal Injury..............................16
18. Liability for Consequential Damages......................................17
19.  Infringement of Proprietary Rights......................................18
20. Seller's and Buyer's Proprietary Information.............................19
21. Destruction of Supplies..................................................20
22. Excusable Delay..........................................................20
23. Termination for Insolvency...............................................21
24. Spare Parts..............................................................21
25. Technical Assistance by the Seller.......................................21
26. Entire Agreement.........................................................22
27. Authorization............................................................22
28. Effective Date...........................................................22
29. Disputes.................................................................23
30. Governing Laws...........................................................23
31. Notices..................................................................23
32. Project Coordinator......................................................24
33. Assignment...............................................................25
34. Headings.................................................................25
35. Severability.............................................................25
36. Non-Waiver...............................................................25

Appendices
Cyclotron Parameters
- ---------------------------
Building Requirements
Building Completion Specifications
Included Spare Parts
Acceptance Criteria
Acceptance Tests
Accelerated Delivery and Acceptance Option





<PAGE>


                               Purchase Agreement


AGREEMENT  made as of this 27th day of  December  1996 by and  between  ION BEAM
APPLICATIONS,  S.A., a corporation  organized under the laws of Belgium,  having
its principal  office at Chemin du Cyclotron 3, 1348  Louvain-la-Neuve,  Belgium
(hereinafter  called the "Seller",  which expression includes its successors and
permitted assignees) and THERAGENICS CORPORATION, having its principal office at
5325 Oakbrook  Parkway,  Norcross,  Georgia 30093, USA  (hereinafter  called the
"Buyer", which expression includes its successors and permitted assignees).

WITNESSETH :

WHEREAS, the Seller wishes to sell to the Buyer and the Buyer wishes to buy from
the Seller, the Seller's model _________ cyclotron,  related _________ equipment
and spare parts therefore, all as more particularly described herein : and

WHEREAS,  the Buyer wishes the Seller to assemble,  install,  start up, test and
make operational the ______________  cyclotron to be purchased including related
equipment and the Seller is willing to undertake this task : and

NOW, THEREFORE,  in consideration of the mutual covenants herein contained,  the
parties hereto agree as follows :


1. Interpretation

In this Agreement, unless the contrary intention appears :

"Acceptance" means the process whereby the Seller demonstrates to the Buyer that
the Supplies provided meet the requirements of the Agreement. This process shall
consist of a series of tests,  the  "Acceptance  Tests" as  defined in  Appendix
"Acceptance   Tests",   which  demonstrate  the  Supplies  meet  the  guaranteed
specifications, the Acceptance Criteria.


<PAGE>


"Acceptance  Criteria"  mean the  guaranteed  specifications  of the Supplies as
defined in Appendix "Acceptance Criteria".

"Acceptance  Date"  means the date on which the Buyer  agrees  that based on the
Acceptance  Tests, the Supplies have met the Acceptance  Criteria . The Supplies
shall be deemed  accepted  when the Buyer and Seller  agree in writing  that the
Acceptance Tests have been successfully completed.

"Acceptance Tests" are the tests listed in Appendix "Acceptance Tests".

"Agreement" means this document and includes its Appendices.

"Buyer's Country" means the country where the Site is located.

"Day" means calendar day;  "Week" means  calendar  week;  "Month" means calendar
month.

When the last day of any period  prescribed  for the execution of any assignment
falls on a day which is not a working day in Belgium or in the Buyer's  Country,
the  assignment  may be  performed  on  the  first  working  day  following  the
aforementioned day.

"Effective Date" has the meaning set forth in Section entitled "Effective Date".

"Excusable  Delay"  has the  meaning  set forth in Section  entitled  "Excusable
Delay".

"Site" means the Buyer's facility in Buford, Georgia, USA.

"Supplies" means all equipment,  hardware, software (including installation) and
the  associated  documentation,  support  equipment  and services to be provided
under the Agreement, as detailed in Appendix "Cyclotron Parameters" and Appendix
"_________________________".



<PAGE>



2. Subject Matter of Sale

Subject to the terms and conditions of this Agreement :

a) The Seller  shall sell and deliver to the Buyer and the Buyer shall  purchase
from the Seller (i) a __________ model cyclotron,  the technical  specifications
of  which  are more  fully  described  in the  Appendix  "Cyclotron  Parameters"
Appendix hereto; (ii) _________________________, the technical specifications of
which are more  fully  described  in the  Appendix  "__________________________"
hereto;  and (iii) a set of spare parts listed in the Appendix  "Included  Spare
Parts" hereto;

b) The Seller shall also assemble, install, start up, test, make operational and
perform the Acceptance Tests on the Supplies.

c) The  Seller  shall  send one of his  specialists  to assist in  bringing  the
cyclotron to full  operational  capacity after Acceptance of the Supplies by the
Buyer, as described in Section 25.

d) The Buyer and  Seller  agree  that an option  for  accelerated  delivery  and
acceptance as described in Appendix "Accelerated Delivery and Acceptance Option"
may be  exercised  by the Buyer.  In case that option is exercised by the Buyer,
the covenants of the "Accelerated Delivery and Acceptance Option" Appendix shall
be applicable to both parties.


3. Purchase Price of the Supplies

a) The  aggregate  purchase  price  (hereinafter  the "Price") of the  Supplies,
including  packaging,  insurance and transportation of the Supplies to the Site,
the  assembly,  testing and start up of the  Supplies  described  in the Section
entitled  "Subject  Matter  of  Sale"  above,  shall  be  ______________________
_______________________  This price shall also include the technical  assistance
by the Seller as  described in Section 25, the Spare Parts as listed in Appendix
"Included  Spare  Parts" and the Seller's  contribution  to the  applicable  USA
customs duty as stated in Section 11 of this Agreement.

b) As a down payment  equivalent to  ____________ has  been made by the Buyer to
the Seller on November 6, 1996, the balance of the Price set forth in subsection
a) shall be payable as follows:


<PAGE>


     i) ___________  ____________________________________________________  to be
paid to the Seller upon execution of this Agreement;

     ii)  ___________________________________________________________ to be paid
to the  Seller  on  March 1,  1997.  This  payment  shall  be  guaranteed  by an
irrevocable  standby  letter of credit to be issued in favor of and  approved by
the Seller within one month from the Effective Date.

     iii)_____________________________________________________________   to   be
paid to the Seller on  ______________.  This payment  shall be  guaranteed by an
irrevocable  standby  letter of credit to be issued in favor of and  approved by
the Seller by March 1, 1997.

     iv)_____________________________________________________  to be paid to the
Seller  within 15 days from  shipment of the Supplies as evidenced by receipt of
the  shipping  documents  and no later  than  March 1, 1998 if the  shipment  is
delayed by Buyer's  fault.  This payment shall be  guaranteed by an  irrevocable
standby  Letter of Credit to be issued in favor of and approved by the Seller by
the date of shipping of the  Supplies,  to be notified by Seller to the Buyer at
least 30 days in advance.

     v)_________________________________________________________  to be  paid to
the Seller within 15 days of the Acceptance of the Supplies.  This payment shall
be guaranteed by an  irrevocable  stand-by  Letter of Credit,  which can only be
exercised  during  the  year  following  the  delivery  of  the  Supplies,   and
conditioned  only  upon  successful  completion  of  the  Acceptance  Tests  and
providing  further  that,  in the event the Seller is  prevented  by the Buyer's
fault,  by a delay  on the  part of the  Buyer,  or by a  regulatory  body  with
jurisdiction over the Buyer from completing the Acceptance Tests for a period of
sixty (60) days or more,  payment  thereunder  to the Seller  shall be made upon
demand of the  Seller.  This  Letter  of Credit  shall be issued in favor of and
approved by the Seller,  such approval not to be unreasonably  withheld,  by the
date of  shipping  of the  Supplies,  to be notified by Seller to Buyer at least
thirty days in advance.

c) All  payments  by the Buyer to the Seller  under this  Agreement  shall be in
Belgian Francs and,  except those  specified in paragraph 3. b) above,  shall be
made by wire transfer within thirty (30) days from the date of invoice.


<PAGE>


d) All  payments  by the Buyer to the Seller will be deemed to have been made by
the Buyer on the date on which  the  Seller  has been  credited  for the  proper
amounts.  Any payment due to the Seller  which is not paid on the due date shall
accrue  interest for each started  month of delay at an annual rate of one point
above  the rate of the  "Avance  en Compte  Courant  Hors  Plafond  de la Banque
Nationale de Belgique" as published in "l'Echo" on the first day of such month.


4. Title and Risk of Loss

Except as indicated  below in this  paragraph,  title to the  Supplies  shall be
transferred  from the Seller to the Buyer when and to the  extent  payments  are
received by the Seller.  The Buyer  represents  and  warrants  that it shall not
cause or permit to be caused  any lien or  encumbrance  of any kind to be placed
upon the  Supplies  to an  extent  greater  than its share of  ownership  in the
Supplies.  It is  understood  that if the  Seller is unable to  demonstrate  the
Supplies  meet  the  Acceptance  Criteria  within  one year of  delivery  of the
Supplies to the Buyer's Site, clear title to the Supplies transfers to the Buyer
without  obligation to pay to the Seller the final payment  specified in Section
3.b.v unless the Seller has been prevented from conducting the Acceptance  Tests
as described in Section 8, last paragraph.

Risk of loss of any part of the Supplies shall pass from the Seller to the Buyer
upon delivery of such parts to the Site.


5. Delivery

The  Seller  shall  deliver  the  Supplies  to the Buyer at the Site and set the
Supplies in their final location.


6. Installation of Supplies

a) The assembly and  installation of the Supplies at the Site and the Acceptance
Tests are  planned to be  completed  by  _________________________________ after
completion  of  Site  preparation  by  the  Buyer  at  the  Seller's  reasonable
satisfaction  as  evidenced  by  an  acceptance  document  of  the  Site  ("Site
Acceptance  Document")  signed by the  Seller,  whichever  is later.  The Seller
undertakes to make its best efforts to complete the installation and testing

<PAGE>


within this period.  During the  installation  period the Buyer shall permit the
Seller's  employees,  subcontractors  or  agents  unlimited  access  to the Site
provided said  individuals  comply with policies and procedures  established for
the Buyer's employees regarding such matters as health and safety issues.

b)  With  reasonable  notice  to  the  Seller,  the  Buyer  and  its  authorized
representatives  shall,  during reasonable working hours, be free to inspect the
quality and  conditions of the Supplies at the Seller's site during  fabrication
and at any time upon arrival of the same at the Site and during the installation
period.  The Seller will notify in writing to the Buyer when the major materials
are available for construction of the cyclotron.

c) The Buyer at its sole expense shall  provide the Seller with closed  premises
on or reasonably  near the Site in which the Seller may store employee  clothing
and tools and equipment required for the installation.  However,  the Buyer does
not assume any risk with respect to the loss or theft of any such items while on
the Buyer's premises.

d) The Buyer shall,  at its sole expense,  provide the Seller with the following
utilities  required for installation of the Supplies and Acceptance Tests on the
Supplies:  electricity,  water,  compressed  air,  dry  nitrogen for venting the
vacuum  chamber,  hydrogen  gas for the ion  source,  as  described  in Appendix
"Building Requirements".  Access to telephone and fax equipment connected to the
international network is required and the Seller will pay the charges associated
with the use of this line.  The Buyer shall provide all the necessary  radiation
measuring  equipment  required for the operation and the Acceptance Tests on the
Supplies.

e) Within  fifteen  (15) days from the date of delivery of the  cyclotron at the
Site, the Buyer shall permit the Seller to produce beams at full energy and full
intensity in the cyclotron vault.

f) The Price  reflects labor  provided by the Seller.  Any  additional  labor or
costs  required by local labor codes,  etc.  will be the  responsibility  of the
Buyer.

g) The Supplies are manufactured  according to Belgian technical  standards.  If
the Buyer requires compliance of the Supplies with specific technical standards,
these  technical  standards  must be notified by the Buyer to the Seller  within
seven weeks of the Effective Date. All additional costs related to making the

<PAGE>


Supplies  conform to those norms or specific  standards  shall be charged to the
Buyer.


7. Preparatory Work

a) The Buyer shall have the sole  responsibility,  at its sole expense,  for the
work required to prepare the Site for installation of the Supplies. The building
to house the Supplies and the systems  contained  therein  shall comply with the
specifications   detailed  in  Appendix  "Building  Requirements"  and  Appendix
"Building Completion Specifications". As soon as possible after completion, and,
at the  latest,  ________________  the  Seller  shall  prepare  for the  Buyer a
proposed  layout and prepare such other plans and  memoranda as are necessary to
transmit data to the Buyer's  architects and  engineers.  By  _____________  the
Buyer shall furnish to the Seller  drawings and plans for the Site including the
building and systems detailed in Appendix  "Building  Requirements" and Appendix
"Building  Completion  Specifications" in sufficient detail to enable the Seller
to judge  whether the Site will be  satisfactory  for the Supplies and will meet
the  specifications  detailed in Appendix  "Building  Requirements" and Appendix
"Building  Completion  Specifications".  Within four (4) weeks of the receipt of
this initial set of architectural and engineering drawings and plans, the Seller
shall provide the Buyer with  comments  thereon and detailed  information  as to
such modifications therein as the Seller deems necessary including such drawings
and  technical  documents  as may be  required  by the  Buyer  to  complete  the
installation of the cables,  cooling water and compressed air systems.  However,
the time devoted to preparation by personnel of Seller of additional  layouts or
drawings  and/or  reviews  of  revised  sets of  architectural  and  engineering
drawings will be invoiced at Seller's  regular rates. No additional  charge will
be made for telephone  consultations.  Travel and related expenses incurred as a
result of attendance by personnel of the Seller  required at meeting  outside of
Belgium   with   the   Buyer's   architects,   engineers,   consultants   and/or
representatives  will be reimbursed by the Buyer. With respect to the foregoing,
the  responsibility  for  determining  whether  conflict  exists  between  local
building  codes and/or other laws or government  regulations  and the content of
drawings,  data sheets,  memoranda or other forms of communication  submitted by
the Seller is solely the responsibility of the Buyer, his architects,  engineers
and/or  consultants.  The  definitive  drawings and plans for the Site,  made in
accordance  with  the  Seller's  comments  and  recommendations,  will  then  be
furnished by the Buyer to the Seller by  ________________.  In addition,  unless
otherwise specified, the Buyer shall have the sole responsibility for the design
and construction of the radiation monitoring systems, of the shielding required

<PAGE>


to prevent  radiation leakage and of the systems required to handle the disposal
of radioactive waste.

Any delay on the part of the Seller in meeting its  obligations  related to this
Section  by more  than ten (10)  days  will add a number  of days to the  period
provided for the  performance  by the Buyer equal to the number of days of delay
by the Seller.

b) Before  commencing  installation,  the Seller shall  inspect the Site and the
Buyer shall  submit to the Seller the Site  Acceptance  Document to be signed by
the Seller confirming that the preparatory work meets all the criteria set forth
in the Section entitled  "Installation of Supplies",  paragraph c) and d) and in
Appendix   "Building    Requirements"   and   Appendix   "Building    Completion
Specifications".   This   acceptance   document  only   indicates  the  Seller's
willingness to begin the  installation of the Supplies in the Buyer's  building.
It  does  not  discharge  the  Buyer  and  his  subcontractors  of any of  their
responsibilities   regarding  the  building.   The  Buyer  shall   complete  the
preparatory work at the Site by ____________. If the preparatory work as regards
the cyclotron vault is substantially completed before that date, the Buyer shall
accept  delivery  and/or  installation of the Supplies as soon as possible under
the applicable  laws and  regulations.  In the event that such work has not been
completed  before that date,  or if for any other  reason the Buyer is unable to
accept delivery of the Supplies or commencement of the  installation  thereof by
that date,  the Buyer shall  immediately  give the Seller written notice of this
fact and the anticipated new date for completion of the preparatory work. In any
case,  the Seller may ship the  Supplies  to the Buyer at any time and the Buyer
shall store them in one of its warehouses until the date the preparatory work is
completed.

c) One week before  commencing  installation and setting of the cyclotron in its
vault,  the Buyer shall allow the Seller  full  access to the  cyclotron  vault,
power supplies and control room and all other rooms related to the  installation
of the Supplies to allow for the measurement of line-up marks to be performed.

d) The Buyer's completion,  to the reasonable satisfaction of the Seller, of its
undertakings  in this  section  and  elsewhere  in this  Agreement  relating  to
preparation of the Site and the continuous  furnishing of necessary services and
permits set forth in the Section entitled "Installation of Supplies",  paragraph
c), d) and e) and in Section entitled "Custom Duties,  Buyer's Country Taxes and
Import  Permits"  and  the   requirements   detailed   in   Appendix   "Building

<PAGE>


Requirements"  and  Appendix  "Building  Completion  Specifications"  shall be a
condition precedent to the Seller's commitment to perform within the time period
specified under the Section entitled  "Installation of Supplies" hereof, and any
delay or  interruption  by the  Buyer in  meeting  its  obligations  under  this
Agreement in a timely  fashion  shall extend the Seller's  time to perform under
this  Agreement  including  but not  limited to Seller's  time to  exercise  and
perform under the option for  accelerated  delivery and  acceptance  outlined in
Appendix  "Accelerated Delivery and Acceptance Option", by a period equal to the
period of the Buyer's delay or interruption plus, if shipment and/or delivery is
delayed by Buyer's  fault or at Buyer's  request,  an  additional  period not to
exceed four weeks to reschedule  shipment and/or delivery of the Supplies and/or
personnel as may be required.

In the event of any such delay or  interruption,  the Buyer will  reimburse  the
Seller for any  reasonable  costs  incurred as a direct  result of such delay or
interruption.  Additionally,  if such  postponement or  interruption  delays the
Buyer's  obligation  to make any of the payments  set forth in Section  entitled
"Purchase Price of the Supplies", paragraph b) hereof, interest will be computed
for each  started  month of delay at an annual  rate one point above the rate of
the "Avance en Compte  Courant Hors Plafond de la Banque  Nationale de Belgique"
as published in "l'Echo" on the first day of such month.

If all the  conditions  necessary  for the  Seller  to sign the Site  Acceptance
Document  referred  to in the  above  Section  have  not been met at the time of
delivery of the Supplies,  the Seller will  nonetheless make its best efforts to
start the  installation  of the Supplies as soon as reasonably  possible and the
Buyer will give the Seller any reasonable  support to allow the Seller to do so.
However,  beginning of installation of the Supplies in the building,  under such
conditions,  will under no circumstances be considered as implicit acceptance of
the Site by the Seller.


8. Acceptance

On the date set by the Seller for the conduct of the  Acceptance  Tests,  and in
the presence of the Buyer's  representatives,  the Seller shall begin to conduct
the agreed-upon Acceptance Tests.

Not more than twenty four (24) hours following the completion of such tests, the
Buyer shall either accept the Supplies as conforming to the  requirements of the
Agreement by issuing an acceptance certificate "Acceptance Certificate"

<PAGE>


cknowledging  that  decision,  or advise  the Seller in writing of the extent to
which the Supplies do not meet the requirements of the Agreement.

The Buyer shall not withhold the issue of the Acceptance  Certificate on account
of minor omissions or defects in the Supplies which do not substantially  affect
their use but may designate in the Acceptance  Certificate such minors omissions
or defects. The Seller shall promptly make good these omissions or defects.

If the Buyer does not give notice within the period  stipulated above, or begins
using the  Supplies for its own use,  such tests shall be deemed  satisfactorily
completed,  the Acceptance  Certificate  shall be deemed issued on that date and
the related  acceptance  payment shall be paid to the Seller within 15 days from
that date.

If  the  Buyer   gives  the  Seller   notice  that  such  tests  have  not  been
satisfactorily  completed,  the  Seller  shall  make  such  adjustments  as  are
necessary  and  repeat  the   Acceptance   Tests  until  the  Buyer  deems  them
satisfactory pursuant to the terms set out above.

Until  ______________  the Seller shall have unimpeded access to the Supplies to
complete the Acceptance Tests. If the Seller is unable to successfully  complete
the Acceptance Tests by  _____________,  the Buyer shall be free to begin use of
the  Supplies  forty five (45) days later.  Should the  Supplies be put into use
under this  condition,  it is  understood  the Buyer and Seller will make a good
faith effort to facilitate  the completion of the  Acceptance  Tests,  but it is
further  understood that the Buyer's production of Pd-103 with the machine takes
precedence.  The Buyer agrees to allow the Seller three (3) prescheduled days of
unimpeded   access  to  the  Supplies  per  month  during  the  period  between,
_____________ until  the period for  acceptance  has  expired  as  specified  in
Section 4 "Title and Risk of Loss".

If a dispute  arises  between  the Buyer and the Seller  concerning  whether the
Acceptance Tests have been successfully  completed or concerning the issuance of
the  Acceptance  Certificate,  the Buyer and the Seller  will  jointly  agree to
obtain the services of the American Arbitration Association ("AAA") to arbitrate
the dispute,  as described in Section 29  hereafter.  Both parties will abide by
AAA's recommendations.


<PAGE>


If the Seller is prevented  either by the Buyer or by any  regulatory  body that
has juridiction over the Buyer from conducting the Acceptance Tests for a period
of sixty (60) days,  the Buyer  shall be deemed to have  accepted  the  Supplies
sixty  (60) days  after the  Seller  was first  prevented  from  conducting  the
Acceptance  Tests. If the Seller is prevented by force majeure or events similar
to  those  enumerated  under  Section  "Excusable  Delay"  from  conducting  the
Acceptance  Tests, the Buyer shall pay 50% of the Acceptance  payment as defined
in Section 3 b) v). In either  case the Seller  shall  complete  the  Acceptance
Tests within the period remaining at the time the impediment began.


9. Transportation and Insurance

Seller shall at its own expense :

i) Obtain appropriate  property and liability  insurance covering loss or damage
to the Supplies  and  injuries to  individuals  during the  construction  of the
Supplies and during the  transportation  of the Supplies from the Seller's plant
to the Site.

ii) Pay all freight and other transportation charges associated with delivery of
the Supplies to the Site, and have a representative  present during the transfer
of the Supplies from the port of entry to the Site.

iii) Maintain worker's compensation insurance during the assembly,  installation
and testing of the  Supplies,  as  required  by  applicable  law,  covering  its
employees  and,  upon request  from Buyer,  provide a  certificate  of insurance
evidencing such coverage.

Buyer shall at its own expense:

i) Obtain appropriate  property and liability  insurance covering loss or damage
to the Supplies  between  delivery of the Supplies at the Site and the time when
the  Seller  has  been  paid in full  for the  amounts  under  Section  entitled
"Purchase Price of the Supplies". In such insurance policies, both the Buyer and
the Seller shall be named as insured parties.

ii) Arrange for the  destruction,  pick-up  and/or  clearing  away of all waste,
including the Supplies  packaging  except for the disposal of radioactive  waste
which is covered in section 12 of appendix "Building Completion Specifications".


<PAGE>


The Buyer and the Seller  shall each take out and  maintain at their own expense
during the period from receipt of the  Supplies at the Site through  Acceptance,
insurance to provide  coverage for both itself and the other party for an amount
of at least one million US dollars  (US$  1,000,000)  per  accident  against any
direct and indirect liability for bodily injury and death to individuals and all
direct or  indirect  costs,  losses  and  damages to the  property  of the other
arising  out of  each  other's  acts  or  omissions  in  unloading,  assembling,
installing and testing of the Supplies.


10. Export Documents, Duties and Foreign Taxes

The Seller will be  responsible  for obtaining all necessary  export  permits or
licences  relating  to the  Supplies  and the Buyer will  offer such  reasonable
assistance  in this regard as the Seller may  request.  The Seller shall pay any
and all export  duties and all other taxes  required  to be paid  outside of the
Buyer's Country in connection with the sale of the Supplies.


11. Customs Duties, Buyer's Country Taxes and Import Permits

The Buyer  shall pay all sales,  use,  gross  receipts,  excise and other  taxes
assessed  or levied by the  Buyer's  Country or any other  taxing  jurisdiction,
state or local,  within the Buyer's  Country,  against the Buyer  (including any
fines, penalties and interests thereof) as a result of or in connection with the
sale, use, delivery, storage or transfer of the Supplies.

The Seller agrees to equally share with the Buyer the cost of the import customs
duties levied by the customs authorities of the USA at the entry of the Supplies
into the USA, up to a maximum  cost for the Seller  equal to two percent (2%) of
the price of the Supplies.

The Buyer shall be responsible  for obtaining all necessary  permits or licences
with respect to the  importation of the Supplies in the Buyer's  Country and the
installation  and use of the Supplies at the Site, and the Seller will offer the
Buyer such reasonable assistance in this regard as the Buyer may request.


12.  Warranty As To Title

The Seller warrants good title to the Supplies.



<PAGE>



13. Design and Performance Warranty

The Seller hereby  warrants  that the Supplies  will perform in accordance  with
applicable  design  and  performance   specifications   set  forth  in  Appendix
"Cyclotron Parameters" and in Appendix  ___________________________ for a period
of one (1) year after the  Acceptance  Date. The Seller shall resolve any design
flaws appearing during the first year following the Acceptance of the Supplies.


14. Material and Workmanship Warranty

The  Seller  hereby  warrants  that the  Supplies  will be free from  defects in
material  and  workmanship  for a  period  of one  (1)  year  from  the  date of
acceptance of the Supplies by the Buyer or fifteen (15) months from the date the
Supplies are put in their final  location in the Buyer's vault if the Acceptance
Date is delayed at the Buyer's  request or through the Buyer's fault,  whichever
period is shorter: provided,  however, that this warranty shall not apply to ion
source stamped cathodes and chimneys,  puller electrodes,  air filters, targets,
oil for the vacuum  pumps,  demineralizing  column,  gas bottles (H2 for the ion
source, N2 for  venting,...),  and other  consumables;  that the Seller makes no
warranty with respect to failures notified after the warranty period or failures
during operation without logging or failures due to alteration, misapplications,
abuse, abnormal conditions of temperature,  dirt, corrosive matter,  maintenance
not  carried  out  according  to the  Seller's  instructions,  lack  of  trained
personnel for maintenance,  operation above rated capacities either  intentional
or otherwise,  or in an otherwise  improper  manner or physical damage caused by
persons  other than  employees or agents of the Seller;  that the Seller's  sole
liability  under valid  warranty  regarding  claims for defects in material  and
workmanship is limited, at the option of the Seller, to repair or replacement of
the defective parts; that with respect to components purchased by the Seller for
incorporation into the Supplies  essentially  without  modification,  the Seller
makes no  warranties  of its own but  assigns  to the  Buyer  the full  warranty
extended to the Seller as part of the original purchase of the component.

If, due to a fault of the Seller,  the Supplies  have not passed the  Acceptance
Tests by _______________,  the  Seller's  warranty  shall start and be in effect
until ______________.


<PAGE>


The Seller  shall  bear the cost and risk of loss  during  transport  of (i) any
defective  part or components  being  returned to the Seller's  factory with the
Seller's  agreement and (ii) any repaired or replacement  item being returned to
the Buyer.  Products or parts returned without the agreement of the Seller shall
be at the Buyer's  sole risk and expense.  The Seller  shall bear any  personnel
costs incurred in connection  with the  fulfillment of the Seller's  obligations
under this warranty.

The foregoing warranties are exclusive and are given and accepted in lieu of all
other warranties of quality written or oral,  express or implied,  and all other
warranties are hereby disclaimed.


15. Logging of Operations

The Buyer shall keep a logbook of operation  for the  Supplies.  In this logbook
shall be  documented  all  sessions of  operation of the Supplies as well as any
problems  encountered  during  operation of the Supplies.  If the Buyer requests
assistance  from the Seller in  resolving a problem  with the  Supplies  and the
information in the log is relevant to this resolution, the Buyer may at its sole
discretion  make the log available to the Seller . If the Buyer presents a claim
against the  warranty  provided  by the  Seller,  a copy of the log must be made
available to the Seller.  It is  understood  by the Seller that the  information
contained in the Log may be of a proprietary  nature and is therefore covered by
the confidentiality agreement between the parties.


16. Training

The Seller agrees to provide up to two days of training in __________ operation,
preventative  maintenance and repair to the Buyers' personnel at the Site during
or immediately after the installation  period, with the exact dates and times to
be mutually  agreed by the Buyer and Seller.  The cost of such training shall be
the responsibility of the Seller.


17. Disclaimer of Liability for Personal Injury

The Seller and the Buyer hereby acknowledge that the products,  as offered,  are
highly sophisticated devices which should be operated only by trained personnel;
that it is the Buyer's  sole  obligation  to retain and train such  personnel or
have it trained, possibly by the Seller; that, where necessary, the Supplies

<PAGE>


contain  interlocking  devices  designed to prevent their  operation in a manner
which  would  cause  injury  to such  personnel,  but as in the  case  with  all
equipment  utilizing  high  voltages,  such  personnel  should  assume  that the
interlocking  devices are  inoperative and should take  appropriate  measures to
ensure that the voltage  has been turned off prior to begin  working  where high
voltage is present during the start up and/or operation of the Supplies; that it
is inherent in the  operation of the  Supplies  that  portions  thereof may emit
dangerous  ionizing  radiation  and may become  activated  during  their  normal
operation;  that it is the Buyer's sole  obligation  to  determine  the level of
radioactivity,  to ensure that a system exists for determining and recording the
levels of  radioactivity  and to ensure that no personnel  or other  persons are
exposed to radiation in excess of that permitted by relevant law or regulations.

Based upon the  foregoing  acknowledgments,  it is,  therefore,  agreed that the
Seller shall not incur any  liability  for personal  injury to any party arising
out of the operations and  maintenance of the Supplies  unless such liability is
solely  caused by a gross  negligence  on the part of the Seller in the  design,
implementation  or  documentation  including but not limited to maintenance  and
operation manuals for the Supplies. In order to give effect to these limitations
of the Seller's liability, and as an express condition of sale, the Buyer hereby
agrees to indemnify and hold the Seller  harmless  from any and all claims,  but
limited by the  exclusion  of  negligent  acts or  omissions  as outlined in the
preceding sentence, damages and liability, including reasonable attorney's fees,
arising  out of a claim  against the Seller for  personal  injuries of any party
occasioned by the operation and/or maintenance of such Supplies.


18. Liability for Consequential Damages

The Seller's  liability to the Buyer for damages howsoever caused shall under no
circumstances  whatsoever  (including  the decision of an  arbitration  panel or
court of law)  exceed  the  payments  actually  received  by the  Seller for the
Supplies  and the Seller shall under no  circumstances  have any  liability  for
special,  incidental,  indirect  or  consequential  damages,  including  without
limitation liability for loss of use, loss of profits, damage or injury to other
property or persons.



<PAGE>



19.  Infringement of Proprietary Rights

a) The Seller shall  indemnify  and hold  harmless the Buyer against any and all
losses,  liabilities  and  expenses,  by reason of any third party claim,  suit,
action or proceeding for alleged  infringement  of any  copyright,  trademark or
patent  of the  Buyer's  Country  or  alleged  conversion  of any  trade  secret
resulting from or arising in connection with the manufacture,  installation, use
or sale of the Supplies or any part thereof  including  any and all judgments or
decrees which may be rendered against the Buyer (and reasonable  attorney's fees
if Seller  should  fail to defend as  provided  in  subsection  b)  hereof,  and
settlements  made  arising out of any such  claim,  suit,  action or  proceeding
provided,  however  that this  indemnity  shall not  extend to any  infringement
resulting  from a breach  by the  Buyer  of this  Agreement  or of the  Seller's
instructions for the operation of the Supplies.  The Seller shall however not be
liable for any  infringement  or claim based upon the use of the Supplies or any
portion of the  documentation  in combination with other equipment or technology
not supplied by the Seller or resulting from any modification made by the Buyer,
without approval or instruction by Seller.

b) The Seller shall defend at its own expense all suits,  actions or proceedings
brought  against the Buyer with respect to the matters  listed in  subsection a)
above. The Buyer shall have the right at its option and at its sole expense,  to
participate  in the  defense  of any such  claim,  suit,  action or  proceeding,
without  relieving  the  Seller of any  obligation  hereunder.  The Buyer  shall
promptly  notify the  Seller in writing  after any such claim is made or suit is
brought and shall  cooperate with Seller in the defense  thereof as requested by
the Seller,  and the Seller  agrees to  reimburse  the Buyer for its  reasonable
out-of-pocket  expenses incurred at Seller's specific request in connection with
such  cooperation.  The  Buyer  shall  immediately  notify  the  Seller  of  any
infringement  claim made or  threatened  and shall refrain from any admission of
liability,  and will not  negotiate  or enter into any  settlement  without  the
Seller's prior consent.

c) If,  however,  as a  consequence  of a final  determination  of any  suit for
infringement  or any court decision  involving any injunction  resulting from or
arising in connection  with the  manufacture or sale of the Supplies or any part
thereof furnished or employed by the Seller hereunder,  the Buyer is enjoined or
limited  in any  material  manner in the use of said  Supplies  or part,  Seller
shall,  at its option and at its own expense either i) procure for the Buyer the
right to continue use of said Supplies or part, ii) so modify the Supplies or

<PAGE>


part so as to render them  non-infringing  without any significant effect to use
thereof, or iii) replace the Supplies or part with an equivalent  non-infringing
product.


20. Seller's and Buyer's Proprietary Information

Upon completion of the Acceptance  Tests,  the Seller shall furnish to the Buyer
free of charge  information,  manuals  and  drawings  in English and with metric
units of measure  relating  to the  Supplies  and  instructions  to the Buyer in
sufficient  detail to enable the Buyer and its employees to operate,  calibrate,
maintain and repair the Supplies and all parts thereof.  A definitive version of
the documentation,  including the modifications that are specific to the Buyer's
configuration and that are made during the final stages of installation, will be
provided six (6) months after the  completion  of the  Acceptances  Tests.  Such
information,  manuals,  drawings  and  instructions  and the  written  materials
furnished  by the Seller to the Buyer  under the Section  entitled  "Preparatory
Work"  hereof shall remain the property of the Seller and the Buyer shall have a
royalty-free  license  to  use  the  same  in  connection  with  the  operation,
calibration, maintenance and repair of the Supplies. The Buyer shall not use any
of the proprietary information supplied by the Seller for any other purpose than
the operation, calibration, maintenance and repair of the Supplies and the Buyer
shall not register, apply for registration or attempt to acquire any other legal
protection  for the said  proprietary  information in its own name, or any other
name,  or take any  action  which may  affect  the  Seller's  rights,  title and
interest in and to the  technology in any country,  without  obtaining the prior
consent of the Seller.  The Buyer shall treat such  information and materials in
the same  manner  as it  treats  its own  proprietary  information  and will use
similar  means to  protect  it from  unauthorized  disclosure.  The  same  Buyer
covenants and agrees that the contents of such written  information or materials
shall  not be  divulged  to any other  person,  firm or  corporation,  except as
allowed above.

The Seller agrees that all  information  transmitted  from Buyer to Seller under
this contract  including but not limited to,  information  relating to research,
development, manufacturing, testing, accounting and marketing will be considered
confidential  information.   This  confidential  information  will  be  held  in
confidence and not disclosed to third parties by the Seller.  This  confidential
information  shall be held in  confidence by the Seller using the same degree of
care as the Seller uses in  protecting  its own  confidential  information.  The
Seller shall only use such  confidential  information for the purpose of meeting
its obligations under this Agreement.



<PAGE>



21. Destruction of Supplies

In the event that prior to the delivery of the Supplies,  the Supplies are lost,
destroyed  or  damaged  to such an extent  that  they  cannot  be  repaired  and
delivered  in  accordance  with the  delivery  schedule set forth in the Section
entitled "Installation of Supplies",  provided the event is not a willful act of
the Seller, the time reasonably  required by the Seller to furnish a replacement
for the  Supplies or to  accomplish  such  repairs  shall be deemed an Excusable
Delay under the Section entitled  "Excusable  Delay" and the Seller shall not be
deemed to be in default or to have breached its duties hereunder.



22. Excusable Delay

Notwithstanding anything to the contrary herein contained, if the performance of
this  Agreement  by any  party  or the  obligation  of any  party  hereunder  is
prevented,  restricted  or  interfered  with by reason of : i) fire,  explosion,
strike,  lockout,  labor  dispute,  casualty  or  accident,  epidemic,  cyclone,
drought,  flood or ii) war,  revolution,  riot, civil commotion,  acts of public
enemies,  blockage  or  embargo,  or iii) any law or  proclamation,  regulation,
ordinance, demand or requirement of any applicable government or any subdivision
thereof  or  representative  of any  such  government,  or iv)  any  other  acts
whatsoever,  whether  similar  or  dissimilar  to those  enumerated,  beyond the
reasonable  control of a party  hereto,  then,  and in that event,  the party so
affected  shall  promptly  notify the other  party of all  reasonable  resulting
difficulties.  Upon such notice,  the disabled party shall,  for the duration of
its disability (referred to as "Excusable Delay" in this Agreement),  be excused
from the performance of such of its obligations as are prevented, restricted, or
interfered  with  by  reason  of the  occurrence  of any  of  the  events  above
enumerated  and such  party  shall  not be deemed to be in  default  under  this
Agreement  nor be subject to any  liability  or damage.  The time period  during
which any party is to perform  under this  Agreement  shall be  extended  by the
period of any Excusable Delay. Excusable Delay under the same terms occurring in
respect to the Seller's  sub-contractors  shall be deemed to be Excusable  Delay
occurring to the Seller.

If the Seller is prevented from proceeding according to any of the schedules set
out in this Agreement by the Buyer's fault, by a delay on the part of the Buyer,

<PAGE>


or by regulatory body with  jurisdiction  over the Buyer's site, or if the Buyer
delays a payment or the issuance of a Letter of Credit  pursuant to Section 3 by
more than fifteen (15) days past the due date,  then all the dates  contained in
this  Agreement  for  completion  by the Seller of its  obligations  and rights,
including but not limited to the right to exercise the accelerated  delivery and
acceptance  option,  shall be  postponed  by an  additional  period equal to the
delay.


23. Termination for Insolvency

In the event that either the Buyer or the Seller :

a) makes a general assignment for the benefit of creditors or becomes insolvent;

b) files an insolvency petition in bankruptcy ;

c) petitions for or acquiesces in the  appointment  of any receiver,  trustee or
similar officer to liquidate or conserve its business or any substantial part of
its assets ;

d) commences,  under the laws of any jurisdiction,  any proceeding involving its
insolvency,  bankruptcy,   reorganization,   adjustment  of  debt,  dissolution,
liquidation  or any other  similar  proceeding  for the  release of  financially
distressed debtors ; or

e) becomes a party to any proceeding or action of the type described above in c)
or d) and such proceeding or action remains undismissed or unstayed for a period
of more than sixty (60) days,


then the other party may, by written notice, terminate this Agreement.


24. Spare Parts

The Seller agrees to make available to the Buyer,  as the Buyer may from time to
time require,  _____________________ spare parts and components to the Supplies,
and the Seller agrees to exert  reasonable  efforts to meet the Buyer's delivery
requirements  for said parts and  components  or acceptable  substitutes.  It is
understood  that the  parties  shall  negotiate  in good  faith  reasonable  and
mutually agreeable prices for said spare parts and components.



<PAGE>



25. Technical Assistance by the Seller

Immediately  following the  successful  completion of the  Acceptance  Tests the
Seller  shall send one of its  specialists  to assist the Buyer in bringing  the
cyclotron to full  operational  capacity.  The  specialist  shall be the project
coordinator  or, if he is not  available,  someone of equal or better  technical
expertise,  this other person to be approved by the Buyer,  such approval not to
be unreasonably  withheld. The Seller's specialist will remain at the site for a
period of 28 days unless the Buyer  agrees that the  services of the  specialist
are no longer required.  During this period,  the Buyer's specialist will define
the tasks to be  performed  by the  Seller's  specialist  with the  objective of
verifying  the  cyclotron  1) is fully  operational,  2) performs  according  to
specifications  within the production  environment and 3) its automated  control
system performs according to specifications. This period of technical assistance
does not relieve the Seller of any of its warranty  obligations,  including  the
requirement  that the Seller  send any  personnel  required  to the Site to make
repairs  should the  Supplies  be found to not meet  specifications  during this
period.


26. Entire Agreement

This Agreement,  made in two originals,  one for each party, contains the entire
agreement  between the parties and shall  supersede all previous  communications
and  agreements,  whether oral or written,  with  respect to the subject  matter
hereof and the provisions  hereof may not be modified or superseded except by an
instrument in writing signed by a duly authorized  officer or  representative of
each of the parties hereto.


27. Authorization

By virtue of having  affixed  their  respective  signatures  below,  each of the
parties  hereto  warrants  that it has obtained all  authorization  necessary to
enter into and perform its obligations under this Agreement.


28. Effective Date

This Agreement  shall become  effective as of the date upon which payment i), as
set forth in Section entitled  "Purchase Price of the Supplies",  is received by
the Seller.



<PAGE>



29. Disputes

With respect to any  controversy  arising out of or relating to this  Agreement,
such controversy shall be settled by final and binding  arbitration in New York,
NY,  USA,  in  accordance  with the  then-existing  rules (the  "Rules")  of the
American Arbitration Association ("AAA") and judgment upon the award rendered by
the  arbitrators  may be  entered  in any  court  having  jurisdiction  thereof;
provided,  however,  that the law applicable to any  controversy  and the law by
which this  Agreement  shall be construed  and governed  shall be the law of the
State  of New  York,  regardless  of its or  any  jurisdiction's  choice  of law
principles.  In any  arbitration,  pursuant  to this  Agreement,  the  award  or
decision  shall  be  rendered  by a  majority  of  the  members  of a  Board  of
Arbitration  consisting of three (3) members,  one of whom shall be appointed by
each  party  and the  third of whom  shall be the  Chairman  of the panel and be
appointed by mutual agreement of said two  party-appointed  arbitrators.  In the
event of failure of said two  arbitrators  to agree upon the  appointment of the
third  arbitrator   within  sixty  (60)  days  after  the  commencement  of  the
arbitration  proceeding,  the third  arbitrator shall be appointed by the AAA in
accordance  with the Rules. In the event that either party shall fail to appoint
an arbitrator  within thirty (30) days after the commencement of the arbitration
proceeding,  such arbitrator and the third  arbitrator shall be appointed by the
AAA in  accordance  with the  Rules.  The  Rules of  Evidence  and the  Right to
Discovery shall be applicable to both parties.

Work under this Agreement shall continue during the arbitration  proceedings and
payments due to the Seller shall not be withheld on account of such  proceedings
unless such  particular work or payment is the subject matter of the arbitration
in which case this provision shall not apply to such particular work or payment.

The parties agree to equally share the expenses associated with this arbitration
procedure.


30. Governing Laws

This Agreement  shall be governed by and construed in all respects in accordance
with the laws of the State of New York, USA.



<PAGE>



31. Notices

a) Any notice  given under this  Agreement  shall be made in  writing,  shall be
given by first class air mail,  telex,  telecopier or commercial cable and shall
be addressed to :

In the case of the Seller:
      Ion Beam Applications
      Chemin du Cyclotron, 3
      1348 Louvain-la-Neuve
      Belgium
      Attn : Mr. Yves Jongen
      Fax Number : 32-10-47.58.10

In the case of the Buyer :
      Theragenics Corporation
      5325, Oakbrook Parkway
      Norcross, GA 30093
      USA
      Attn : Mr. Glenn Dill
      Fax Number : 1 (404) 381 84 47

Either party,  by written  notice to the other,  may change the address to which
notices will be directed.

b) Any notice shall be deemed given on the date personally  delivered or sent by
telex,  telecopier or cable and fifteen (15) days after the date of mailing,  if
mailed.


32. Project Coordinator

Upon signing this Agreement,  both parties shall designate a representative  who
will act as Project  Coordinator  and official  addressee for all  communication
resulting from this  Agreement,  other than any official  notice given under the
Section  entitled   "Notices".   All  requests  for  service,   transmittals  of
information,  reports on training  activity,  and other  communication  required
under this  agreement  shall be sent by and directed to the  respective  Project
Coordinators. Informal conversations occurring person-to-person or by phone,

<PAGE>


requests and  information  shall be validated by an appropriate  written form as
confirmation.  Any communication sent to others than those designated as Project
Coordinators,  or in a  manner  not in  accordance  with the  Notices  procedure
specified in this Agreement will be considered as informal and non-existent.


33. Assignment

This  Agreement  shall inure to the  benefit of and be binding  upon each of the
parties hereto and their  respective  successors and assignees,  but neither the
rights nor the duties of either party hereunder may be assigned,  in whole or in
part by either party, without the prior written consent of the other party. Such
consent shall not be unreasonably withheld by either party. Any assignment shall
not relieve the assignee of any of the Agreement obligations of the assignor.


34. Headings

The headings  contained  within this  Agreement are  established  solely for the
convenience  of the  two  parties  and  are not  intended  to and do not  limit,
construe or modify any of the terms and conditions included hereof.


35. Severability

If  any  term  or  provision  of  this  Agreement  is  held  to  be  illegal  or
unenforceable, then this Agreement, except for such part or parts thereof, shall
continue to be in full force and effect.

In the event of any  inconsistency  between a provision of the conditions of the
Agreement and the content of an Appendix to this  Agreement,  and if the parties
cannot  agree on the  clause to take  precedence,  the AAA of Section 29 will be
asked to  mediate/arbitrate  the dispute  and the parties  agree to abide by the
finding of said association.



36.  Non-Waiver

The failure by either party to enforce at any time or for any period of time any
of the  provisions  hereof shall not be a waiver of such  provisions  nor of the
right of such party thereafter to enforce each and every such provision.


<PAGE>


IN WITNESS  WHEREOF,  the parties  have caused this  Agreement to be executed in
duplicate by their duly qualified officers or representatives.

THERAGENICS CORPORATION Inc.

Not Required
Christine Jacobs
President

/s/ Bruce Smith                                      /s/ Glenn Dill
Bruce Smith                                          Glenn Dill
Chief Financial Officer

/s/ Yves Jongen                                      /s/ Sabine de Voghel
Yves Jongen                                          Sabine de Voghel
President                                            Area Sales Manager




<PAGE>


                                    APPENDIX

                              CYCLOTRON PARAMETERS

<PAGE>






                                    APPENDIX




<PAGE>


                                    APPENDIX

                              BUILDING REQUIREMENTS

<PAGE>






                                    APPENDIX

                       BUILDING COMPLETION SPECIFICATIONS


<PAGE>








                                    APPENDIX
                              INCLUDED SPARE PARTS


<PAGE>


                                    APPENDIX

                               ACCEPTANCE CRITERIA


<PAGE>


                                    APPENDIX

                                ACCEPTANCE TESTS


<PAGE>


                                    APPENDIX

                   ACCELERATED DELIVERY AND ACCEPTANCE OPTION




The Buyer has the option to  request  to the  Seller,  at any time  during  this
Agreement,  to work on an  accelerated  schedule  basis  in  order  to have  the
Supplies accepted at an earlier date than the scheduled acceptance date of _____
_______.  Official request must be made in writing and addressed to Yves Jongen,
President of IBA.

In the case the Buyer  exercises  this option,  the Buyer will pay the Seller an
additional  sum of  _________  for each  complete day between the actual date of
early acceptance and __________ including the day of __________.


                                EXHIBIT 10.23(c)

                               Purchase Agreement
                                     between
                             Theragenics Corporation
                                       and
                           Ion Beam Applications s.a.
                                      dated
                                December 27, 1996


Confidentialportions of this  document have been blanked out and have been filed
            separately with the Securities and Exchange Commission.

<PAGE>










                               Purchase Agreement

                                     between

                          Theragenics Corporation Inc.

                                       and

                           Ion Beam Applications S.A.

                                       for

                       _______________ Cyclotron Number 7

                                       and

                            Related Target Equipment








<PAGE>


                                Table of Contents

Purchase Agreement

1.  Interpretation............................................................3
2.  Subject Matter of Sale....................................................4
3.  Purchase Price of the Supplies............................................5
4.  Title and Risk of Loss....................................................7
5.  Delivery..................................................................7
6.  Installation of Supplies..................................................7
7.  Preparatory Work..........................................................9
8.  Acceptance...............................................................11
9.  Transportation and Insurance.............................................13
10. Export Documents, Duties and Foreign Taxes...............................14
11. Customs Duties, Buyer's Country Taxes and Import Permits.................14
12. Warranty As To Title.....................................................14
13. Design and Performance Warranty..........................................15
14. Material and Workmanship Warranty........................................15
15. Logging of Operations....................................................16
16. Training.................................................................16
17. Disclaimer of Liability for Personal Injury..............................16
18. Liability for Consequential Damages......................................17
19. Infringement of Proprietary Rights.......................................17
20. Seller's and Buyer's Proprietary Information.............................19
21. Destruction of Supplies..................................................20
22. Excusable Delay..........................................................20
23. Termination for Insolvency...............................................21
24. Spare Parts..............................................................21
25. Technical Assistance by the Seller.......................................21
26. Entire Agreement.........................................................22
27. Authorization............................................................22
28. Effective Date...........................................................22
29. Disputes.................................................................23
30. Governing Laws...........................................................23
31. Notices..................................................................23
32. Project Coordinator......................................................24
33. Assignment...............................................................25
34. Headings.................................................................25
35. Severability.............................................................25
36. Non-Waiver...............................................................25

Appendices

Cyclotron Parameters
_______________________________
Building Requirements
Building Completion Specifications
Included Spare Parts
Acceptance Criteria
Acceptance Tests
Accelerated Delivery and Acceptance Option



<PAGE>


                               Purchase Agreement


AGREEMENT  made as of this 27th day of  December  1996 by and  between  ION BEAM
APPLICATIONS,  S.A., a corporation  organized under the laws of Belgium,  having
its principal  office at Chemin du Cyclotron 3, 1348  Louvain-la-Neuve,  Belgium
(hereinafter  called the "Seller",  which expression includes its successors and
permitted assignees) and THERAGENICS CORPORATION, having its principal office at
5325 Oakbrook  Parkway,  Norcross,  Georgia 30093, USA  (hereinafter  called the
"Buyer", which expression includes its successors and permitted assignees).

WITNESSETH :

WHEREAS, the Seller wishes to sell to the Buyer and the Buyer wishes to buy from
the  Seller,  the  Seller's  model  _____________  cyclotron,   related  _______
equipment and spare parts therefore, all as more particularly described herein :
and

WHEREAS,  the Buyer wishes the Seller to assemble,  install,  start up, test and
make operational the ______________  cyclotron to be purchased including related
equipment and the Seller is willing to undertake this task : and

NOW, THEREFORE,  in consideration of the mutual covenants herein contained,  the
parties hereto agree as follows :


1. Interpretation

In this Agreement, unless the contrary intention appears :

"Acceptance" means the process whereby the Seller demonstrates to the Buyer that
the Supplies provided meet the requirements of the Agreement. This process shall
consist of a series of tests,  the  "Acceptance  Tests" as  defined in  Appendix
"Acceptance   Tests",   which  demonstrate  the  Supplies  meet  the  guaranteed
specifications, the Acceptance Criteria.


<PAGE>


"Acceptance  Criteria"  mean the  guaranteed  specifications  of the Supplies as
defined in Appendix "Acceptance Criteria".

"Acceptance  Date"  means the date on which the Buyer  agrees  that based on the
Acceptance  Tests, the Supplies have met the Acceptance  Criteria . The Supplies
shall be deemed  accepted  when the Buyer and Seller  agree in writing  that the
Acceptance Tests have been successfully completed.

"Acceptance Tests" are the tests listed in Appendix "Acceptance Tests".

"Agreement" means this document and includes its Appendices.

"Buyer's Country" means the country where the Site is located.

"Day" means calendar day;  "Week" means  calendar  week;  "Month" means calendar
month.

When the last day of any period  prescribed  for the execution of any assignment
falls on a day which is not a working day in Belgium or in the Buyer's  Country,
the  assignment  may be  performed  on  the  first  working  day  following  the
aforementioned day.

"Effective Date" has the meaning set forth in Section entitled "Effective Date".

"Excusable  Delay"  has the  meaning  set forth in Section  entitled  "Excusable
Delay".

"Site" means the Buyer's facility in Buford, Georgia, USA.

"Supplies" means all equipment,  hardware, software (including installation) and
the  associated  documentation,  support  equipment  and services to be provided
under the Agreement, as detailed in Appendix "Cyclotron Parameters" and Appendix
"_______________________ ".



<PAGE>



2. Subject Matter of Sale

Subject to the terms and conditions of this Agreement :

a) The Seller  shall sell and deliver to the Buyer and the Buyer shall  purchase
from the Seller (i) a __________________ cyclotron, the technical specifications
of  which  are more  fully  described  in the  Appendix  "Cyclotron  Parameters"
Appendix hereto; (ii) _______________________,  the technical  specifications of
which are more fully  described  in the Appendix  "____________________________"
hereto;  and (iii) a set of spare parts listed in the Appendix  "Included  Spare
Parts" hereto;

b) The Seller shall also assemble, install, start up, test, make operational and
perform the Acceptance Tests on the Supplies.

c) The  Seller  shall  send one of his  specialists  to assist in  bringing  the
cyclotron to full  operational  capacity after Acceptance of the Supplies by the
Buyer, as described in Section 25.

d) The Buyer and  Seller  agree  that an option  for  accelerated  delivery  and
acceptance as described in Appendix "Accelerated Delivery and Acceptance Option"
may be  exercised  by the Buyer.  In case that option is exercised by the Buyer,
the covenants of the "Accelerated Delivery and Acceptance Option" Appendix shall
be applicable to both parties.


3. Purchase Price of the Supplies

a) The  aggregate  purchase  price  (hereinafter  the "Price") of the  Supplies,
including  packaging,  insurance and transportation of the Supplies to the Site,
the  assembly,  testing and start up of the  Supplies  described  in the Section
entitled  "Subject  Matter  of  Sale"  above,   shall  be   ____________________
________________________________.  This price shall also  include the  technical
assistance  by the Seller as  described in Section 25, the Spare Parts as listed
in  Appendix  "Included  Spare  Parts"  and  the  Seller's  contribution  to the
applicable USA customs duty as stated in Section 11 of this Agreement.

b) As a down payment  equivalent to  ____________  has been made by the Buyer to
the Seller on November 6, 1996, the balance of the Price set forth in subsection
a) shall be payable as follows:


<PAGE>


     i)  ____________________________________________________________________ to
be paid to the Seller upon execution of this Agreement;

     ii) ____________________________________________________________ to be paid
to the  Seller  on  March 1,  1997.  This  payment  shall  be  guaranteed  by an
irrevocable  standby  letter of credit to be issued in favor of and  approved by
the Seller within one month from the Effective Date.

     iii)_____________________________________________________________   to   be
paid to the Seller on January 1, 1998.  This payment  shall be  guaranteed by an
irrevocable  standby  letter of credit to be issued in favor of and  approved by
the Seller by March 1, 1997.

     iv) _________________________________________________________ to be paid to
the Seller  within 15 days from shipment of the Supplies as evidenced by receipt
of the  shipping  documents  and no later than June 1, 1998 if the  shipment  is
delayed by Buyer's  fault.  This payment shall be  guaranteed by an  irrevocable
standby  Letter of Credit to be issued in favor of and approved by the Seller by
the date of shipping of the  Supplies,  to be notified by Seller to the Buyer at
least 30 days in advance.

     v)  _________________________________________________________ to be paid to
the Seller within 15 days of the Acceptance of the Supplies.  This payment shall
be guaranteed by an  irrevocable  stand-by  Letter of Credit,  which can only be
exercised  during  the  year  following  the  delivery  of  the  Supplies,   and
conditioned  only  upon  successful  completion  of  the  Acceptance  Tests  and
providing  further  that,  in the event the Seller is  prevented  by the Buyer's
fault,  by a delay  on the  part of the  Buyer,  or by a  regulatory  body  with
jurisdiction over the Buyer from completing the Acceptance Tests for a period of
sixty (60) days or more,  payment  thereunder  to the Seller  shall be made upon
demand of the  Seller.  This  Letter  of Credit  shall be issued in favor of and
approved by the Seller,  such approval not to be unreasonably  withheld,  by the
date of  shipping  of the  Supplies,  to be notified by Seller to Buyer at least
thirty days in advance.

c) All  payments  by the Buyer to the Seller  under this  Agreement  shall be in
Belgian Francs and,  except those  specified in paragraph 3. b) above,  shall be
made by wire transfer within thirty (30) days from the date of invoice.


<PAGE>


d) All  payments  by the Buyer to the Seller will be deemed to have been made by
the Buyer on the date on which  the  Seller  has been  credited  for the  proper
amounts.  Any payment due to the Seller  which is not paid on the due date shall
accrue  interest for each started  month of delay at an annual rate of one point
above  the rate of the  "Avance  en Compte  Courant  Hors  Plafond  de la Banque
Nationale de Belgique" as published in "l'Echo" on the first day of such month.


4. Title and Risk of Loss

Except as indicated  below in this  paragraph,  title to the  Supplies  shall be
transferred  from the Seller to the Buyer when and to the  extent  payments  are
received by the Seller.  The Buyer  represents  and  warrants  that it shall not
cause or permit to be caused  any lien or  encumbrance  of any kind to be placed
upon the  Supplies  to an  extent  greater  than its share of  ownership  in the
Supplies.  It is  understood  that if the  Seller is unable to  demonstrate  the
Supplies  meet  the  Acceptance  Criteria  within  one year of  delivery  of the
Supplies to the Buyer's Site, clear title to the Supplies transfers to the Buyer
without  obligation to pay to the Seller the final payment  specified in Section
3.b.v unless the Seller has been prevented from conducting the Acceptance  Tests
as described in Section 8, last paragraph.

Risk of loss of any part of the Supplies shall pass from the Seller to the Buyer
upon delivery of such parts to the Site.


5. Delivery

The  Seller  shall  deliver  the  Supplies  to the Buyer at the Site and set the
Supplies in their final location.


6. Installation of Supplies

a) The assembly and  installation of the Supplies at the Site and the Acceptance
Tests are planned to be completed by _____________________________________ after
completion  of  Site  preparation  by  the  Buyer  at  the  Seller's  reasonable
satisfaction  as  evidenced  by  an  acceptance  document  of  the  Site  ("Site
Acceptance  Document")  signed by the  Seller,  whichever  is later.  The Seller
undertakes to make its best efforts to complete the installation and testing

<PAGE>


within this period.  During the  installation  period the Buyer shall permit the
Seller's  employees,  subcontractors  or  agents  unlimited  access  to the Site
provided said  individuals  comply with policies and procedures  established for
the Buyer's employees regarding such matters as health and safety issues.

b)  With  reasonable  notice  to  the  Seller,  the  Buyer  and  its  authorized
representatives  shall,  during reasonable working hours, be free to inspect the
quality and  conditions of the Supplies at the Seller's site during  fabrication
and at any time upon arrival of the same at the Site and during the installation
period.  The Seller will notify in writing to the Buyer when the major materials
are available for construction of the cyclotron.

c) The Buyer at its sole expense shall  provide the Seller with closed  premises
on or reasonably  near the Site in which the Seller may store employee  clothing
and tools and equipment required for the installation.  However,  the Buyer does
not assume any risk with respect to the loss or theft of any such items while on
the Buyer's premises.

d) The Buyer shall,  at its sole expense,  provide the Seller with the following
utilities  required for installation of the Supplies and Acceptance Tests on the
Supplies:  electricity,  water,  compressed  air,  dry  nitrogen for venting the
vacuum  chamber,  hydrogen  gas for the ion  source,  as  described  in Appendix
"Building Requirements".  Access to telephone and fax equipment connected to the
international network is required and the Seller will pay the charges associated
with the use of this line.  The Buyer shall provide all the necessary  radiation
measuring  equipment  required for the operation and the Acceptance Tests on the
Supplies.

e) Within  fifteen  (15) days from the date of delivery of the  cyclotron at the
Site, the Buyer shall permit the Seller to produce beams at full energy and full
intensity in the cyclotron vault.

f) The Price  reflects labor  provided by the Seller.  Any  additional  labor or
costs  required by local labor codes,  etc.  will be the  responsibility  of the
Buyer.

g) The Supplies are manufactured  according to Belgian technical  standards.  If
the Buyer requires compliance of the Supplies with specific technical standards,
these  technical  standards  must be notified by the Buyer to the Seller  within

<PAGE>


seven weeks of the Effective  Date. All  additional  costs related to making the
Supplies  conform to those norms or specific  standards  shall be charged to the
Buyer.


7. Preparatory Work

a) The Buyer shall have the sole  responsibility,  at its sole expense,  for the
work required to prepare the Site for installation of the Supplies. The building
to house the Supplies and the systems  contained  therein  shall comply with the
specifications   detailed  in  Appendix  "Building  Requirements"  and  Appendix
"Building Completion Specifications". As soon as possible after completion, and,
at the  latest,  on_____________,  the  Seller  shall  prepare  for the  Buyer a
proposed  layout and prepare such other plans and  memoranda as are necessary to
transmit data to the Buyer's  architects and engineers.  By  __________________,
the Buyer shall furnish to the Seller  drawings and plans for the Site including
the  building  and  systems  detailed in Appendix  "Building  Requirements"  and
Appendix "Building Completion Specifications" in sufficient detail to enable the
Seller to judge whether the Site will be satisfactory  for the Supplies and will
meet  the  specifications  detailed  in  Appendix  "Building  Requirements"  and
Appendix  "Building  Completion  Specifications".  Within  four (4) weeks of the
receipt of this initial set of architectural and engineering drawings and plans,
the  Seller  shall  provide  the  Buyer  with  comments   thereon  and  detailed
information  as to such  modifications  therein  as the Seller  deems  necessary
including such drawings and technical  documents as may be required by the Buyer
to complete the  installation  of the cables,  cooling water and  compressed air
systems.  However,  the time  devoted to  preparation  by personnel of Seller of
additional  layouts or drawings and/or reviews of revised sets of  architectural
and  engineering  drawings  will be  invoiced  at  Seller's  regular  rates.  No
additional charge will be made for telephone  consultations.  Travel and related
expenses  incurred as a result of attendance by personnel of the Seller required
at  meeting  outside  of  Belgium  with  the  Buyer's   architects,   engineers,
consultants and/or representatives will be reimbursed by the Buyer. With respect
to the foregoing,  the  responsibility  for determining  whether conflict exists
between local building codes and/or other laws or government regulations and the
content of  drawings,  data sheets,  memoranda  or other forms of  communication
submitted  by  the  Seller  is  solely  the  responsibility  of the  Buyer,  his
architects,  engineers and/or consultants. The definitive drawings and plans for
the Site,  made in accordance  with the Seller's  comments and  recommendations,
will then be  furnished  by the  Buyer to the  Seller  by  ________________.  In
addition,   unless   otherwise   specified,   the  Buyer  shall  have  the  sole
responsibility  for the  design and  construction  of the  radiation  monitoring
systems, of the shielding required to

<PAGE>


prevent  radiation leakage and of the systems required to handle the disposal of
radioactive waste.

Any delay on the part of the Seller in meeting its  obligations  related to this
Section  by more  than ten (10)  days  will add a number  of days to the  period
provided for the  performance  by the Buyer equal to the number of days of delay
by the Seller.

b) Before  commencing  installation,  the Seller shall  inspect the Site and the
Buyer shall  submit to the Seller the Site  Acceptance  Document to be signed by
the Seller confirming that the preparatory work meets all the criteria set forth
in the Section entitled  "Installation of Supplies",  paragraph c) and d) and in
Appendix   "Building    Requirements"   and   Appendix   "Building    Completion
Specifications".   This   acceptance   document  only   indicates  the  Seller's
willingness to begin the  installation of the Supplies in the Buyer's  building.
It  does  not  discharge  the  Buyer  and  his  subcontractors  of any of  their
responsibilities   regarding  the  building.   The  Buyer  shall   complete  the
preparatory work at the Site by ____________. If the preparatory work as regards
the cyclotron vault is substantially completed before that date, the Buyer shall
accept  delivery  and/or  installation of the Supplies as soon as possible under
the applicable  laws and  regulations.  In the event that such work has not been
completed  before that date,  or if for any other  reason the Buyer is unable to
accept delivery of the Supplies or commencement of the  installation  thereof by
that date,  the Buyer shall  immediately  give the Seller written notice of this
fact and the anticipated new date for completion of the preparatory work. In any
case,  the Seller may ship the  Supplies  to the Buyer at any time and the Buyer
shall store them in one of its warehouses until the date the preparatory work is
completed.

c) One week before  commencing  installation and setting of the cyclotron in its
vault,  the Buyer shall allow the Seller  full  access to the  cyclotron  vault,
power supplies and control room and all other rooms related to the  installation
of the Supplies to allow for the measurement of line-up marks to be performed.

d) The Buyer's completion,  to the reasonable satisfaction of the Seller, of its
undertakings  in this  section  and  elsewhere  in this  Agreement  relating  to
preparation of the Site and the continuous  furnishing of necessary services and
permits set forth in the Section entitled "Installation of Supplies",  paragraph
c), d) and e) and in Section entitled "Custom Duties,  Buyer's Country Taxes and

<PAGE>


Import   Permits"   and  the   requirements   detailed  in  Appendix   "Building
Requirements"  and  Appendix  "Building  Completion  Specifications"  shall be a
condition precedent to the Seller's commitment to perform within the time period
specified under the Section entitled  "Installation of Supplies" hereof, and any
delay or  interruption  by the  Buyer in  meeting  its  obligations  under  this
Agreement in a timely  fashion  shall extend the Seller's  time to perform under
this  Agreement  including  but not  limited to Seller's  time to  exercise  and
perform under the option for  accelerated  delivery and  acceptance  outlined in
Appendix  "Accelerated Delivery and Acceptance Option", by a period equal to the
period of the Buyer's delay or interruption plus, if shipment and/or delivery is
delayed by Buyer's  fault or at Buyer's  request,  an  additional  period not to
exceed four weeks to reschedule  shipment and/or delivery of the Supplies and/or
personnel as may be required.

In the event of any such delay or  interruption,  the Buyer will  reimburse  the
Seller for any  reasonable  costs  incurred as a direct  result of such delay or
interruption.  Additionally,  if such  postponement or  interruption  delays the
Buyer's  obligation  to make any of the payments  set forth in Section  entitled
"Purchase Price of the Supplies", paragraph b) hereof, interest will be computed
for each  started  month of delay at an annual  rate one point above the rate of
the "Avance en Compte  Courant Hors Plafond de la Banque  Nationale de Belgique"
as published in "l'Echo" on the first day of such month.

If all the  conditions  necessary  for the  Seller  to sign the Site  Acceptance
Document  referred  to in the  above  Section  have  not been met at the time of
delivery of the Supplies,  the Seller will  nonetheless make its best efforts to
start the  installation  of the Supplies as soon as reasonably  possible and the
Buyer will give the Seller any reasonable  support to allow the Seller to do so.
However,  beginning of installation of the Supplies in the building,  under such
conditions,  will under no circumstances be considered as implicit acceptance of
the Site by the Seller.


8. Acceptance

On the date set by the Seller for the conduct of the  Acceptance  Tests,  and in
the presence of the Buyer's  representatives,  the Seller shall begin to conduct
the agreed-upon Acceptance Tests.

Not more than twenty four (24) hours following the completion of such tests, the
Buyer shall either accept the Supplies as conforming to the requirements of the

<PAGE>


Agreement  by  issuing  an  acceptance  certificate   "Acceptance   Certificate"
acknowledging  that  decision,  or advise the Seller in writing of the extent to
which the Supplies do not meet the requirements of the Agreement.

The Buyer shall not withhold the issue of the Acceptance  Certificate on account
of minor omissions or defects in the Supplies which do not substantially  affect
their use but may designate in the Acceptance  Certificate such minors omissions
or defects. The Seller shall promptly make good these omissions or defects.

If the Buyer does not give notice within the period  stipulated above, or begins
using the  Supplies for its own use,  such tests shall be deemed  satisfactorily
completed,  the Acceptance  Certificate  shall be deemed issued on that date and
the related  acceptance  payment shall be paid to the Seller within 15 days from
that date.

If  the  Buyer   gives  the  Seller   notice  that  such  tests  have  not  been
satisfactorily  completed,  the  Seller  shall  make  such  adjustments  as  are
necessary  and  repeat  the   Acceptance   Tests  until  the  Buyer  deems  them
satisfactory pursuant to the terms set out above.

Until _____________,  the Seller shall have unimpeded  access to the Supplies to
complete the Acceptance Tests. If the Seller is unable to successfully  complete
the Acceptance Tests by _______________, the Buyer shall be free to begin use of
the  Supplies  forty five (45) days later.  Should the  Supplies be put into use
under this  condition,  it is  understood  the Buyer and Seller will make a good
faith effort to facilitate  the completion of the  Acceptance  Tests,  but it is
further  understood that the Buyer's production of Pd-103 with the machine takes
precedence.  The Buyer agrees to allow the Seller three (3) prescheduled days of
unimpeded    access   to   the    Supplies   per   month   during   the   period
between________________,   until  the  period  for  acceptance  has  expired  as
specified in Section 4 "Title and Risk of Loss".

If a dispute  arises  between  the Buyer and the Seller  concerning  whether the
Acceptance Tests have been successfully  completed or concerning the issuance of
the  Acceptance  Certificate,  the Buyer and the Seller  will  jointly  agree to
obtain the services of the American Arbitration Association ("AAA") to arbitrate
the dispute,  as described in Section 29  hereafter.  Both parties will abide by
AAA's recommendations.


<PAGE>


If the Seller is prevented  either by the Buyer or by any  regulatory  body that
has juridiction over the Buyer from conducting the Acceptance Tests for a period
of sixty (60) days,  the Buyer  shall be deemed to have  accepted  the  Supplies
sixty  (60) days  after the  Seller  was first  prevented  from  conducting  the
Acceptance  Tests. If the Seller is prevented by force majeure or events similar
to  those  enumerated  under  Section  "Excusable  Delay"  from  conducting  the
Acceptance  Tests, the Buyer shall pay 50% of the Acceptance  payment as defined
in Section 3 b) v). In either  case the Seller  shall  complete  the  Acceptance
Tests within the period remaining at the time the impediment began.


9. Transportation and Insurance

Seller shall at its own expense :

i) Obtain appropriate  property and liability  insurance covering loss or damage
to the Supplies  and  injuries to  individuals  during the  construction  of the
Supplies and during the  transportation  of the Supplies from the Seller's plant
to the Site.

ii) Pay all freight and other transportation charges associated with delivery of
the Supplies to the Site, and have a representative  present during the transfer
of the Supplies from the port of entry to the Site.

iii) Maintain worker's compensation insurance during the assembly,  installation
and testing of the  Supplies,  as  required  by  applicable  law,  covering  its
employees  and,  upon request  from Buyer,  provide a  certificate  of insurance
evidencing such coverage.

Buyer shall at its own expense:

i) Obtain appropriate  property and liability  insurance covering loss or damage
to the Supplies  between  delivery of the Supplies at the Site and the time when
the  Seller  has  been  paid in full  for the  amounts  under  Section  entitled
"Purchase Price of the Supplies". In such insurance policies, both the Buyer and
the Seller shall be named as insured parties.

ii) Arrange for the  destruction,  pick-up  and/or  clearing  away of all waste,
including the Supplies  packaging  except for the disposal of radioactive  waste
which is covered in section 12 of appendix "Building Completion Specifications".


<PAGE>


The Buyer and the Seller  shall each take out and  maintain at their own expense
during the period from receipt of the  Supplies at the Site through  Acceptance,
insurance to provide  coverage for both itself and the other party for an amount
of at least one million US dollars  (US$  1,000,000)  per  accident  against any
direct and indirect liability for bodily injury and death to individuals and all
direct or  indirect  costs,  losses  and  damages to the  property  of the other
arising  out of  each  other's  acts  or  omissions  in  unloading,  assembling,
installing and testing of the Supplies.


10. Export Documents, Duties and Foreign Taxes

The Seller will be  responsible  for obtaining all necessary  export  permits or
licences  relating  to the  Supplies  and the Buyer will  offer such  reasonable
assistance  in this regard as the Seller may  request.  The Seller shall pay any
and all export  duties and all other taxes  required  to be paid  outside of the
Buyer's Country in connection with the sale of the Supplies.


11. Customs Duties, Buyer's Country Taxes and Import Permits

The Buyer  shall pay all sales,  use,  gross  receipts,  excise and other  taxes
assessed  or levied by the  Buyer's  Country or any other  taxing  jurisdiction,
state or local,  within the Buyer's  Country,  against the Buyer  (including any
fines, penalties and interests thereof) as a result of or in connection with the
sale, use, delivery, storage or transfer of the Supplies.

The Seller agrees to equally share with the Buyer the cost of the import customs
duties levied by the customs authorities of the USA at the entry of the Supplies
into the USA, up to a maximum  cost for the Seller  equal to two percent (2%) of
the price of the Supplies.

The Buyer shall be responsible  for obtaining all necessary  permits or licences
with respect to the  importation of the Supplies in the Buyer's  Country and the
installation  and use of the Supplies at the Site, and the Seller will offer the
Buyer such reasonable assistance in this regard as the Buyer may request.



12.  Warranty As To Title

The Seller warrants good title to the Supplies.



<PAGE>



13. Design and Performance Warranty

The Seller hereby  warrants  that the Supplies  will perform in accordance  with
applicable  design  and  performance   specifications   set  forth  in  Appendix
"Cyclotron  Parameters"  and in  Appendix " " for a period of one (1) year after
the Acceptance  Date. The Seller shall resolve any design flaws appearing during
the first year following the Acceptance of the Supplies.


14. Material and Workmanship Warranty

The  Seller  hereby  warrants  that the  Supplies  will be free from  defects in
material  and  workmanship  for a  period  of one  (1)  year  from  the  date of
acceptance of the Supplies by the Buyer or fifteen (15) months from the date the
Supplies are put in their final  location in the Buyer's vault if the Acceptance
Date is delayed at the Buyer's  request or through the Buyer's fault,  whichever
period is shorter: provided,  however, that this warranty shall not apply to ion
source stamped cathodes and chimneys,  puller electrodes,  air filters, targets,
oil for the vacuum  pumps,  demineralizing  column,  gas bottles (H2 for the ion
source, N2 for  venting,...),  and other  consumables;  that the Seller makes no
warranty with respect to failures notified after the warranty period or failures
during operation without logging or failures due to alteration, misapplications,
abuse, abnormal conditions of temperature,  dirt, corrosive matter,  maintenance
not  carried  out  according  to the  Seller's  instructions,  lack  of  trained
personnel for maintenance,  operation above rated capacities either  intentional
or otherwise,  or in an otherwise  improper  manner or physical damage caused by
persons  other than  employees or agents of the Seller;  that the Seller's  sole
liability  under valid  warranty  regarding  claims for defects in material  and
workmanship is limited, at the option of the Seller, to repair or replacement of
the defective parts; that with respect to components purchased by the Seller for
incorporation into the Supplies  essentially  without  modification,  the Seller
makes no  warranties  of its own but  assigns  to the  Buyer  the full  warranty
extended to the Seller as part of the original purchase of the component.

If, due to a fault of the Seller,  the Supplies  have not passed the  Acceptance
Tests by _____________, the Seller's warranty shall start and be in effect until
__________________.


<PAGE>


The Seller  shall  bear the cost and risk of loss  during  transport  of (i) any
defective  part or components  being  returned to the Seller's  factory with the
Seller's  agreement and (ii) any repaired or replacement  item being returned to
the Buyer.  Products or parts returned without the agreement of the Seller shall
be at the Buyer's  sole risk and expense.  The Seller  shall bear any  personnel
costs incurred in connection  with the  fulfillment of the Seller's  obligations
under this warranty.

The foregoing warranties are exclusive and are given and accepted in lieu of all
other warranties of quality written or oral,  express or implied,  and all other
warranties are hereby disclaimed.


15. Logging of Operations

The Buyer shall keep a logbook of operation  for the  Supplies.  In this logbook
shall be  documented  all  sessions of  operation of the Supplies as well as any
problems  encountered  during  operation of the Supplies.  If the Buyer requests
assistance  from the Seller in  resolving a problem  with the  Supplies  and the
information in the log is relevant to this resolution, the Buyer may at its sole
discretion  make the log available to the Seller . If the Buyer presents a claim
against the  warranty  provided  by the  Seller,  a copy of the log must be made
available to the Seller.  It is  understood  by the Seller that the  information
contained in the Log may be of a proprietary  nature and is therefore covered by
the confidentiality agreement between the parties.


16. Training

The Seller agrees to provide up to two days of training in _________  operation,
preventative  maintenance and repair to the Buyers' personnel at the Site during
or immediately after the installation  period, with the exact dates and times to
be mutually  agreed by the Buyer and Seller.  The cost of such training shall be
the responsibility of the Seller.


17. Disclaimer of Liability for Personal Injury

The Seller and the Buyer hereby acknowledge that the products,  as offered,  are
highly sophisticated devices which should be operated only by trained personnel;
that it is the Buyer's sole obligation to retain and train such personnel or

<PAGE>


have it trained,  possibly by the Seller;  that, where  necessary,  the Supplies
contain  interlocking  devices  designed to prevent their  operation in a manner
which  would  cause  injury  to such  personnel,  but as in the  case  with  all
equipment  utilizing  high  voltages,  such  personnel  should  assume  that the
interlocking  devices are  inoperative and should take  appropriate  measures to
ensure that the voltage  has been turned off prior to begin  working  where high
voltage is present during the start up and/or operation of the Supplies; that it
is inherent in the  operation of the  Supplies  that  portions  thereof may emit
dangerous  ionizing  radiation  and may become  activated  during  their  normal
operation;  that it is the Buyer's sole  obligation  to  determine  the level of
radioactivity,  to ensure that a system exists for determining and recording the
levels of  radioactivity  and to ensure that no personnel  or other  persons are
exposed to radiation in excess of that permitted by relevant law or regulations.

Based upon the  foregoing  acknowledgments,  it is,  therefore,  agreed that the
Seller shall not incur any  liability  for personal  injury to any party arising
out of the operations and  maintenance of the Supplies  unless such liability is
solely  caused by a gross  negligence  on the part of the Seller in the  design,
implementation  or  documentation  including but not limited to maintenance  and
operation manuals for the Supplies. In order to give effect to these limitations
of the Seller's liability, and as an express condition of sale, the Buyer hereby
agrees to indemnify and hold the Seller  harmless  from any and all claims,  but
limited by the  exclusion  of  negligent  acts or  omissions  as outlined in the
preceding sentence, damages and liability, including reasonable attorney's fees,
arising  out of a claim  against the Seller for  personal  injuries of any party
occasioned by the operation and/or maintenance of such Supplies.


18. Liability for Consequential Damages

The Seller's  liability to the Buyer for damages howsoever caused shall under no
circumstances  whatsoever  (including  the decision of an  arbitration  panel or
court of law)  exceed  the  payments  actually  received  by the  Seller for the
Supplies  and the Seller shall under no  circumstances  have any  liability  for
special,  incidental,  indirect  or  consequential  damages,  including  without
limitation liability for loss of use, loss of profits, damage or injury to other
property or persons.



<PAGE>



19.  Infringement of Proprietary Rights

a) The Seller shall  indemnify  and hold  harmless the Buyer against any and all
losses,  liabilities  and  expenses,  by reason of any third party claim,  suit,
action or proceeding for alleged  infringement  of any  copyright,  trademark or
patent  of the  Buyer's  Country  or  alleged  conversion  of any  trade  secret
resulting from or arising in connection with the manufacture,  installation, use
or sale of the Supplies or any part thereof  including  any and all judgments or
decrees which may be rendered against the Buyer (and reasonable  attorney's fees
if Seller  should  fail to defend as  provided  in  subsection  b)  hereof,  and
settlements  made  arising out of any such  claim,  suit,  action or  proceeding
provided,  however  that this  indemnity  shall not  extend to any  infringement
resulting  from a breach  by the  Buyer  of this  Agreement  or of the  Seller's
instructions for the operation of the Supplies.  The Seller shall however not be
liable for any  infringement  or claim based upon the use of the Supplies or any
portion of the  documentation  in combination with other equipment or technology
not supplied by the Seller or resulting from any modification made by the Buyer,
without approval or instruction by Seller.

b) The Seller shall defend at its own expense all suits,  actions or proceedings
brought  against the Buyer with respect to the matters  listed in  subsection a)
above. The Buyer shall have the right at its option and at its sole expense,  to
participate  in the  defense  of any such  claim,  suit,  action or  proceeding,
without  relieving  the  Seller of any  obligation  hereunder.  The Buyer  shall
promptly  notify the  Seller in writing  after any such claim is made or suit is
brought and shall  cooperate with Seller in the defense  thereof as requested by
the Seller,  and the Seller  agrees to  reimburse  the Buyer for its  reasonable
out-of-pocket  expenses incurred at Seller's specific request in connection with
such  cooperation.  The  Buyer  shall  immediately  notify  the  Seller  of  any
infringement  claim made or  threatened  and shall refrain from any admission of
liability,  and will not  negotiate  or enter into any  settlement  without  the
Seller's prior consent.

c) If,  however,  as a  consequence  of a final  determination  of any  suit for
infringement  or any court decision  involving any injunction  resulting from or
arising in connection  with the  manufacture or sale of the Supplies or any part
thereof furnished or employed by the Seller hereunder,  the Buyer is enjoined or
limited  in any  material  manner in the use of said  Supplies  or part,  Seller
shall,  at its option and at its own expense either i) procure for the Buyer the
right to continue use of said Supplies or part, ii) so modify the Supplies or

<PAGE>


part so as to render them  non-infringing  without any significant effect to use
thereof, or iii) replace the Supplies or part with an equivalent  non-infringing
product.


20. Seller's and Buyer's Proprietary Information

Upon completion of the Acceptance  Tests,  the Seller shall furnish to the Buyer
free of charge  information,  manuals  and  drawings  in English and with metric
units of measure  relating  to the  Supplies  and  instructions  to the Buyer in
sufficient  detail to enable the Buyer and its employees to operate,  calibrate,
maintain and repair the Supplies and all parts thereof.  A definitive version of
the documentation,  including the modifications that are specific to the Buyer's
configuration and that are made during the final stages of installation, will be
provided six (6) months after the  completion  of the  Acceptances  Tests.  Such
information,  manuals,  drawings  and  instructions  and the  written  materials
furnished  by the Seller to the Buyer  under the Section  entitled  "Preparatory
Work"  hereof shall remain the property of the Seller and the Buyer shall have a
royalty-free  license  to  use  the  same  in  connection  with  the  operation,
calibration, maintenance and repair of the Supplies. The Buyer shall not use any
of the proprietary information supplied by the Seller for any other purpose than
the operation, calibration, maintenance and repair of the Supplies and the Buyer
shall not register, apply for registration or attempt to acquire any other legal
protection  for the said  proprietary  information in its own name, or any other
name,  or take any  action  which may  affect  the  Seller's  rights,  title and
interest in and to the  technology in any country,  without  obtaining the prior
consent of the Seller.  The Buyer shall treat such  information and materials in
the same  manner  as it  treats  its own  proprietary  information  and will use
similar  means to  protect  it from  unauthorized  disclosure.  The  same  Buyer
covenants and agrees that the contents of such written  information or materials
shall  not be  divulged  to any other  person,  firm or  corporation,  except as
allowed above.

The Seller agrees that all  information  transmitted  from Buyer to Seller under
this contract  including but not limited to,  information  relating to research,
development, manufacturing, testing, accounting and marketing will be considered
confidential  information.   This  confidential  information  will  be  held  in
confidence and not disclosed to third parties by the Seller.  This  confidential
information  shall be held in  confidence by the Seller using the same degree of
care as the Seller uses in  protecting  its own  confidential  information.  The
Seller shall only use such  confidential  information for the purpose of meeting
its obligations under this Agreement.



<PAGE>



21. Destruction of Supplies

In the event that prior to the delivery of the Supplies,  the Supplies are lost,
destroyed  or  damaged  to such an extent  that  they  cannot  be  repaired  and
delivered  in  accordance  with the  delivery  schedule set forth in the Section
entitled "Installation of Supplies",  provided the event is not a willful act of
the Seller, the time reasonably  required by the Seller to furnish a replacement
for the  Supplies or to  accomplish  such  repairs  shall be deemed an Excusable
Delay under the Section entitled  "Excusable  Delay" and the Seller shall not be
deemed to be in default or to have breached its duties hereunder.



22. Excusable Delay

Notwithstanding anything to the contrary herein contained, if the performance of
this  Agreement  by any  party  or the  obligation  of any  party  hereunder  is
prevented,  restricted  or  interfered  with by reason of : i) fire,  explosion,
strike,  lockout,  labor  dispute,  casualty  or  accident,  epidemic,  cyclone,
drought,  flood or ii) war,  revolution,  riot, civil commotion,  acts of public
enemies,  blockage  or  embargo,  or iii) any law or  proclamation,  regulation,
ordinance, demand or requirement of any applicable government or any subdivision
thereof  or  representative  of any  such  government,  or iv)  any  other  acts
whatsoever,  whether  similar  or  dissimilar  to those  enumerated,  beyond the
reasonable  control of a party  hereto,  then,  and in that event,  the party so
affected  shall  promptly  notify the other  party of all  reasonable  resulting
difficulties.  Upon such notice,  the disabled party shall,  for the duration of
its disability (referred to as "Excusable Delay" in this Agreement),  be excused
from the performance of such of its obligations as are prevented, restricted, or
interfered  with  by  reason  of the  occurrence  of any  of  the  events  above
enumerated  and such  party  shall  not be deemed to be in  default  under  this
Agreement  nor be subject to any  liability  or damage.  The time period  during
which any party is to perform  under this  Agreement  shall be  extended  by the
period of any Excusable Delay. Excusable Delay under the same terms occurring in
respect to the Seller's  sub-contractors  shall be deemed to be Excusable  Delay
occurring to the Seller.

If the Seller is prevented from proceeding according to any of the schedules set
out in this Agreement by the Buyer's fault, by a delay on the part of the Buyer,

<PAGE>


or by a regulatory body with jurisdiction over the Buyer's site, or if the Buyer
delays a payment or the issuance of a Letter of Credit  pursuant to Section 3 by
more than fifteen (15) days past the due date,  then all the dates  contained in
this  Agreement  for  completion  by the Seller of its  obligations  and rights,
including but not limited to the right to exercise the accelerated  delivery and
acceptance  option,  shall be  postponed  by an  additional  period equal to the
delay.


23. Termination for Insolvency

In the event that either the Buyer or the Seller :

a) makes a general assignment for the benefit of creditors or becomes insolvent;

b) files an insolvency petition in bankruptcy ;

c) petitions for or acquiesces in the  appointment  of any receiver,  trustee or
similar officer to liquidate or conserve its business or any substantial part of
its assets ;

d) commences,  under the laws of any jurisdiction,  any proceeding involving its
insolvency,  bankruptcy,   reorganization,   adjustment  of  debt,  dissolution,
liquidation  or any other  similar  proceeding  for the  release of  financially
distressed debtors ; or

e) becomes a party to any proceeding or action of the type described above in c)
or d) and such proceeding or action remains undismissed or unstayed for a period
of more than sixty (60) days,


then the other party may, by written notice, terminate this Agreement.


24. Spare Parts

The Seller agrees to make available to the Buyer,  as the Buyer may from time to
time require, _____________, spare parts and components to the Supplies, and the
Seller  agrees  to  exert  reasonable  efforts  to  meet  the  Buyer's  delivery
requirements  for said parts and  components  or acceptable  substitutes.  It is
understood  that the  parties  shall  negotiate  in good  faith  reasonable  and
mutually agreeable prices for said spare parts and components.



<PAGE>



25. Technical Assistance by the Seller

Immediately  following the  successful  completion of the  Acceptance  Tests the
Seller  shall send one of its  specialists  to assist the Buyer in bringing  the
cyclotron to full  operational  capacity.  The  specialist  shall be the project
coordinator  or, if he is not  available,  someone of equal or better  technical
expertise,  this other person to be approved by the Buyer,  such approval not to
be unreasonably  withheld. The Seller's specialist will remain at the site for a
period of 28 days unless the Buyer  agrees that the  services of the  specialist
are no longer required.  During this period,  the Buyer's specialist will define
the tasks to be  performed  by the  Seller's  specialist  with the  objective of
verifying  the  cyclotron  1) is fully  operational,  2) performs  according  to
specifications  within the production  environment and 3) its automated  control
system performs according to specifications. This period of technical assistance
does not relieve the Seller of any of its warranty  obligations,  including  the
requirement  that the Seller  send any  personnel  required  to the Site to make
repairs  should the  Supplies  be found to not meet  specifications  during this
period.


26. Entire Agreement

This Agreement,  made in two originals,  one for each party, contains the entire
agreement  between the parties and shall  supersede all previous  communications
and  agreements,  whether oral or written,  with  respect to the subject  matter
hereof and the provisions  hereof may not be modified or superseded except by an
instrument in writing signed by a duly authorized  officer or  representative of
each of the parties hereto.


27. Authorization

By virtue of having  affixed  their  respective  signatures  below,  each of the
parties  hereto  warrants  that it has obtained all  authorization  necessary to
enter into and perform its obligations under this Agreement.


28. Effective Date

This Agreement  shall become  effective as of the date upon which payment i), as
set forth in Section entitled  "Purchase Price of the Supplies",  is received by
the Seller.



<PAGE>



29. Disputes

With respect to any  controversy  arising out of or relating to this  Agreement,
such controversy shall be settled by final and binding  arbitration in New York,
NY,  USA,  in  accordance  with the  then-existing  rules (the  "Rules")  of the
American Arbitration Association ("AAA") and judgment upon the award rendered by
the  arbitrators  may be  entered  in any  court  having  jurisdiction  thereof;
provided,  however,  that the law applicable to any  controversy  and the law by
which this  Agreement  shall be construed  and governed  shall be the law of the
State  of New  York,  regardless  of its or  any  jurisdiction's  choice  of law
principles.  In any  arbitration,  pursuant  to this  Agreement,  the  award  or
decision  shall  be  rendered  by a  majority  of  the  members  of a  Board  of
Arbitration  consisting of three (3) members,  one of whom shall be appointed by
each  party  and the  third of whom  shall be the  Chairman  of the panel and be
appointed by mutual agreement of said two  party-appointed  arbitrators.  In the
event of failure of said two  arbitrators  to agree upon the  appointment of the
third  arbitrator   within  sixty  (60)  days  after  the  commencement  of  the
arbitration  proceeding,  the third  arbitrator shall be appointed by the AAA in
accordance  with the Rules. In the event that either party shall fail to appoint
an arbitrator  within thirty (30) days after the commencement of the arbitration
proceeding,  such arbitrator and the third  arbitrator shall be appointed by the
AAA in  accordance  with the  Rules.  The  Rules of  Evidence  and the  Right to
Discovery shall be applicable to both parties.

Work under this Agreement shall continue during the arbitration  proceedings and
payments due to the Seller shall not be withheld on account of such  proceedings
unless such  particular work or payment is the subject matter of the arbitration
in which case this provision shall not apply to such particular work or payment.

The parties agree to equally share the expenses associated with this arbitration
procedure.


30. Governing Laws

This Agreement  shall be governed by and construed in all respects in accordance
with the laws of the State of New York, USA.



<PAGE>



31. Notices

a) Any notice  given under this  Agreement  shall be made in  writing,  shall be
given by first class air mail,  telex,  telecopier or commercial cable and shall
be addressed to :

In the case of the Seller:
      Ion Beam Applications
      Chemin du Cyclotron, 3
      1348 Louvain-la-Neuve
      Belgium
      Attn : Mr. Yves Jongen
      Fax Number : 32-10-47.58.10

In the case of the Buyer :
      Theragenics Corporation
      5325, Oakbrook Parkway
      Norcross, GA 30093
      USA
      Attn : Mr. Glenn Dill
      Fax Number : 1 (404) 381 84 47

Either party,  by written  notice to the other,  may change the address to which
notices will be directed.

b) Any notice shall be deemed given on the date personally  delivered or sent by
telex,  telecopier or cable and fifteen (15) days after the date of mailing,  if
mailed.


32. Project Coordinator

Upon signing this Agreement,  both parties shall designate a representative  who
will act as Project  Coordinator  and official  addressee for all  communication
resulting from this  Agreement,  other than any official  notice given under the
Section  entitled   "Notices".   All  requests  for  service,   transmittals  of
information,  reports on training  activity,  and other  communication  required
under this  agreement  shall be sent by and directed to the  respective  Project
Coordinators. Informal conversations occurring person-to-person or by phone,

<PAGE>


requests and  information  shall be validated by an appropriate  written form as
confirmation.  Any communication sent to others than those designated as Project
Coordinators,  or in a  manner  not in  accordance  with the  Notices  procedure
specified in this Agreement will be considered as informal and non-existent.


33. Assignment

This  Agreement  shall inure to the  benefit of and be binding  upon each of the
parties hereto and their  respective  successors and assignees,  but neither the
rights nor the duties of either party hereunder may be assigned,  in whole or in
part by either party, without the prior written consent of the other party. Such
consent shall not be unreasonably withheld by either party. Any assignment shall
not relieve the assignee of any of the Agreement obligations of the assignor.


34. Headings

The headings  contained  within this  Agreement are  established  solely for the
convenience  of the  two  parties  and  are not  intended  to and do not  limit,
construe or modify any of the terms and conditions included hereof.


35. Severability

If  any  term  or  provision  of  this  Agreement  is  held  to  be  illegal  or
unenforceable, then this Agreement, except for such part or parts thereof, shall
continue to be in full force and effect.

In the event of any  inconsistency  between a provision of the conditions of the
Agreement and the content of an Appendix to this  Agreement,  and if the parties
cannot  agree on the  clause to take  precedence,  the AAA of Section 29 will be
asked to  mediate/arbitrate  the dispute  and the parties  agree to abide by the
finding of said association.



36.  Non-Waiver

The failure by either party to enforce at any time or for any period of time any
of the  provisions  hereof shall not be a waiver of such  provisions  nor of the
right of such party thereafter to enforce each and every such provision.


<PAGE>


IN WITNESS  WHEREOF,  the parties  have caused this  Agreement to be executed in
duplicate by their duly qualified officers or representatives.

THERAGENICS CORPORATION Inc.

Not Required
Christine Jacobs
President

/s/ Bruce Smith                                      /s/ Glenn Dill
Bruce Smith                                          Glenn Dill
Chief Financial Officer                              Director of Operations

ION BEAM APPLICATIONS, S.A.

 /s/ Yves Jongen                                     /s/ Sabine de Voghel
Yves Jongen                                          Sabine de Voghel
President                                            Area Sales Manager




<PAGE>


                                    APPENDIX

                              CYCLOTRON PARAMETERS

<PAGE>






                                    APPENDIX

<PAGE>


                                    APPENDIX

                              BUILDING REQUIREMENTS


<PAGE>






                                    APPENDIX

                       BUILDING COMPLETION SPECIFICATIONS

<PAGE>








                                    APPENDIX

                              INCLUDED SPARE PARTS


<PAGE>


                                    APPENDIX

                               ACCEPTANCE CRITERIA


<PAGE>


                                    APPENDIX

                                ACCEPTANCE TESTS


<PAGE>


                                    APPENDIX

                   ACCELERATED DELIVERY AND ACCEPTANCE OPTION




The  buyer  has the  option to  request  the  Seller,  at any time  during  this
Agreement to work on an accelerated schedule basis in order to have the Supplies
accepted   at  an  earlier   date  than  the   scheduled   acceptance   date  of
___________________  Official  requests must be made in writing and addressed to
Yves Jongen, President of IBA.

In the case the Buyer  exercises this option,  the Buyer will pay the seller and
additional  sum of  _________________  for each  complete day between the actual
date of early acceptance and __________________, including the day of __________
________________.



                                EXHIBIT 10.23(d)

                               Purchase Agreement
                                     between
                             Theragenics Corporation
                                       and
                           Ion Beam Applications s.a.
                                      dated
                                December 27, 1996


Confidentialportions of this  document have been blanked out and have been filed
            separately with the Securities and Exchange Commission.

<PAGE>










                               Purchase Agreement

                                     between

                          Theragenics Corporation Inc.

                                       and

                           Ion Beam Applications S.A.

                                       for

                       _______________ Cyclotron Number 8

                                       and

                            Related Target Equipment








<PAGE>


                                Table of Contents

Purchase Agreement

1.  Interpretation............................................................3
2.  Subject Matter of Sale....................................................4
3.  Purchase Price of the Supplies............................................5
4.  Title and Risk of Loss....................................................7
5.  Delivery..................................................................7
6.  Installation of Supplies..................................................7
7.  Preparatory Work..........................................................9
8.  Acceptance...............................................................11
9.  Transportation and Insurance.............................................13
10. Export Documents, Duties and Foreign Taxes...............................14
11. Customs Duties, Buyer's Country Taxes and Import Permits.................14
12. Warranty As To Title.....................................................14
13. Design and Performance Warranty..........................................15
14. Material and Workmanship Warranty........................................15
15. Logging of Operations....................................................16
16. Training.................................................................16
17. Disclaimer of Liability for Personal Injury..............................16
18. Liability for Consequential Damages......................................17
19. Infringement of Proprietary Rights.......................................17
20. Seller's and Buyer's Proprietary Information.............................19
21. Destruction of Supplies..................................................19
22. Excusable Delay..........................................................20
23. Termination for Insolvency...............................................21
24. Spare Parts..............................................................21
25. Technical Assistance by the Seller.......................................21
26. Entire Agreement.........................................................22
27. Authorization............................................................22
28. Effective Date...........................................................22
29. Disputes.................................................................22
30. Governing Laws...........................................................23
31. Notices..................................................................23
32. Project Coordinator......................................................24
33. Assignment...............................................................25
34. Headings.................................................................25
35. Severability.............................................................25
36. Non-Waiver...............................................................25

Appendices

Cyclotron Parameters
- ------------------------
Building Requirements
Building Completion Specifications
Included Spare Parts
Acceptance Criteria
Acceptance Tests
Accelerated Delivery and Acceptance Option




<PAGE>


                               Purchase Agreement


AGREEMENT  made as of this 27th day of  December  1996 by and  between  ION BEAM
APPLICATIONS,  S.A., a corporation  organized under the laws of Belgium,  having
its principal  office at Chemin du Cyclotron 3, 1348  Louvain-la-Neuve,  Belgium
(hereinafter  called the "Seller",  which expression includes its successors and
permitted assignees) and THERAGENICS CORPORATION, having its principal office at
5325 Oakbrook  Parkway,  Norcross,  Georgia 30093, USA  (hereinafter  called the
"Buyer", which expression includes its successors and permitted assignees).

WITNESSETH :

WHEREAS, the Seller wishes to sell to the Buyer and the Buyer wishes to buy from
the  Seller,  the  Seller's  model  _____________  cyclotron,   related  _______
equipment and spare parts therefore, all as more particularly described herein :
and

WHEREAS,  the Buyer wishes the Seller to assemble,  install,  start up, test and
make operational the _______________ cyclotron to be purchased including related
equipment and the Seller is willing to undertake this task : and

NOW, THEREFORE,  in consideration of the mutual covenants herein contained,  the
parties hereto agree as follows :


1. Interpretation

In this Agreement, unless the contrary intention appears :

"Acceptance" means the process whereby the Seller demonstrates to the Buyer that
the Supplies provided meet the requirements of the Agreement. This process shall
consist of a series of tests,  the  "Acceptance  Tests" as  defined in  Appendix
"Acceptance   Tests",   which  demonstrate  the  Supplies  meet  the  guaranteed
specifications, the Acceptance Criteria.


<PAGE>


"Acceptance  Criteria"  mean the  guaranteed  specifications  of the Supplies as
defined in Appendix "Acceptance Criteria".

"Acceptance  Date"  means the date on which the Buyer  agrees  that based on the
Acceptance  Tests, the Supplies have met the Acceptance  Criteria . The Supplies
shall be deemed  accepted  when the Buyer and Seller  agree in writing  that the
Acceptance Tests have been successfully completed.

"Acceptance Tests" are the tests listed in Appendix "Acceptance Tests".

"Agreement" means this document and includes its Appendices.

"Buyer's Country" means the country where the Site is located.

"Day" means calendar day;  "Week" means  calendar  week;  "Month" means calendar
month.

When the last day of any period  prescribed  for the execution of any assignment
falls on a day which is not a working day in Belgium or in the Buyer's  Country,
the  assignment  may be  performed  on  the  first  working  day  following  the
aforementioned day.

"Effective Date" has the meaning set forth in Section entitled "Effective Date".

"Excusable  Delay"  has the  meaning  set forth in Section  entitled  "Excusable
Delay".

"Site" means the Buyer's facility in Buford, Georgia, USA.

"Supplies" means all equipment,  hardware, software (including installation) and
the  associated  documentation,  support  equipment  and services to be provided
under the Agreement, as detailed in Appendix "Cyclotron Parameters" and Appendix
"________________________."



<PAGE>



2. Subject Matter of Sale

Subject to the terms and conditions of this Agreement :

a) The Seller  shall sell and deliver to the Buyer and the Buyer shall  purchase
from  the  Seller  (i)  a  ________________   model  cyclotron,   the  technical
specifications  of which are more fully  described  in the  Appendix  "Cyclotron
Parameters"  Appendix  hereto;  (ii)__________________________,   the  technical
specifications   of   which   are  more   fully   described   in  the   Appendix
"__________________________"  hereto;  and (iii) a set of spare parts  listed in
the Appendix "Included Spare Parts" hereto;

b) The Seller shall also assemble, install, start up, test, make operational and
perform the Acceptance Tests on the Supplies.

c) The  Seller  shall  send one of his  specialists  to assist in  bringing  the
cyclotron to full  operational  capacity after Acceptance of the Supplies by the
Buyer, as described in Section 25.

d) The Buyer and  Seller  agree  that an option  for  accelerated  delivery  and
acceptance as described in Appendix "Accelerated Delivery and Acceptance Option"
may be  exercised  by the Buyer.  In case that option is exercised by the Buyer,
the covenants of the "Accelerated Delivery and Acceptance Option" Appendix shall
be applicable to both parties.


3. Purchase Price of the Supplies

a) The  aggregate  purchase  price  (hereinafter  the "Price") of the  Supplies,
including  packaging,  insurance and transportation of the Supplies to the Site,
the  assembly,  testing and start up of the  Supplies  described  in the Section
entitled  "Subject  Matter  of  Sale"  above,  shall  be  ______________________
________________________. This price shall also include the technical assistance
by the Seller as  described in Section 25, the Spare Parts as listed in Appendix
"Included  Spare  Parts" and the Seller's  contribution  to the  applicable  USA
customs duty as stated in Section 11 of this Agreement.

b) As a down payment  equivalent to  ____________  has been made by the Buyer to
the Seller on November 6, 1996, the balance of the Price set forth in subsection
a) shall be payable as follows:


<PAGE>


     i) _____________________________________________________________________ to
be paid to the Seller upon execution of this Agreement;

     ii) ____________________________________________________________ to be paid
to the  Seller  on  March 1,  1997.  This  payment  shall  be  guaranteed  by an
irrevocable  standby  letter of credit to be issued in favor of and  approved by
the Seller within one month from the Effective Date.

     iii)   _____________________________________________________________ to  be
paid to the Seller on April 1, 1998.  This  payment  shall be  guaranteed  by an
irrevocable  standby  letter of credit to be issued in favor of and  approved by
the Seller by March 1, 1997.

     iv)  ___________________________________________________________ to be paid
to the Seller  within 15 days from  shipment  of the  Supplies as  evidenced  by
receipt of the  shipping  documents  and no later than  September 1, 1998 if the
shipment is delayed by Buyer's  fault.  This payment  shall be  guaranteed by an
irrevocable  standby  Letter of Credit to be issued in favor of and  approved by
the Seller by the date of shipping of the Supplies,  to be notified by Seller to
the Buyer at least 30 days in advance.

     v)  _________________________________________________________ to be paid to
the Seller within 15 days of the Acceptance of the Supplies.  This payment shall
be guaranteed by an  irrevocable  stand-by  Letter of Credit,  which can only be
exercised  during  the  year  following  the  delivery  of  the  Supplies,   and
conditioned  only  upon  successful  completion  of  the  Acceptance  Tests  and
providing  further  that,  in the event the Seller is  prevented  by the Buyer's
fault,  by a delay  on the  part of the  Buyer,  or by a  regulatory  body  with
jurisdiction over the Buyer from completing the Acceptance Tests for a period of
sixty (60) days or more,  payment  thereunder  to the Seller  shall be made upon
demand of the  Seller.  This  Letter  of Credit  shall be issued in favor of and
approved by the Seller,  such approval not to be unreasonably  withheld,  by the
date of  shipping  of the  Supplies,  to be notified by Seller to Buyer at least
thirty days in advance.

c) All  payments  by the Buyer to the Seller  under this  Agreement  shall be in
Belgian Francs and,  except those  specified in paragraph 3. b) above,  shall be
made by wire transfer within thirty (30) days from the date of invoice.


<PAGE>


d) All  payments  by the Buyer to the Seller will be deemed to have been made by
the Buyer on the date on which  the  Seller  has been  credited  for the  proper
amounts.  Any payment due to the Seller  which is not paid on the due date shall
accrue  interest for each started  month of delay at an annual rate of one point
above  the rate of the  "Avance  en Compte  Courant  Hors  Plafond  de la Banque
Nationale de Belgique" as published in "l'Echo" on the first day of such month.


4. Title and Risk of Loss

Except as indicated  below in this  paragraph,  title to the  Supplies  shall be
transferred  from the Seller to the Buyer when and to the  extent  payments  are
received by the Seller.  The Buyer  represents  and  warrants  that it shall not
cause or permit to be caused  any lien or  encumbrance  of any kind to be placed
upon the  Supplies  to an  extent  greater  than its share of  ownership  in the
Supplies.  It is  understood  that if the  Seller is unable to  demonstrate  the
Supplies  meet  the  Acceptance  Criteria  within  one year of  delivery  of the
Supplies to the Buyer's Site, clear title to the Supplies transfers to the Buyer
without  obligation to pay to the Seller the final payment  specified in Section
3.b.v unless the Seller has been prevented from conducting the Acceptance  Tests
as described in Section 8, last paragraph.

Risk of loss of any part of the Supplies shall pass from the Seller to the Buyer
upon delivery of such parts to the Site.


5. Delivery

The  Seller  shall  deliver  the  Supplies  to the Buyer at the Site and set the
Supplies in their final location.


6. Installation of Supplies

a) The assembly and  installation of the Supplies at the Site and the Acceptance
Tests are planned to be completed by _____________________________________ after
completion  of  Site  preparation  by  the  Buyer  at  the  Seller's  reasonable
satisfaction  as  evidenced  by  an  acceptance  document  of  the  Site  ("Site
Acceptance  Document")  signed by the  Seller,  whichever  is later.  The Seller
undertakes to make its best efforts to complete the installation and testing

<PAGE>


within this period.  During the  installation  period the Buyer shall permit the
Seller's  employees,  subcontractors  or  agents  unlimited  access  to the Site
provided said  individuals  comply with policies and procedures  established for
the Buyer's employees regarding such matters as health and safety issues.

b)  With  reasonable  notice  to  the  Seller,  the  Buyer  and  its  authorized
representatives  shall,  during reasonable working hours, be free to inspect the
quality and  conditions of the Supplies at the Seller's site during  fabrication
and at any time upon arrival of the same at the Site and during the installation
period.  The Seller will notify in writing to the Buyer when the major materials
are available for construction of the cyclotron.

c) The Buyer at its sole expense shall  provide the Seller with closed  premises
on or reasonably  near the Site in which the Seller may store employee  clothing
and tools and equipment required for the installation.  However,  the Buyer does
not assume any risk with respect to the loss or theft of any such items while on
the Buyer's premises.

d) The Buyer shall,  at its sole expense,  provide the Seller with the following
utilities  required for installation of the Supplies and Acceptance Tests on the
Supplies:  electricity,  water,  compressed  air,  dry  nitrogen for venting the
vacuum  chamber,  hydrogen  gas for the ion  source,  as  described  in Appendix
"Building Requirements".  Access to telephone and fax equipment connected to the
international network is required and the Seller will pay the charges associated
with the use of this line.  The Buyer shall provide all the necessary  radiation
measuring  equipment  required for the operation and the Acceptance Tests on the
Supplies.

e) Within  fifteen  (15) days from the date of delivery of the  cyclotron at the
Site, the Buyer shall permit the Seller to produce beams at full energy and full
intensity in the cyclotron vault.

f) The Price  reflects labor  provided by the Seller.  Any  additional  labor or
costs  required by local labor codes,  etc.  will be the  responsibility  of the
Buyer.

g) The Supplies are manufactured  according to Belgian technical  standards.  If
the Buyer requires compliance of the Supplies with specific technical standards,
these  technical  standards  must be notified by the Buyer to the Seller  within

<PAGE>


seven weeks of the Effective  Date. All  additional  costs related to making the
Supplies  conform to those norms or specific  standards  shall be charged to the
Buyer.


7. Preparatory Work

a) The Buyer shall have the sole  responsibility,  at its sole expense,  for the
work required to prepare the Site for installation of the Supplies. The building
to house the Supplies and the systems  contained  therein  shall comply with the
specifications   detailed  in  Appendix  "Building  Requirements"  and  Appendix
"Building Completion Specifications". As soon as possible after completion, and,
at the latest,  on  _________________,  the Seller shall prepare for the Buyer a
proposed  layout and prepare such other plans and  memoranda as are necessary to
transmit data to the Buyer's architects and engineers.  By _______________,  the
Buyer shall furnish to the Seller  drawings and plans for the Site including the
building and systems detailed in Appendix  "Building  Requirements" and Appendix
"Building  Completion  Specifications" in sufficient detail to enable the Seller
to judge  whether the Site will be  satisfactory  for the Supplies and will meet
the  specifications  detailed in Appendix  "Building  Requirements" and Appendix
"Building  Completion  Specifications".  Within four (4) weeks of the receipt of
this initial set of architectural and engineering drawings and plans, the Seller
shall provide the Buyer with  comments  thereon and detailed  information  as to
such modifications therein as the Seller deems necessary including such drawings
and  technical  documents  as may be  required  by the  Buyer  to  complete  the
installation of the cables,  cooling water and compressed air systems.  However,
the time devoted to preparation by personnel of Seller of additional  layouts or
drawings  and/or  reviews  of  revised  sets of  architectural  and  engineering
drawings will be invoiced at Seller's  regular rates. No additional  charge will
be made for telephone  consultations.  Travel and related expenses incurred as a
result of attendance by personnel of the Seller  required at meeting  outside of
Belgium   with   the   Buyer's   architects,   engineers,   consultants   and/or
representatives  will be reimbursed by the Buyer. With respect to the foregoing,
the  responsibility  for  determining  whether  conflict  exists  between  local
building  codes and/or other laws or government  regulations  and the content of
drawings,  data sheets,  memoranda or other forms of communication  submitted by
the Seller is solely the responsibility of the Buyer, his architects,  engineers
and/or  consultants.  The  definitive  drawings and plans for the Site,  made in
accordance  with  the  Seller's  comments  and  recommendations,  will  then  be
furnished by the Buyer to the Seller by  ________________.  In addition,  unless
otherwise specified, the Buyer shall have the sole responsibility for the design
and construction of the radiation monitoring systems, of the shielding required

<PAGE>


to prevent  radiation leakage and of the systems required to handle the disposal
of radioactive waste.

Any delay on the part of the Seller in meeting its  obligations  related to this
Section  by more  than ten (10)  days  will add a number  of days to the  period
provided for the  performance  by the Buyer equal to the number of days of delay
by the Seller.

b) Before  commencing  installation,  the Seller shall  inspect the Site and the
Buyer shall  submit to the Seller the Site  Acceptance  Document to be signed by
the Seller confirming that the preparatory work meets all the criteria set forth
in the Section entitled  "Installation of Supplies",  paragraph c) and d) and in
Appendix   "Building    Requirements"   and   Appendix   "Building    Completion
Specifications".   This   acceptance   document  only   indicates  the  Seller's
willingness to begin the  installation of the Supplies in the Buyer's  building.
It  does  not  discharge  the  Buyer  and  his  subcontractors  of any of  their
responsibilities   regarding  the  building.   The  Buyer  shall   complete  the
preparatory  work at the Site by  _______________.  If the  preparatory  work as
regards the cyclotron  vault is  substantially  completed  before that date, the
Buyer shall  accept  delivery  and/or  installation  of the  Supplies as soon as
possible under the applicable laws and regulations.  In the event that such work
has not been completed before that date, or if for any other reason the Buyer is
unable to accept delivery of the Supplies or  commencement  of the  installation
thereof by that date, the Buyer shall immediately give the Seller written notice
of this fact and the  anticipated  new date for  completion  of the  preparatory
work. In any case, the Seller may ship the Supplies to the Buyer at any time and
the  Buyer  shall  store  them  in one of its  warehouses  until  the  date  the
preparatory work is completed.

c) One week before  commencing  installation and setting of the cyclotron in its
vault,  the Buyer shall allow the Seller  full  access to the  cyclotron  vault,
power supplies and control room and all other rooms related to the  installation
of the Supplies to allow for the measurement of line-up marks to be performed.

d) The Buyer's completion,  to the reasonable satisfaction of the Seller, of its
undertakings  in this  section  and  elsewhere  in this  Agreement  relating  to
preparation of the Site and the continuous  furnishing of necessary services and
permits set forth in the Section entitled "Installation of Supplies",  paragraph
c), d) and e) and in Section entitled "Custom Duties,  Buyer's Country Taxes and
Import   Permits"   and  the   requirements   detailed  in  Appendix   "Building

<PAGE>


Requirements"  and  Appendix  "Building  Completion  Specifications"  shall be a
condition precedent to the Seller's commitment to perform within the time period
specified under the Section entitled  "Installation of Supplies" hereof, and any
delay or  interruption  by the  Buyer in  meeting  its  obligations  under  this
Agreement in a timely  fashion  shall extend the Seller's  time to perform under
this  Agreement  including  but not  limited to Seller's  time to  exercise  and
perform under the option for  accelerated  delivery and  acceptance  outlined in
Appendix  "Accelerated Delivery and Acceptance Option", by a period equal to the
period of the Buyer's delay or interruption plus, if shipment and/or delivery is
delayed by Buyer's  fault or at Buyer's  request,  an  additional  period not to
exceed four weeks to reschedule  shipment and/or delivery of the Supplies and/or
personnel as may be required.

In the event of any such delay or  interruption,  the Buyer will  reimburse  the
Seller for any  reasonable  costs  incurred as a direct  result of such delay or
interruption.  Additionally,  if such  postponement or  interruption  delays the
Buyer's  obligation  to make any of the payments  set forth in Section  entitled
"Purchase Price of the Supplies", paragraph b) hereof, interest will be computed
for each  started  month of delay at an annual  rate one point above the rate of
the "Avance en Compte  Courant Hors Plafond de la Banque  Nationale de Belgique"
as published in "l'Echo" on the first day of such month.

If all the  conditions  necessary  for the  Seller  to sign the Site  Acceptance
Document  referred  to in the  above  Section  have  not been met at the time of
delivery of the Supplies,  the Seller will  nonetheless make its best efforts to
start the  installation  of the Supplies as soon as reasonably  possible and the
Buyer will give the Seller any reasonable  support to allow the Seller to do so.
However,  beginning of installation of the Supplies in the building,  under such
conditions,  will under no circumstances be considered as implicit acceptance of
the Site by the Seller.


8. Acceptance

On the date set by the Seller for the conduct of the  Acceptance  Tests,  and in
the presence of the Buyer's  representatives,  the Seller shall begin to conduct
the agreed-upon Acceptance Tests.

Not more than twenty four (24) hours following the completion of such tests, the
Buyer shall either accept the Supplies as conforming to the requirements of the

<PAGE>


Agreement  by  issuing  an  acceptance  certificate   "Acceptance   Certificate"
acknowledging  that  decision,  or advise the Seller in writing of the extent to
which the Supplies do not meet the requirements of the Agreement.

The Buyer shall not withhold the issue of the Acceptance  Certificate on account
of minor omissions or defects in the Supplies which do not substantially  affect
their use but may designate in the Acceptance  Certificate such minors omissions
or defects. The Seller shall promptly make good these omissions or defects.

If the Buyer does not give notice within the period  stipulated above, or begins
using the  Supplies for its own use,  such tests shall be deemed  satisfactorily
completed,  the Acceptance  Certificate  shall be deemed issued on that date and
the related  acceptance  payment shall be paid to the Seller within 15 days from
that date.

If  the  Buyer   gives  the  Seller   notice  that  such  tests  have  not  been
satisfactorily  completed,  the  Seller  shall  make  such  adjustments  as  are
necessary  and  repeat  the   Acceptance   Tests  until  the  Buyer  deems  them
satisfactory pursuant to the terms set out above.

Until  _________________  the Seller shall have unimpeded access to the Supplies
to  complete  the  Acceptance  Tests.  If the  Seller is unable to  successfully
complete the Acceptance Tests by  __________________  the Buyer shall be free to
begin use of the Supplies forty five (45) days later. Should the Supplies be put
into use under this condition, it is understood the Buyer and Seller will make a
good faith effort to facilitate the completion of the Acceptance  Tests,  but it
is further  understood  that the Buyer's  production  of Pd-103 with the machine
takes  precedence.  The Buyer agrees to allow the Seller three (3)  prescheduled
days of unimpeded  access to the  Supplies  per month during the period  between
____________________ until the period for acceptance has expired as specified in
Section 4 "Title and Risk of Loss".

If a dispute  arises  between  the Buyer and the Seller  concerning  whether the
Acceptance Tests have been successfully  completed or concerning the issuance of
the  Acceptance  Certificate,  the Buyer and the Seller  will  jointly  agree to
obtain the services of the American Arbitration Association ("AAA") to arbitrate
the dispute,  as described in Section 29  hereafter.  Both parties will abide by
AAA's recommendations.


<PAGE>


If the Seller is prevented  either by the Buyer or by any  regulatory  body that
has juridiction over the Buyer from conducting the Acceptance Tests for a period
of sixty (60) days,  the Buyer  shall be deemed to have  accepted  the  Supplies
sixty  (60) days  after the  Seller  was first  prevented  from  conducting  the
Acceptance  Tests. If the Seller is prevented by force majeure or events similar
to  those  enumerated  under  Section  "Excusable  Delay"  from  conducting  the
Acceptance  Tests, the Buyer shall pay 50% of the Acceptance  payment as defined
in Section 3 b) v). In either  case the Seller  shall  complete  the  Acceptance
Tests within the period remaining at the time the impediment began.


9. Transportation and Insurance

Seller shall at its own expense :

i) Obtain appropriate  property and liability  insurance covering loss or damage
to the Supplies  and  injuries to  individuals  during the  construction  of the
Supplies and during the  transportation  of the Supplies from the Seller's plant
to the Site.

ii) Pay all freight and other transportation charges associated with delivery of
the Supplies to the Site, and have a representative  present during the transfer
of the Supplies from the port of entry to the Site.

iii) Maintain worker's compensation insurance during the assembly,  installation
and testing of the  Supplies,  as  required  by  applicable  law,  covering  its
employees  and,  upon request  from Buyer,  provide a  certificate  of insurance
evidencing such coverage.

Buyer shall at its own expense:

i) Obtain appropriate  property and liability  insurance covering loss or damage
to the Supplies  between  delivery of the Supplies at the Site and the time when
the  Seller  has  been  paid in full  for the  amounts  under  Section  entitled
"Purchase Price of the Supplies". In such insurance policies, both the Buyer and
the Seller shall be named as insured parties.

ii) Arrange for the  destruction,  pick-up  and/or  clearing  away of all waste,
including the Supplies  packaging  except for the disposal of radioactive  waste
which is covered in section 12 of appendix "Building Completion Specifications".


<PAGE>


The Buyer and the Seller  shall each take out and  maintain at their own expense
during the period from receipt of the  Supplies at the Site through  Acceptance,
insurance to provide  coverage for both itself and the other party for an amount
of at least one million US dollars  (US$  1,000,000)  per  accident  against any
direct and indirect liability for bodily injury and death to individuals and all
direct or  indirect  costs,  losses  and  damages to the  property  of the other
arising  out of  each  other's  acts  or  omissions  in  unloading,  assembling,
installing and testing of the Supplies.


10. Export Documents, Duties and Foreign Taxes

The Seller will be  responsible  for obtaining all necessary  export  permits or
licences  relating  to the  Supplies  and the Buyer will  offer such  reasonable
assistance  in this regard as the Seller may  request.  The Seller shall pay any
and all export  duties and all other taxes  required  to be paid  outside of the
Buyer's Country in connection with the sale of the Supplies.


11. Customs Duties, Buyer's Country Taxes and Import Permits

The Buyer  shall pay all sales,  use,  gross  receipts,  excise and other  taxes
assessed  or levied by the  Buyer's  Country or any other  taxing  jurisdiction,
state or local,  within the Buyer's  Country,  against the Buyer  (including any
fines, penalties and interests thereof) as a result of or in connection with the
sale, use, delivery, storage or transfer of the Supplies.

The Seller agrees to equally share with the Buyer the cost of the import customs
duties levied by the customs authorities of the USA at the entry of the Supplies
into the USA, up to a maximum  cost for the Seller  equal to two percent (2%) of
the price of the Supplies.

The Buyer shall be responsible  for obtaining all necessary  permits or licences
with respect to the  importation of the Supplies in the Buyer's  Country and the
installation  and use of the Supplies at the Site, and the Seller will offer the
Buyer such reasonable assistance in this regard as the Buyer may request.


12.  Warranty As To Title

The Seller warrants good title to the Supplies.



<PAGE>



13. Design and Performance Warranty

The Seller hereby  warrants  that the Supplies  will perform in accordance  with
applicable  design  and  performance   specifications   set  forth  in  Appendix
"Cyclotron Parameters" and in Appendix  __________________________  for a period
of one (1) year after the  Acceptance  Date. The Seller shall resolve any design
flaws appearing during the first year following the Acceptance of the Supplies.


14. Material and Workmanship Warranty

The  Seller  hereby  warrants  that the  Supplies  will be free from  defects in
material  and  workmanship  for a  period  of one  (1)  year  from  the  date of
acceptance of the Supplies by the Buyer or fifteen (15) months from the date the
Supplies are put in their final  location in the Buyer's vault if the Acceptance
Date is delayed at the Buyer's  request or through the Buyer's fault,  whichever
period is shorter: provided,  however, that this warranty shall not apply to ion
source stamped cathodes and chimneys,  puller electrodes,  air filters, targets,
oil for the vacuum  pumps,  demineralizing  column,  gas bottles (H2 for the ion
source, N2 for  venting,...),  and other  consumables;  that the Seller makes no
warranty with respect to failures notified after the warranty period or failures
during operation without logging or failures due to alteration, misapplications,
abuse, abnormal conditions of temperature,  dirt, corrosive matter,  maintenance
not  carried  out  according  to the  Seller's  instructions,  lack  of  trained
personnel for maintenance,  operation above rated capacities either  intentional
or otherwise,  or in an otherwise  improper  manner or physical damage caused by
persons  other than  employees or agents of the Seller;  that the Seller's  sole
liability  under valid  warranty  regarding  claims for defects in material  and
workmanship is limited, at the option of the Seller, to repair or replacement of
the defective parts; that with respect to components purchased by the Seller for
incorporation into the Supplies  essentially  without  modification,  the Seller
makes no  warranties  of its own but  assigns  to the  Buyer  the full  warranty
extended to the Seller as part of the original purchase of the component.

If, due to a fault of the Seller,  the Supplies  have not passed the  Acceptance
Tests by  ______________,  the  Seller's  warranty  shall start and be in effect
until ________________.



<PAGE>


The Seller  shall  bear the cost and risk of loss  during  transport  of (i) any
defective  part or components  being  returned to the Seller's  factory with the
Seller's  agreement and (ii) any repaired or replacement  item being returned to
the Buyer.  Products or parts returned without the agreement of the Seller shall
be at the Buyer's  sole risk and expense.  The Seller  shall bear any  personnel
costs incurred in connection  with the  fulfillment of the Seller's  obligations
under this warranty.

The foregoing warranties are exclusive and are given and accepted in lieu of all
other warranties of quality written or oral,  express or implied,  and all other
warranties are hereby disclaimed.


15. Logging of Operations

The Buyer shall keep a logbook of operation  for the  Supplies.  In this logbook
shall be  documented  all  sessions of  operation of the Supplies as well as any
problems  encountered  during  operation of the Supplies.  If the Buyer requests
assistance  from the Seller in  resolving a problem  with the  Supplies  and the
information in the log is relevant to this resolution, the Buyer may at its sole
discretion  make the log available to the Seller . If the Buyer presents a claim
against the  warranty  provided  by the  Seller,  a copy of the log must be made
available to the Seller.  It is  understood  by the Seller that the  information
contained in the Log may be of a proprietary  nature and is therefore covered by
the confidentiality agreement between the parties.


16. Training

The Seller agrees to provide up to two days of training in __________ operation,
preventative  maintenance and repair to the Buyers' personnel at the Site during
or immediately after the installation  period, with the exact dates and times to
be mutually  agreed by the Buyer and Seller.  The cost of such training shall be
the responsibility of the Seller.


17. Disclaimer of Liability for Personal Injury

The Seller and the Buyer hereby acknowledge that the products,  as offered,  are
highly sophisticated devices which should be operated only by trained personnel;
that it is the Buyer's sole obligation to retain and train such personnel or

<PAGE>


have it trained,  possibly by the Seller;  that, where  necessary,  the Supplies
contain  interlocking  devices  designed to prevent their  operation in a manner
which  would  cause  injury  to such  personnel,  but as in the  case  with  all
equipment  utilizing  high  voltages,  such  personnel  should  assume  that the
interlocking  devices are  inoperative and should take  appropriate  measures to
ensure that the voltage  has been turned off prior to begin  working  where high
voltage is present during the start up and/or operation of the Supplies; that it
is inherent in the  operation of the  Supplies  that  portions  thereof may emit
dangerous  ionizing  radiation  and may become  activated  during  their  normal
operation;  that it is the Buyer's sole  obligation  to  determine  the level of
radioactivity,  to ensure that a system exists for determining and recording the
levels of  radioactivity  and to ensure that no personnel  or other  persons are
exposed to radiation in excess of that permitted by relevant law or regulations.

Based upon the  foregoing  acknowledgments,  it is,  therefore,  agreed that the
Seller shall not incur any  liability  for personal  injury to any party arising
out of the operations and  maintenance of the Supplies  unless such liability is
solely  caused by a gross  negligence  on the part of the Seller in the  design,
implementation  or  documentation  including but not limited to maintenance  and
operation manuals for the Supplies. In order to give effect to these limitations
of the Seller's liability, and as an express condition of sale, the Buyer hereby
agrees to indemnify and hold the Seller  harmless  from any and all claims,  but
limited by the  exclusion  of  negligent  acts or  omissions  as outlined in the
preceding sentence, damages and liability, including reasonable attorney's fees,
arising  out of a claim  against the Seller for  personal  injuries of any party
occasioned by the operation and/or maintenance of such Supplies.


18. Liability for Consequential Damages

The Seller's  liability to the Buyer for damages howsoever caused shall under no
circumstances  whatsoever  (including  the decision of an  arbitration  panel or
court of law)  exceed  the  payments  actually  received  by the  Seller for the
Supplies  and the Seller shall under no  circumstances  have any  liability  for
special,  incidental,  indirect  or  consequential  damages,  including  without
limitation liability for loss of use, loss of profits, damage or injury to other
property or persons.




<PAGE>



19.  Infringement of Proprietary Rights

a) The Seller shall  indemnify  and hold  harmless the Buyer against any and all
losses,  liabilities  and  expenses,  by reason of any third party claim,  suit,
action or proceeding for alleged  infringement  of any  copyright,  trademark or
patent  of the  Buyer's  Country  or  alleged  conversion  of any  trade  secret
resulting from or arising in connection with the manufacture,  installation, use
or sale of the Supplies or any part thereof  including  any and all judgments or
decrees which may be rendered against the Buyer (and reasonable  attorney's fees
if Seller  should  fail to defend as  provided  in  subsection  b)  hereof,  and
settlements  made  arising out of any such  claim,  suit,  action or  proceeding
provided,  however  that this  indemnity  shall not  extend to any  infringement
resulting  from a breach  by the  Buyer  of this  Agreement  or of the  Seller's
instructions for the operation of the Supplies.  The Seller shall however not be
liable for any  infringement  or claim based upon the use of the Supplies or any
portion of the  documentation  in combination with other equipment or technology
not supplied by the Seller or resulting from any modification made by the Buyer,
without approval or instruction by Seller.

b) The Seller shall defend at its own expense all suits,  actions or proceedings
brought  against the Buyer with respect to the matters  listed in  subsection a)
above. The Buyer shall have the right at its option and at its sole expense,  to
participate  in the  defense  of any such  claim,  suit,  action or  proceeding,
without  relieving  the  Seller of any  obligation  hereunder.  The Buyer  shall
promptly  notify the  Seller in writing  after any such claim is made or suit is
brought and shall  cooperate with Seller in the defense  thereof as requested by
the Seller,  and the Seller  agrees to  reimburse  the Buyer for its  reasonable
out-of-pocket  expenses incurred at Seller's specific request in connection with
such  cooperation.  The  Buyer  shall  immediately  notify  the  Seller  of  any
infringement  claim made or  threatened  and shall refrain from any admission of
liability,  and will not  negotiate  or enter into any  settlement  without  the
Seller's prior consent.

c) If,  however,  as a  consequence  of a final  determination  of any  suit for
infringement  or any court decision  involving any injunction  resulting from or
arising in connection  with the  manufacture or sale of the Supplies or any part
thereof furnished or employed by the Seller hereunder,  the Buyer is enjoined or
limited  in any  material  manner in the use of said  Supplies  or part,  Seller
shall,  at its option and at its own expense either i) procure for the Buyer the
right to continue use of said Supplies or part, ii) so modify the Supplies or

<PAGE>


part so as to render them  non-infringing  without any significant effect to use
thereof, or iii) replace the Supplies or part with an equivalent  non-infringing
product.


20. Seller's and Buyer's Proprietary Information

Upon completion of the Acceptance  Tests,  the Seller shall furnish to the Buyer
free of charge  information,  manuals  and  drawings  in English and with metric
units of measure  relating  to the  Supplies  and  instructions  to the Buyer in
sufficient  detail to enable the Buyer and its employees to operate,  calibrate,
maintain and repair the Supplies and all parts thereof.  A definitive version of
the documentation,  including the modifications that are specific to the Buyer's
configuration and that are made during the final stages of installation, will be
provided six (6) months after the  completion  of the  Acceptances  Tests.  Such
information,  manuals,  drawings  and  instructions  and the  written  materials
furnished  by the Seller to the Buyer  under the Section  entitled  "Preparatory
Work"  hereof shall remain the property of the Seller and the Buyer shall have a
royalty-free  license  to  use  the  same  in  connection  with  the  operation,
calibration, maintenance and repair of the Supplies. The Buyer shall not use any
of the proprietary information supplied by the Seller for any other purpose than
the operation, calibration, maintenance and repair of the Supplies and the Buyer
shall not register, apply for registration or attempt to acquire any other legal
protection  for the said  proprietary  information in its own name, or any other
name,  or take any  action  which may  affect  the  Seller's  rights,  title and
interest in and to the  technology in any country,  without  obtaining the prior
consent of the Seller.  The Buyer shall treat such  information and materials in
the same  manner  as it  treats  its own  proprietary  information  and will use
similar  means to  protect  it from  unauthorized  disclosure.  The  same  Buyer
covenants and agrees that the contents of such written  information or materials
shall  not be  divulged  to any other  person,  firm or  corporation,  except as
allowed above.

The Seller agrees that all  information  transmitted  from Buyer to Seller under
this contract  including but not limited to,  information  relating to research,
development, manufacturing, testing, accounting and marketing will be considered
confidential  information.   This  confidential  information  will  be  held  in
confidence and not disclosed to third parties by the Seller.  This  confidential
information  shall be held in  confidence by the Seller using the same degree of
care as the Seller uses in  protecting  its own  confidential  information.  The
Seller shall only use such  confidential  information for the purpose of meeting
its obligations under this Agreement.




<PAGE>



21. Destruction of Supplies

In the event that prior to the delivery of the Supplies,  the Supplies are lost,
destroyed  or  damaged  to such an extent  that  they  cannot  be  repaired  and
delivered  in  accordance  with the  delivery  schedule set forth in the Section
entitled "Installation of Supplies",  provided the event is not a willful act of
the Seller, the time reasonably  required by the Seller to furnish a replacement
for the  Supplies or to  accomplish  such  repairs  shall be deemed an Excusable
Delay under the Section entitled  "Excusable  Delay" and the Seller shall not be
deemed to be in default or to have breached its duties hereunder.



22. Excusable Delay

Notwithstanding anything to the contrary herein contained, if the performance of
this  Agreement  by any  party  or the  obligation  of any  party  hereunder  is
prevented,  restricted  or  interfered  with by reason of : i) fire,  explosion,
strike,  lockout,  labor  dispute,  casualty  or  accident,  epidemic,  cyclone,
drought,  flood or ii) war,  revolution,  riot, civil commotion,  acts of public
enemies,  blockage  or  embargo,  or iii) any law or  proclamation,  regulation,
ordinance, demand or requirement of any applicable government or any subdivision
thereof  or  representative  of any  such  government,  or iv)  any  other  acts
whatsoever,  whether  similar  or  dissimilar  to those  enumerated,  beyond the
reasonable  control of a party  hereto,  then,  and in that event,  the party so
affected  shall  promptly  notify the other  party of all  reasonable  resulting
difficulties.  Upon such notice,  the disabled party shall,  for the duration of
its disability (referred to as "Excusable Delay" in this Agreement),  be excused
from the performance of such of its obligations as are prevented, restricted, or
interfered  with  by  reason  of the  occurrence  of any  of  the  events  above
enumerated  and such  party  shall  not be deemed to be in  default  under  this
Agreement  nor be subject to any  liability  or damage.  The time period  during
which any party is to perform  under this  Agreement  shall be  extended  by the
period of any Excusable Delay. Excusable Delay under the same terms occurring in
respect to the Seller's  sub-contractors  shall be deemed to be Excusable  Delay
occurring to the Seller.

If the Seller is prevented from proceeding according to any of the schedules set
out in this Agreement by the Buyer's fault, by a delay on the part of the Buyer,

<PAGE>


or by a regulatory body with jurisdiction over the Buyer's site, or if the Buyer
delays a payment or the issuance of a Letter of Credit  pursuant to Section 3 by
more than fifteen (15) days past the due date,  then all the dates  contained in
this  Agreement  for  completion  by the Seller of its  obligations  and rights,
including but not limited to the right to exercise the accelerated  delivery and
acceptance  option,  shall be  postponed  by an  additional  period equal to the
delay.


23. Termination for Insolvency

In the event that either the Buyer or the Seller :

a) makes a general assignment for the benefit of creditors or becomes insolvent;

b) files an insolvency petition in bankruptcy;

c) petitions for or acquiesces in the  appointment  of any receiver,  trustee or
similar officer to liquidate or conserve its business or any substantial part of
its assets ;

d) commences,  under the laws of any jurisdiction,  any proceeding involving its
insolvency,  bankruptcy,   reorganization,   adjustment  of  debt,  dissolution,
liquidation  or any other  similar  proceeding  for the  release of  financially
distressed debtors ; or

e) becomes a party to any proceeding or action of the type described above in c)
or d) and such proceeding or action remains undismissed or unstayed for a period
of more than sixty (60) days,


then the other party may, by written notice, terminate this Agreement.


24. Spare Parts

The Seller agrees to make available to the Buyer,  as the Buyer may from time to
time require, ____________________,  spare parts and components to the Supplies,
and the Seller agrees to exert  reasonable  efforts to meet the Buyer's delivery
requirements  for said parts and  components  or acceptable  substitutes.  It is
understood  that the  parties  shall  negotiate  in good  faith  reasonable  and
mutually agreeable prices for said spare parts and components.




<PAGE>



25. Technical Assistance by the Seller

Immediately  following the  successful  completion of the  Acceptance  Tests the
Seller  shall send one of its  specialists  to assist the Buyer in bringing  the
cyclotron to full  operational  capacity.  The  specialist  shall be the project
coordinator  or, if he is not  available,  someone of equal or better  technical
expertise,  this other person to be approved by the Buyer,  such approval not to
be unreasonably  withheld. The Seller's specialist will remain at the site for a
period of 28 days unless the Buyer  agrees that the  services of the  specialist
are no longer required.  During this period,  the Buyer's specialist will define
the tasks to be  performed  by the  Seller's  specialist  with the  objective of
verifying  the  cyclotron  1) is fully  operational,  2) performs  according  to
specifications  within the production  environment and 3) its automated  control
system performs according to specifications. This period of technical assistance
does not relieve the Seller of any of its warranty  obligations,  including  the
requirement  that the Seller  send any  personnel  required  to the Site to make
repairs  should the  Supplies  be found to not meet  specifications  during this
period.


26. Entire Agreement

This Agreement,  made in two originals,  one for each party, contains the entire
agreement  between the parties and shall  supersede all previous  communications
and  agreements,  whether oral or written,  with  respect to the subject  matter
hereof and the provisions  hereof may not be modified or superseded except by an
instrument in writing signed by a duly authorized  officer or  representative of
each of the parties hereto.


27. Authorization

By virtue of having  affixed  their  respective  signatures  below,  each of the
parties  hereto  warrants  that it has obtained all  authorization  necessary to
enter into and perform its obligations under this Agreement.


28. Effective Date

This Agreement  shall become  effective as of the date upon which payment i), as
set forth in Section entitled  "Purchase Price of the Supplies",  is received by
the Seller.




<PAGE>



29. Disputes

With respect to any  controversy  arising out of or relating to this  Agreement,
such controversy shall be settled by final and binding  arbitration in New York,
NY,  USA,  in  accordance  with the  then-existing  rules (the  "Rules")  of the
American Arbitration Association ("AAA") and judgment upon the award rendered by
the  arbitrators  may be  entered  in any  court  having  jurisdiction  thereof;
provided,  however,  that the law applicable to any  controversy  and the law by
which this  Agreement  shall be construed  and governed  shall be the law of the
State  of New  York,  regardless  of its or  any  jurisdiction's  choice  of law
principles.  In any  arbitration,  pursuant  to this  Agreement,  the  award  or
decision  shall  be  rendered  by a  majority  of  the  members  of a  Board  of
Arbitration  consisting of three (3) members,  one of whom shall be appointed by
each  party  and the  third of whom  shall be the  Chairman  of the panel and be
appointed by mutual agreement of said two  party-appointed  arbitrators.  In the
event of failure of said two  arbitrators  to agree upon the  appointment of the
third  arbitrator   within  sixty  (60)  days  after  the  commencement  of  the
arbitration  proceeding,  the third  arbitrator shall be appointed by the AAA in
accordance  with the Rules. In the event that either party shall fail to appoint
an arbitrator  within thirty (30) days after the commencement of the arbitration
proceeding,  such arbitrator and the third  arbitrator shall be appointed by the
AAA in  accordance  with the  Rules.  The  Rules of  Evidence  and the  Right to
Discovery shall be applicable to both parties.

Work under this Agreement shall continue during the arbitration  proceedings and
payments due to the Seller shall not be withheld on account of such  proceedings
unless such  particular work or payment is the subject matter of the arbitration
in which case this provision shall not apply to such particular work or payment.

The parties agree to equally share the expenses associated with this arbitration
procedure.


30. Governing Laws

This Agreement  shall be governed by and construed in all respects in accordance
with the laws of the State of New York, USA.




<PAGE>



31. Notices

a) Any notice  given under this  Agreement  shall be made in  writing,  shall be
given by first class air mail,  telex,  telecopier or commercial cable and shall
be addressed to :

In the case of the Seller:
      Ion Beam Applications
      Chemin du Cyclotron, 3
      1348 Louvain-la-Neuve
      Belgium
      Attn : Mr. Yves Jongen
      Fax Number : 32-10-47.58.10

In the case of the Buyer :
      Theragenics Corporation
      5325, Oakbrook Parkway
      Norcross, GA 30093
      USA
      Attn : Mr. Glenn Dill
      Fax Number : 1 (404) 381 84 47

Either party,  by written  notice to the other,  may change the address to which
notices will be directed.

b) Any notice shall be deemed given on the date personally  delivered or sent by
telex,  telecopier or cable and fifteen (15) days after the date of mailing,  if
mailed.


32. Project Coordinator

Upon signing this Agreement,  both parties shall designate a representative  who
will act as Project  Coordinator  and official  addressee for all  communication
resulting from this  Agreement,  other than any official  notice given under the
Section  entitled   "Notices".   All  requests  for  service,   transmittals  of
information,  reports on training  activity,  and other  communication  required
under this  agreement  shall be sent by and directed to the  respective  Project
Coordinators. Informal conversations occurring person-to-person or by phone,

<PAGE>


requests and  information  shall be validated by an appropriate  written form as
confirmation.  Any communication sent to others than those designated as Project
Coordinators,  or in a  manner  not in  accordance  with the  Notices  procedure
specified in this Agreement will be considered as informal and non-existent.


33. Assignment

This  Agreement  shall inure to the  benefit of and be binding  upon each of the
parties hereto and their  respective  successors and assignees,  but neither the
rights nor the duties of either party hereunder may be assigned,  in whole or in
part by either party, without the prior written consent of the other party. Such
consent shall not be unreasonably withheld by either party. Any assignment shall
not relieve the assignee of any of the Agreement obligations of the assignor.


34. Headings

The headings  contained  within this  Agreement are  established  solely for the
convenience  of the  two  parties  and  are not  intended  to and do not  limit,
construe or modify any of the terms and conditions included hereof.


35. Severability

If  any  term  or  provision  of  this  Agreement  is  held  to  be  illegal  or
unenforceable, then this Agreement, except for such part or parts thereof, shall
continue to be in full force and effect.

In the event of any  inconsistency  between a provision of the conditions of the
Agreement and the content of an Appendix to this  Agreement,  and if the parties
cannot  agree on the  clause to take  precedence,  the AAA of Section 29 will be
asked to  mediate/arbitrate  the dispute  and the parties  agree to abide by the
finding of said association.



36.  Non-Waiver

The failure by either party to enforce at any time or for any period of time any
of the  provisions  hereof shall not be a waiver of such  provisions  nor of the
right of such party thereafter to enforce each and every such provision.


<PAGE>


IN WITNESS  WHEREOF,  the parties  have caused this  Agreement to be executed in
duplicate by their duly qualified officers or representatives.

THERAGENICS CORPORATION Inc.

Not Required
Christine Jacobs
President

/s/ Bruce Smith                                      /s/ Glenn Dill
Bruce Smith                                          Glenn Dill
Chief Financial Officer                              Director of Operations

ION BEAM APPLICATIONS, S.A.

/s/ Yves Jongen                                      /s/ Sabine de Voghel
Yves Jongen                                          Sabine de Voghel
President                                            Area Sales Manager




<PAGE>


                                    APPENDIX

                              CYCLOTRON PARAMETERS


<PAGE>






                                    APPENDIX


<PAGE>



                                    APPENDIX

                              BUILDING REQUIREMENTS


<PAGE>






                                    APPENDIX

                       BUILDING COMPLETION SPECIFICATIONS

<PAGE>








                                    APPENDIX

                              INCLUDED SPARE PARTS

<PAGE>


                                    APPENDIX

                               ACCEPTANCE CRITERIA

<PAGE>



                                    APPENDIX

                                ACCEPTANCE TESTS

<PAGE>


                                    APPENDIX

                   ACCELERATED DELIVERY AND ACCEPTANCE OPTION




The Buyer has the option to  request  to the  Seller,  at any time  during  this
Agreement,  to work on an  accelerated  schedule  basis  in  order  to have  the
Supplies  accepted  at an  earlier  date  than  the  scheduled  acceptance  date
of________________.  Official  request must be made in writing and  addressed to
Yves Jongen, President of IBA.

In the case the Buyer  exercises  this option,  the Buyer will pay the Seller an
additional sum of _____________ for each complete day between the actual date of
early acceptance and ____________________, including the day of _____________.




                                  EXHIBIT 10.24

                           SECOND AMENDED AND RESTATED
                           LOAN AND SECURITY AGREEMENT
                                 BY AND BETWEEN
                             THERAGENICS CORPORATION
                                       AND
                            NATIONSBANK, N.A. (SOUTH)
                          Dated as of December 9, 1996

<PAGE>


                           SECOND AMENDED AND RESTATED
                           LOAN AND SECURITY AGREEMENT


                                 by and between


                             THERAGENICS CORPORATION


                                       and


                            NATIONSBANK, N.A. (SOUTH)




                                   dated as of

                                December 9, 1996


<PAGE>


                                TABLE OF CONTENTS

SECTION 1.  GENERAL DEFINITIONS.............................................  2
           1.1.Defined Terms................................................  2
           1.2.Accounting Terms............................................. 10
           1.3.Other Terms.................................................. 10
           1.4.Certain Matters of Construction.............................. 10

SECTION 2.  REVOLVING CREDIT FACILITY....................................... 11
           2.1.Revolving Credit Loans....................................... 11
           2.2.Manner of Borrowing Revolving Credit Loans................... 12
           2.3.Loan Account................................................. 12
           2.4.Interest..................................................... 13

SECTION 3.  LETTERS OF CREDIT............................................... 16
           3.1.Amounts, Terms and Issuance of Letters of Credit............. 16
           3.2.Fees......................................................... 16
           3.3.Reimbursement Obligations Absolute........................... 16

SECTION 4. TERMINATION; PAYMENTS; FEES AND COSTS............................ 18
           4.1.Termination.................................................. 18
           4.2.Costs, Fees and Expenses..................................... 18
           4.3.Application of Payments and Collections...................... 18
           4.4.Statements of Account........................................ 19
           4.5.All Loans and Obligations to Constitute One Obligation....... 19
           4.6.Capital Adequacy............................................. 19

SECTION 5. COLLATERAL: GENERAL TERMS........................................ 20
           5.1.Security Interest in Collateral.............................. 20
           5.2.Representations, Warranties and Covenants-Collateral......... 20
           5.3.Financing Statements......................................... 21
           5.4.Cash Collateral Account...................................... 21

SECTION 6.  REPRESENTATIONS AND WARRANTIES.................................. 21
           6.1.General Representations and Warranties....................... 21
           6.2.Reaffirmation................................................ 24
           6.3.Survival of Representations and Warranties................... 24

SECTION 7.  COVENANTS AND CONTINUING AGREEMENTS............................. 25
           7.1.Affirmative Covenants........................................ 25
           7.2.Negative Covenants........................................... 28

SECTION 8.  CONDITIONS PRECEDENT............................................ 32
           8.1.Documentation................................................ 32
           8.2.Other Conditions............................................. 32

SECTION 9. EVENTS OF DEFAULT: RIGHTS AND REMEDIES ON DEFAULT................ 33
           9.1. Events of Default........................................... 33
           9.2. Acceleration of the Obligations............................. 35
           9.3. Remedies.................................................... 35
           9.4. Remedies Cumulative: No Waiver.............................. 36


<PAGE>


SECTION 10.  MISCELLANEOUS.................................................. 37
           10.1. Power of Attorney.......................................... 37
           10.2. Indemnity.................................................. 37
           10.3. Modification of Agreement: Sale of Interest................ 37
           10.4. Increased Costs............................................ 38
           10.5. Reimbursement of Expenses.................................. 39
           10.6. Indulgences Not Waivers.................................... 39
           10.7. Severability............................................... 39
           10.8. Successors and Assigns..................................... 40
           10.9. Cumulative Effect; Conflict of Terms....................... 40
           10.10.Execution in Counterparts.................................. 40
           10.11.Notices.................................................... 40
           10.12.Lender's Consent........................................... 41
           10.13.Demand Obligations......................................... 41
           10.14.Time of Essence............................................ 41
           10.15.Entire Agreement........................................... 41
           10.16.Set-Off.................................................... 41
           10.17.Governing Law: Consent to Forum............................ 41
           10.18.Waivers by Borrower........................................ 42




<PAGE>


                           SECOND AMENDED AND RESTATED
                           LOAN AND SECURITY AGREEMENT

           THIS  AGREEMENT is made as of this 9th day of December,  1996, by and
between NATIONSBANK,  N.A. (SOUTH), a Georgia banking corporation,  successor by
merger to Bank South ("Lender"),  and THERAGENICS  CORPORATION  ("Borrower"),  a
Delaware  corporation  having its chief executive  office and principal place of
business at 5325 Oakbrook Parkway, Norcross, Gwinnett County, Georgia 30093.

                               Statement of Facts

           Lender and Borrower are parties to (i) that certain Loan and Security
Agreement  dated as of June 29,  1992,  pursuant  to which  Lender  provided  to
Borrower a receivables  credit  facility in the amount of $500,000 and (ii) that
certain Loan and Security Agreement dated as of September 14, 1994,  pursuant to
which  Lender  provided  to  Borrower  a term  loan  facility  in the  amount of
$2,100,000 for, inter alia, the purchase of equipment and the  construction of a
facility located at 4875 Newton Terrace,  Buford,  Gwinnett County,  Georgia, to
house such  equipment  (such loan and security  agreements  described in (i) and
(ii) are collectively called the "Prior Loan Agreements").

           Lender and  Borrower  are also  parties to that  certain  Amended and
Restated Loan and Security Agreement dated as of December 13, 1995 (the "Amended
and Restated Loan Agreement")  pursuant to which Lender and Borrower amended and
restated in their  entireties  the Prior Loan  Agreements  and pursuant to which
Lender  increased the amount of credit  available to Borrower under the $500,000
receivables credit facility to $1,000,000 and provided to Borrower an additional
revolving credit facility of up to $4,000,000.

           Borrower desires that Lender modify the existing facilities under the
Amended  and  Restated  Loan  Agreement  to  provide  for a  single  $11,000,000
revolving  credit  facility,  and Lender is willing to do so, all in  accordance
with and subject to the terms and conditions set forth herein,  and Borrower and
Lender have agreed in connection  therewith to amend and restate the Amended and
Restated Loan Agreement in its entirety, as set forth herein.

           Borrower  acknowledges and agrees that the security  interest granted
to Lender pursuant to the Amended and Restated Loan Agreement and the other Loan
Documents (as defined in the Amended and Restated Loan Agreement),  shall remain
outstanding  and in full force and effect in  accordance  with the  Amended  and
Restated Loan Agreement and shall continue to secure the Obligations (as defined
herein).

           Borrower and Lender  acknowledge  and agree that (i) the  Obligations
(as defined herein) represent,  among other things, the amendment,  restatement,
renewal,  extension,  consolidation  and  modification  of the  Obligations  (as
defined in the Amended and Restated Loan  Agreement)  arising in connection with
the Amended and Restated Loan Agreement and the other Loan Documents (as defined
in the Amended and Restated Loan  Agreement)  executed in connection  therewith;
(ii) Borrower and Lender intend that the Amended and Restated Loan Agreement and
the other Loan Documents (as defined in the Amended and Restated Loan Agreement)
executed in connection  therewith and the collateral  pledged  thereunder  shall
secure,   without   interruption   or  impairment  of  any  kind,  all  existing
Indebtedness  under the Amended and Restated  Loan  Agreement and the other Loan
Documents  (as defined in the Amended and Restated Loan  Agreement)  executed in
connection therewith as so amended, restated,  renewed,  extended,  consolidated
and modified hereunder, together with all other obligations hereunder; (iii) all

<PAGE>


Liens  evidenced by the Amended and Restated  Loan  Agreement and the other Loan
Documents  (as defined in the Amended and Restated Loan  Agreement)  executed in
connection therewith are hereby ratified,  confirmed and continued; and (iv) the
Loan  Documents  (as defined  herein) are  intended to restate,  renew,  extend,
consolidate,  amend and modify the Amended and Restated  Loan  Agreement and the
other Loan  Documents  (as defined in the Amended and Restated  Loan  Agreement)
executed in connection therewith.

           Borrower and Lender intend that (i) the provisions of the Amended and
Restated Loan  Agreement and the other Loan Documents (as defined in the Amended
and Restated Loan  Agreement)  executed in connection  therewith,  to the extent
restated,  renewed,  extended,  consolidated,  amended and modified  hereby,  be
hereby  superseded and replaced by the  provisions  hereof and of the other Loan
Documents (as defined  herein);  (ii) the Note (as hereinafter  defined) amends,
renews,  extends,  modifies,  replaces, is substituted for and supersedes in its
entirety, but does not extinguish, the Indebtedness arising under the promissory
notes issued  pursuant to the Amended and  Restated  Loan  Agreement;  and (iii)
entering  into,  and  performing  their  respective   obligations   under,  this
transaction not constitute a novation.

           NOW, THEREFORE,  for and in consideration of the premises, the mutual
covenants  herein set forth, the sum of $10.00 in hand paid by each party hereto
to the other,  and in order to induce Lender to continue to make loans from time
to time to Borrower, as well as for other good and valuable  consideration,  the
receipt and adequacy of all of the foregoing as legally sufficient consideration
being  hereby  acknowledged,  Borrower  and Lender do hereby  agree to amend and
restate the Amended and Restated Loan Agreement as follows:

                               Statement of Terms

SECTION 1.  GENERAL DEFINITIONS

           1.1.  Defined Terms.  When used herein the following terms shall have
the following  meanings  (terms defined in the singular to have the same meaning
when used in the plural and vice versa):

                 Account  Debtor - any  Person  who is or may  become  obligated
under or on account of an Account.

                 Accounts  -  all  accounts,  contract  rights,  chattel  paper,
instruments and documents, whether now owned or hereafter created or acquired by
Borrower or in which Borrower now has or hereafter acquires any interest.

                 Adjusted  LIBOR - for any Interest  Period,  the rate per annum
(rounded upwards to the nearest 1/16th of one percentage point (if necessary) to
the quotient  obtained by dividing (x) the offered rate for United States dollar
deposits  for a period  comparable  to such  Interest  Period  appearing  on the
Reuters  Screen LIBO Page (or as quoted or  published  by such other  recognized
independent  quote service as may be selected by Lender from time to time) as of
11:00 a.m.  (Atlanta,  Georgia  time) on the date that is two (2) Business  Days
prior to the beginning of such  Interest  Period (but if at least two such rates
appear on such screen or are so quoted at such time,  the offered  rate for such
Interest  Period shall be the arithmetic mean of such rates) by (y) a percentage
equal to one (1) minus the then  average  stated  maximum  amount  (stated  as a
decimal) of all reserve requirements applicable to any member of the Federal

<PAGE>


Reserve System in respect of Eurocurrency liabilities as defined in Regulation D
of the Board of  Governors  of the  Federal  Reserve  System  (or any  successor
categories for such liabilities under such Regulation D);

                 Affiliate - a Person:  (i) which directly or indirectly through
one or more  intermediaries  controls,  or is controlled  by, or is under common
control with, Borrower, (ii) which beneficially owns or holds 10% or more of any
class of the Voting Stock of Borrower,  or (iii) 10% or more of the Voting Stock
(or in the  case of a  Person  which  is not a  corporation,  10% or more of the
equity interest) of which is beneficially owned or held, directly or indirectly,
by Borrower.  For purposes hereof,  "control" means the possession,  directly or
indirectly,  of the power to direct or cause the direction of the management and
policies of a Person, whether through the ownership of Voting Stock, by contract
or otherwise.

                 Agreement - this Second  Amended and Restated Loan and Security
Agreement, as the same may be modified or amended from time to time.

                 Business  Day - a day on  which  the  Federal  Reserve  Bank of
Atlanta is open for  business in Atlanta,  Georgia,  except  that,  when used in
connection  with a LIBOR Advance,  "Business Day" shall mean any Business Day on
which  dealings  in U.S.  dollars  between  banks may be  carried  on in London,
England and Atlanta, Georgia.

                 Capital  Expenditures - in respect of any Person,  expenditures
for the purchase of assets of long-term use which are  capitalized in accordance
with GAAP.

                 Capitalized Lease Obligation - any Indebtedness  represented by
obligations  under a lease that is  required  to be  capitalized  for  financial
reporting purposes in accordance with GAAP.

                 Cash   Collateral   Account  -  the   investment   account  no.
672-0791379803  (as  such  account  number  may be  changed  from  time to time)
established  by  Borrower  with Lender  together  with any and all monies now or
hereafter on deposit therein or credited  thereto as well as all certificates of
deposit, saving certificates,  commercial paper,  government obligations,  money
market fund shares, repurchase agreement, and other investments or securities in
which any such  monies or funds may be now or  hereafter  invested  from time to
time,  together with any and all certificates or other instruments  representing
said investments or securities,  and all interest,  distributions  and dividends
(whether in cash, stock, warrants,  options or other securities),  and all other
property  from time to time  received,  receivable or otherwise  distributed  in
respect of or in exchange for any and all of said investments or securities, and
all cash and non-cash proceeds of any of the foregoing.

                 Cash  Collateral  Account  Agreement - the Amended and Restated
Cash  Collateral  Account  Agreement dated as of December 9th, 1996 entered into
between  Borrower and Lender,  and any  amendment,  modification  or replacement
thereof.

                 CERCLA - the  meaning  ascribed  thereto in the  definition  of
Environmental Laws.

                 Closing  Date  - the  date  on  which  all  of  the  conditions
precedent in Section 8 are satisfied and the initial Loan is made hereunder.



<PAGE>


                 Code - the Uniform  Commercial  Code as adopted and in force in
the State of Georgia, as from time to time in effect.

                 Collateral  - all of the  Property  and  interests  in Property
described in Section 5 hereof,  and all other Property and interests in Property
that  now  or  hereafter  secure  the  payment  and  performance  of  any of the
Obligations.

                 Cyclotron  -  a  proton   accelerator  used  for  manufacturing
radioactive material.

                 Debt Service Coverage Ratio - for any period, (a)(i) Borrower's
EBITDA for such period,  minus (ii) taxes paid during such  period,  minus (iii)
any dividends or other  distributions  to shareholders  made during such period,
divided by (b) total principal and interest  payable on  Indebtedness  for Money
Borrowed during such period.

                 Deeds to Secure Debt - (a) the Deed to Secure Debt,  Assignment
of Rents and  Leases and  Security  Agreement  dated as of  September  14,  1992
between  Borrower  and  Lender  relating  to Land  Lot 298 of the 7th  District,
Gwinnett  County,  Georgia,  (b) the Security Deed and Agreement dated as of May
17,  1996  between  Borrower  and  Lender  relating  to Land Lot  170,  8th Land
District,  Hall County,  Georgia and in Pucketts G.M.D.  1397,  Gwinnett County,
Georgia,  (c) the  Security  Deed and  Agreement  dated as of  September 6, 1996
between  Borrower and Lender  relating to Land Lot 170, 8th Land District,  Hall
County,  Georgia and (d) any  amendments,  modifications  or replacements of the
foregoing.

                 Default - an event or condition the  occurrence of which would,
with the lapse of time or the  giving  of  notice,  or both,  become an Event of
Default.

                 EBITDA - for any period,  the Net Income of  Borrower  for such
period,  plus, without duplication and to the extent reflected as charges in the
statement  of Net  Income  for such  period,  the sum of (i) taxes  measured  by
income, (ii) Interest Expense and (iii) depreciation and amortization expense.

                 Environmental  Claims - any written notice of any  Governmental
Authority alleging  potential  liability for damage to the environment or by any
Person alleging  potential  liability for personal injury  (including  sickness,
disease or death),  in either case resulting from or based upon (a) the presence
or   Release   (including   intentional   and   unintentional,   negligent   and
non-negligent,  sudden or  non-sudden,  accidental or  non-accidental,  leaks or
spills) of any Hazardous  Substance at, in or from the property,  whether or not
owned or leased by Borrower or (b) any other circumstances  forming the basis of
any violation, or alleged violation, of any Environmental Laws.

                 Environmental Laws - all federal,  state and local laws, rules,
regulations, ordinances, programs, permits, guidance, orders and consent decrees
relating to health, safety and environmental matters, including, but not limited
to, the Resource  Conservation and Recovery Act, as amended;  the  Comprehensive
Environmental  Response,  Compensation  and  Liability  Act of 1980,  as amended
("CERCLA"),  the Toxic Substances Control Act, as amended;  the Clean Water Act,
as  amended;  the  Clean Air Act,  as  amended;  the  Superfund  Amendments  and
Reauthorization  Act of 1986,  as  amended;  state  and  federal  superlien  and
environmental  cleanup programs and laws; and U.S.  Department of Transportation
regulations.

<PAGE>



                 Equipment - equipment,  Cyclotrons,  machinery,  computers  and
computer hardware, vehicles, tools, dies and jigs, furniture, trade fixtures and
fixtures,  all  attachments,  accessories and property now or hereafter  affixed
thereto or used in connection therewith,  substitutions and replacements thereof
wherever located, whether now owned or hereafter acquired by Borrower.

                 ERISA - the Employee Retirement Income Security Act of 1974, as
amended  from  time to time,  and all rules  and  regulations  from time to time
promulgated thereunder.

                 Event of Default - as defined in Section 9.1 of this Agreement.

                 GAAP - generally accepted  accounting  principles in the United
States of America on the date  hereof,  except  that,  for  purposes  of Section
7.1(I) of this  Agreement,  such term shall mean such  principles in effect from
time to time.

                 Governmental  Authority - any Federal,  state, local or foreign
court or governmental agency, authority, instrumentality or regulatory body.

                 Hazardous  Substances  - any  toxic,  radioactive,  caustic  or
otherwise  hazardous  substance,  material or waste,  including  petroleum,  its
derivatives,  by-products and other  hydrocarbons,  or any substance  having any
constituent elements displaying any of the foregoing characteristics,  including
without   limitation,    polychlorinated   biphenyls   ("PCBs"),   asbestos   or
asbestos-containing  material,  and any substance,  waste or material  regulated
under Environmental Laws.

                 Indebtedness   -  as  applied  to  a  Person   means,   without
duplication  (i) all items  which in  accordance  with GAAP would be included in
determining  total liabilities as shown on the liability side of a balance sheet
of such  Person  as at the date as of which  Indebtedness  is to be  determined,
including,   without  limitation,   Capitalized  Lease  Obligations,   (ii)  all
obligations  of other Persons which such Person has  guaranteed and (iii) in the
case of Borrower (without duplication), the Obligations.

                 Interest Expense - for any period, interest payments accrued in
respect  to  Indebtedness  for Money  Borrowed,  together  with fees  associated
therewith  (other than fees payable on or prior to the Closing Date),  and shall
include the interest  payments for such period in respect of  Capitalized  Lease
Obligations, all as determined in accordance with GAAP.

                 Interest Period - (a) in the case of the  determination  of any
Adjusted LIBOR, a one, two, three, four, five or six month period as selected by
Borrower and (b) in the case of the  determination  of any Treasury Rate, a one,
two, three or five year period,  but (c) in the event any Interest  Period would
end on a day which is not a Business Day,  such Interest  Period shall be deemed
to end on the  immediately  succeeding  Business Day unless such extension would
cause such Interest  Period to end on the next calendar month in which case such
Interest  Period shall be deemed to end on the  immediately  preceding  Business
Day,  (d) any  Interest  Period  which  begins  on a day for  which  there is no
numerically corresponding day in the calendar month in which such Interest

<PAGE>


Period ends shall expire on the immediately preceding Business Day, and (e) with
respect to any Loans prior to the Revolving  Credit  Facility  Expiration  Date,
Borrower  shall not be  entitled to select any  Interest  Period  which  extends
beyond the Revolving Credit Facility Expiration Date and (f) with respect to any
Loans after the Revolving Credit Facility Expiration Date, Borrower shall not be
entitled to select an Interest Period which extends beyond the Maturity Date.

                 Inventory - raw materials, work in process, finished goods, and
all other inventory of whatsoever kind or nature, wherever located,  whether now
owned  or  hereafter  existing  or  acquired  by  Borrower,  including,  without
limitation, all wrapping, packaging, advertising, shipping materials, and all of
Borrower's right, title and interest therein and thereto.

                 Letter of  Credit - any  standby  letter  of  credit  issued by
Lender on the account of Borrower  pursuant to a Letter of Credit  Agreement for
the purpose of guaranteeing  Cyclotron payments and  decommissioning  costs, for
Capital Expenditures and for general corporate purposes.

                 Letter of Credit  Agreement  - any  letter of credit  agreement
between  Borrower  and Lender  with  respect to the  issuance  of the Letters of
Credit, and any amendments, modifications or replacements of the foregoing.

                 Leverage  Ratio - as of the  applicable  calculation  date, the
ratio of Borrower's Indebtedness to its Tangible Net Worth.

                 LIBOR Advance - any Loans hereunder (or portion  thereof) which
bear interest based on Adjusted LIBOR.

                 Lien - any interest in Property securing an obligation owed to,
or a claim by a Person  other  than the  owner  of the  Property,  whether  such
interest is based on the common law, statute or contract, and including, but not
limited  to,  the  security  interest,  security  title or Lien  arising  from a
security agreement,  mortgage,  deed of trust, deed to secure debt, encumbrance,
pledge,  conditional  sale or trust receipt or a lease,  consignment or bailment
for security purposes.  The term "Lien" shall include reservations,  exceptions,
encroachments,  easements, rights-of-way,  covenants, conditions,  restrictions,
leases and other title exceptions and encumbrances  affecting Property.  For the
purpose  of this  Agreement,  Borrower  shall be  deemed  to be the owner of any
Property which it has acquired or holds subject to a conditional  sale agreement
or other  arrangement  pursuant to which title to the Property has been retained
by or vested in some other Person for security purposes.

                 Loan Documents - this Agreement and the Other Agreements.

                 Loans - all loans and advances made by Lender  pursuant to this
Agreement,  including,  without  limitation,  the Revolving Credit Loans and, if
converted to term loans in accordance with this Agreement,  all Revolving Credit
Loans converted to such term loans.

                 Material  Adverse  Effect - any  materially  adverse effect (a)
upon the business, assets, liabilities, Properties, financial condition, or

<PAGE>


results of operations of Borrower, or (b) upon the ability of Borrower to ensure
performance  under this  Agreement or any other Loan  document,  or (c) upon the
rights, benefits or interests of Lender in or to this Agreement,  any other Loan
Document or the  Collateral,  in each case,  resulting  from any act,  omission,
situation, status, event, or undertaking, (other than by the gross negligence or
willful misconduct of Lender) either singly or taken together.

                 Maturity Date - June 30, 1997, or if the Revolving Credit Loans
are termed-out  pursuant to Section 2.1(B) of this  Agreement,  June 30, 2002 or
such earlier date as the  Obligations  shall become due (whether by acceleration
or otherwise).

                 Money  Borrowed  -  as  applied  to  Indebtedness,   means  (i)
Indebtedness for borrowed money; (ii)  Indebtedness,  whether or not in any such
case the same was for borrowed money,  (A) which is represented by notes payable
or drafts  accepted that evidence  extensions of credit,  (B) which  constitutes
obligations evidenced by bonds,  debentures,  notes,  reimbursement or indemnity
agreements with respect to letters of credit (only to the extent such letters of
credit guaranty obligations which do not otherwise  constitute  Indebtedness for
Money Borrowed under clauses (i) through (iv) hereof) or similar instruments, or
(C) upon which  interest  charges are  customarily  paid  (other  than  accounts
payable) or that was issued or assumed as full or partial  payment for Property;
(iii)  Indebtedness that constitutes a Capitalized  Lease  Obligation;  and (iv)
Indebtedness   under  any  guaranty  of   obligations   that  would   constitute
Indebtedness for Money Borrowed under clauses (i) through (iii) hereof.

                 Multiemployer  Plan - has the  meaning  set  forth  in  Section
4001(a)(3) of ERISA.

                 Net  Income  -  for  any  period,   net  income  determined  in
accordance with GAAP.

                 Note - the Revolving Credit Note.

                 Obligations  -  all  loans  and  all  other  advances,   debts,
liabilities,  obligations  covenants and duties owing,  arising,  due or payable
from Borrower to Lender of any kind or nature, present or future, whether or not
evidenced  by any note,  guaranty,  reimbursement  or indemnity  agreement  with
respect  to a letter  of  credit  (only to the  extent  such  letter  of  credit
guaranties obligations which do not otherwise constitute Obligations hereunder),
or other  instrument,  whether  arising under this Agreement or any of the other
Loan  Documents  or  otherwise,  whether  direct or  indirect  (including  those
acquired by assignment), absolute or contingent, primary or secondary, due or to
become due,  now existing or hereafter  arising and however  acquired.  The term
includes,  without limitation,  all interest, charges expenses, fees, attorney's
fees and any other sums chargeable to Borrower under any of the Loan Documents.

                 OSHA - the Occupational  Safety and Health Act, as amended from
time to time,  and all  rules  and  regulations  from  time to time  promulgated
thereunder.

                 Other  Agreements  - the Note,  the Deeds to Secure  Debt,  any
Letter of Credit  Agreement,  the Cash Collateral  Account Agreement and any and
all agreements, instruments and documents (other than this Agreement),

<PAGE>


heretofore,  now or  hereafter  executed by Borrower or  delivered  to Lender in
respect of the transactions contemplated by this Agreement.

                 Permitted  Liens  - any  other  Lien  of a  kind  specified  in
subparagraphs (i) through (viii) of Section 7.2(E) of this Agreement.

                 Person  -  an  individual,  partnership,  corporation,  limited
liability company, joint stock company, trust or unincorporated organization, or
a government or agency or political subdivision thereof.

                 Plan - an employee benefit plan now or hereafter maintained for
employees of Borrower that is covered by Title IV of ERISA.

                 Prime Rate - the rate of interest announced or quoted by Lender
from time to time as its Prime Rate, whether or not such rate is the lowest rate
charged by Lender to its most  preferred  borrowers;  and,  if the Prime Rate is
discontinued by Lender as a standard,  a comparable reference rate designated by
Lender as a substitute  therefor shall be the Prime Rate. After the date hereof,
such rate  shall be  increased  or  decreased,  as the case may be, by an amount
equal to any increase or decrease in the Prime Rate, with such adjustments to be
effective  as of the  opening of business on the day that any such change in the
Prime Rate becomes effective.  The Prime Rate in effect on the date hereof shall
be the Prime Rate  effective  as of the opening of business on the date  hereof,
but if this Agreement is executed on a day that is not a Business Day, the Prime
Rate in effect on the date hereof  shall be the Prime Rate  effective  as of the
opening of business on the last  Business  Day  immediately  preceding  the date
hereof.

                 Prime Rate Advance - any Loans  hereunder (or portion  thereof)
which bear interest at the Prime Rate.

                 Prohibited  Transaction - any  transaction set forth in Section
406 of ERISA or Section  4975 of the Internal  Revenue Code of 1986,  as amended
from time to time.

                 Property  - any  interest  in any kind of  property  or  asset,
whether real, personal or mixed, or tangible or intangible.

                 Purchase   Money   Indebtedness   -  means  and   includes  (i)
Indebtedness  for the  payment of all or any part of the  purchase  price of any
fixed assets,  (ii) any Indebtedness  incurred at the time of or within ten (10)
days prior to or after the  acquisition  of any fixed  assets for the purpose of
financing all or any part of the purchase price thereof, and (iii) any renewals,
extensions  or  refinancings  thereof,  but not any  increases in the  principal
amounts thereof outstanding at the time.

                 Purchase  Money Lien - a Lien upon fixed  assets  which  secure
Purchase  Money  Indebtedness,  but  only if such  Lien  shall  at all  times be
confined  solely to the fixed  assets the  purchase  price of which was financed
through the incurrence of the Purchase Money Indebtedness secured by such Lien.



<PAGE>


                 Release - any discharge,  emission, release, or threat thereof,
including a "Release" as defined in CERCLA at 42 U.S.C.  Section  9601(22);  and
the term "Released" has a meaning correlative thereto.

                 Reportable  Event - any of the  events  set  forth  in  Section
4043(b) of ERISA.

                 Restricted  Investment - any  investment in cash or by delivery
of Property to any Person, whether by acquisition of stock Indebtedness or other
obligation  or  Security,  or by  loan,  advance  or  capital  contribution,  or
otherwise,  or in any Property except the following:  (i) Property to be used in
the ordinary  course of business,  (ii) Current  Assets arising from the sale of
goods and  services  in the  ordinary  course of  business  of  Borrower;  (iii)
investments in the capital stock of Borrower, not to exceed $10,000 in aggregate
fair market value at any one time; (iv) investments in direct obligations of the
United States of America, or any agency thereof or obligations guaranteed by the
United States of America,  provided that such obligations mature within one year
from the date of acquisition thereof; (v) investments in certificates of deposit
or other time  deposits  maturing  within one year from the date of  acquisition
issued by a bank or trust company  organized under the laws of the United States
or any state thereof having capital surplus and undivided profits aggregating at
least  $100,000,000;  (vi)  investments  in  commercial  paper given the highest
rating by a national credit rating agency and maturing not more than two hundred
seventy  (270)  days  from  the  date  of  creation  thereof;  and  (vii)  other
investments made through the Cash Collateral Account.

                 Revolving Credit Facility Expiration Date - June 30, 1997.

                 Revolving Credit Facility - the facility  established  pursuant
to Section 2 of this  Agreement  pursuant to which Lender  shall make  Revolving
Credit Loans to Borrower.

                 Revolving  Credit  Loan - a Loan made by Lender as  provided in
Section 2 of this Agreement.

                 Revolving Credit Loan Account - the loan account established on
the books of Lender  pursuant  to Section  2.3 hereof and in which  Lender  will
record  all  Revolving  Credit  Loans,  payments  made on such  Loans  and other
appropriate debits and credits as provided by this Agreement.

                 Revolving  Credit Note - the Replacement  Revolving Credit Note
to be executed  by  Borrower on or about the Closing  Date in favor of Lender to
evidence the  Revolving  Credit  Loans,  which shall be in the form of Exhibit A
attached hereto,  as the same may be modified or amended from time to time after
execution and delivery thereof.

                 Revolving  Credit Maximum  Availability - $11,000,000  (as such
amount may be adjusted from time to time pursuant to this Agreement).

                 Security  - shall have the same  meaning as in Section  2(1) of
the Securities Act of 1933, as amended.



<PAGE>


                 Solvent - as to any Person, such Person (i) owns Property whose
fair  saleable  value is  greater  than the amount  required  to pay all of such
Person's  Indebtedness  (including contingent debts), (ii) is able to pay all of
its Indebtedness as such Indebtedness  matures and (iii) has capital  sufficient
to carry on its business and  transactions  and all business and transactions in
which it is about to engage.

                 Tangible  Net  Worth  -  with  respect  to  Borrower,  (i)  the
aggregate  book value of assets  (after  deduction  therefrom of all  applicable
reserves  and  allowances),  minus  (ii) net book  value of  goodwill,  patents,
franchises,  trademarks and tradename, research and development expenses and all
other  intangibles,  minus (iii) total  liabilities,  minus (iv)  advances to or
investments in Affiliates, all as determined in accordance with GAAP.

                 Term-Out  Requirements  - (i) Lender shall have  received  from
Borrower,  on or  prior  to  the  Revolving  Credit  Facility  Expiration  Date,
financial  statements for Borrower's fiscal year ending on December 31, 1996 and
financial  statements  for  Borrower's  fiscal  quarter  ending  March 31, 1997,
prepared  in  accordance   with  Sections   7.1(I)(i)  and  7.1(I)(ii)   hereof,
respectively,   and  demonstrating  Borrower's  compliance  with  the  financial
covenants  set forth in  Sections  7.2(L),  7.2(M),  7.2(N),  7.2(O)  and 7.2(R)
hereof,  (ii) Lender shall have received from Borrower a certificate dated as of
the  Revolving  Credit  Facility  Expiration  Date  (a)  reaffirming  all of the
representations  and  warranties of Borrower as contained in this  Agreement and
the other Loan Documents  except as to those changes  otherwise  consented to by
Lender or contemplated  herein and (b) certifying  compliance with all covenants
of Borrower  contained  in this  Agreement,  (iii)  Borrower  shall have paid to
Lender a term-out fee equal to .125% of the outstanding principal balance of the
Revolving Credit Loans as of the Revolving  Credit Facility  Expiration Date and
(iv) no  Default  or Event  of  Default  shall  exist  or be  continuing  on the
Revolving Credit Facility Expiration Date.

                 Treasury Rate - for any Interest Period, the rate per annum for
constant maturities of U.S. treasury bills having a term equal to the applicable
Interest  Period as published  by the Board of Governors of the Federal  Reserve
System in Statistical Release H.15(519) (or, in the event of the non-publication
of such Release,  other appropriate  Federal Reserve Board  publications of such
rate) on the date that is two (2) Business  Days prior to the  beginning of such
Interest Period.

                 Treasury  Rate  Advance  -  any  Loans  hereunder  (or  portion
thereof) which bear interest at the Treasury Rate.

           1.2. Accounting Terms. All accounting terms not specifically  defined
herein shall be construed in accordance  with GAAP  consistent with that applied
in preparation of the financial  statements  referred to in Section 6.l(K),  and
all financial  data  pursuant to the  Agreement  shall be prepared in accordance
with such principles.

           1.3.  Other Terms. All other terms  contained in this Agreement shall
have,  when the context so indicates,  the meanings  provided for by the Code to
the extent the same are used or defined therein.

           1.4.  Certain Matters of Construction.  The terms "herein",  "hereof"
and  "hereunder"  and other words of similar import refer to this Agreement as a
whole and not to any particular section,  paragraph or subdivision.  Any pronoun

<PAGE>


used shall be deemed to cover all genders. The section titles, table of contents
and list of exhibits appear as a matter of convenience only and shall not affect
the interpretation of this Agreement.

SECTION 2.  REVOLVING CREDIT FACILITY

           Subject  to the terms and  conditions  of, and in  reliance  upon the
representations  and  warranties  made in,  this  Agreement  and the other  Loan
Documents,  Lender shall make a revolving credit facility of up to the Revolving
Credit  Maximum  Availability  available  to Borrower  upon  Borrower's  request
therefor, as follows:

           2.1.  Revolving Credit Loans.

                 (A)  Subject  to the terms and  conditions  of this  Agreement,
Lender shall make Revolving  Credit Loans to Borrower from time to time prior to
the Revolving  Credit  Facility  Expiration Date in accordance with the terms of
Section  2.2  hereof up to a maximum  principal  amount at any time  outstanding
equal to the Revolving Credit Maximum  Availability.  The Revolving Credit Loans
shall be evidenced by the Revolving Credit Note. It is expressly  understood and
agreed  that the  Revolving  Credit  Maximum  Availability  shall be the maximum
ceiling on Revolving  Credit Loans  outstanding to Borrower at any time.  Lender
shall not be  obligated  to make  Revolving  Credit Loans at any time that there
exists a Default or an Event of Default or at any time on or after the Revolving
Credit  Facility  Expiration  Date.   Notwithstanding  anything  herein  to  the
contrary,  the  sum  of  the  aggregate  outstanding  principal  balance  of the
Revolving  Credit Loans at any one time plus the aggregate  stated amount of all
Letters of Credit then  outstanding may not exceed the Revolving  Credit Maximum
Availability as then in effect.

                 (B) On the  Revolving  Credit  Facility  Expiration  Date,  the
entire unpaid  balance of the  Revolving  Credit Loans shall be due and payable;
provided,  however,  that if Borrower meets all of the Term-Out  Requirements on
the Revolving Credit Facility Expiration Date, the outstanding principal balance
of the  Revolving  Credit Loans  automatically  shall  term-out on the Revolving
Credit Facility Expiration Date without any further action by Borrower or Lender
and the  outstanding  principal  balance of the Revolving  Credit Loans shall be
payable (and interest shall accrue and be payable thereon) as follows:

                     (i) Interest  shall accrue at the rates per annum set forth
in Section 2.4(C) hereof.

                     (ii) The  outstanding  principal  balance on the  Revolving
Credit Facility Expiration Date shall be payable in sixty (60) equal consecutive
installments,  commencing on July 31, 1997 and  continuing to be due on the same
day of each succeeding  month  thereafter until June 30, 2002, at which time all
unpaid principal and accrued interest shall be due and payable in full.

                     (iii) Accrued  interest on the Revolving  Credit Note shall
be due and  payable  monthly  in arrears on the last day of each month for Prime
Rate Advances and Treasury Rate  Advances,  and on the last day of each Interest
Period for LIBOR  Advances;  provided,  however,  that for any LIBOR Advance for
which the Interest  Period is in excess of one month,  interest shall be due and
payable on the last day of each month during the term of such Interest Period as
the day on which such LIBOR Advance was made.



<PAGE>


                 (C) Borrower may prepay the Revolving  Credit Loans in whole or
in part in accordance with the terms and conditions of Section 2.4 hereof.

                 (D) If the unpaid balance of the Revolving  Credit Loans should
exceed the Revolving  Credit Maximum  Availability,  or any other limitation set
forth  in  this  Agreement,  such  Revolving  Credit  Loans  shall  nevertheless
constitute  Obligations  that are secured by the  Collateral and entitled to all
benefits thereof.

                 (E) Insofar as  Borrower  may request and Lender may be willing
in its sole and absolute  discretion to make Revolving  Credit Loans to Borrower
at a time when the unpaid balance of Revolving  Credit Loans  exceeds,  or would
exceed with the making of such  Revolving  Credit  Loan,  the  Revolving  Credit
Maximum   Availability  (any  such  Loan  or  Loans  being  herein  referred  to
individually as a "Revolving Credit  Overadvance" and collectively as "Revolving
Credit Overadvances"),  Lender shall enter such Revolving Credit Overadvances as
debits in the Loan Account. All Revolving Credit Overadvances shall be repaid on
demand and shall be evidenced by the Revolving Credit Note.

                 (F)  The  Revolving  Credit  Loans  shall  be used  solely  for
Borrower's  general  corporate  needs,  Capital  Expenditures  and  real  estate
purchases,  all to the  extent  not  inconsistent  with the  provisions  of this
Agreement.

           2.2.  Manner  of  Borrowing  Revolving Credit Loans. Borrowings under
the Revolving Credit Facility established  pursuant  to  Section 2.1 shall be as
follows:

                 (A) A request  for a Revolving  Credit  Loan shall be made,  or
shall be deemed to be made, in the  following  manner:  (i) Borrower  shall give
Lender  written  notice (or  telephonic  notice  promptly  confirmed in writing)
substantially in the form of Exhibit C attached hereto,  signed by an authorized
officer of  Borrower,  provided  that in the case of Prime Rate  Advances,  such
notice  shall be given to Lender not later than  10:00  a.m.  (Atlanta,  Georgia
time) on the Business Day of the date of a proposed  Prime Rate Advance,  in the
case of LIBOR  Advances,  such notice  shall be given to Lender at least two (2)
Business Days prior to the date of a proposed LIBOR Advance,  and in the case of
Treasury Rate  Advances,  such notice shall be given to Lender at least five (5)
Business Days prior to the date of a proposed Treasury Rate Advance, and further
provided  that any notice given to Lender  under this Section  shall be given to
Lender prior to 10:00 a.m.  (Atlanta,  Georgia  time) in order for such Business
Day to count  towards the minimum  number of Business  Days  required;  (ii) the
becoming due of any other Obligation, to the extent not paid by Borrower, on the
due date thereof,  after giving effect to any applicable grace periods, shall be
deemed,  at  Lender's  discretion,  irrevocably  to be a request for a Revolving
Credit Loan on the due date in the amount then so due and (iii)  pursuant to the
terms of Borrower's Autoborrow account or similar account with Lender.

                 (B) Borrower hereby  irrevocably  authorizes Lender to disburse
the proceeds of each Revolving Credit Loan requested, or deemed to be requested,
pursuant  to this  Section 2.2 as follows:  (i) the  proceeds of each  Revolving
Credit Loan requested  under Section  2.2(A)(i)  shall be disbursed by Lender in
lawful money of the United States of America in immediately  available funds, in
the case of the initial  borrowing,  in accordance with the terms of the written
disbursement letter from Borrower, and in the case of each subsequent borrowing,
by wire  transfer to such bank  account as may be agreed  upon by  Borrower  and
Lender  from time to time and (ii) the  proceeds of each  Revolving  Credit Loan
requested under Section 2.2(A)(ii) shall be disbursed by Lender by way of direct
payment of the relevant Obligation.



<PAGE>


           2.3. Loan Account.  Lender shall enter all Revolving  Credit Loans as
debits  to the  Revolving  Credit  Loan  Account  and shall  also  record in the
Revolving  Credit Loan Account all payments made by Borrower on Revolving Credit
Loans and all proceeds of Collateral  which are finally paid to Lender,  and may
record therein, in accordance with customary  accounting  practice,  all charges
and expenses properly chargeable to Borrower hereunder.

           2.4.  Interest.

                 (A)  Calculation.  Interest  shall accrue and be payable on the
principal  amount of the  Revolving  Credit Loans  calculated  on the basis of a
360-day  year for the  actual  number of days  elapsed,  at the rate or rates of
interest set forth below. In computing interest on any Loan hereunder,  the date
of making the Loan shall be included  and the date of payment  shall be excluded
(except when a Loan is continued or converted as a new Loan under Section 2.4(E)
hereof on such date of payment). Any payment received after 12:00 p.m. (Atlanta,
Georgia  time) on any  Business  Day shall be deemed  received on the  following
Business Day.

                 (B) Interest Rate Prior to Revolving Credit Facility Expiration
Date.  From the date  hereof  until (but not  including)  the  Revolving  Credit
Facility  Expiration Date, the unpaid principal  balance of the Revolving Credit
Loans shall bear interest at a rate per annum equal to the Prime Rate; provided,
however,  that  Borrower  may,  by a written  notice  (or by  telephonic  notice
promptly  confirmed  in  writing)  delivered  to Lender  not later than 10:00 am
(Atlanta,  Georgia time) on the second Business Day prior to any Interest Period
designated by Borrower in such notice, direct that interest accrue on the unpaid
principal balance of the Revolving Credit Loans (or any portion thereof which is
in an amount of not less than $250,000 or any greater integral multiple thereof)
outstanding  from time to time during such  Interest  Period at a rate per annum
equal to the sum of the  Adjusted  LIBOR for such  Interest  Period plus two (2)
percentage points (2.0%),  provided,  however,  that (i) upon the occurrence and
during the  continuation  of any Event of Default,  Lender  may,  upon notice to
Borrower,  suspend  Borrower's right to use the aforesaid Adjusted LIBOR option,
and (ii) Borrower may not have more than four (4) Adjusted  LIBOR-based interest
rates in effect  hereunder at any one time. Each such designation by Borrower of
an interest rate for the Revolving  Credit Loans based on the Adjusted LIBOR and
of an Interest Period  applicable  thereto shall be irrevocable and shall remain
in effect  throughout such Interest  Period.  Upon determining any interest rate
based on the Adjusted LIBOR for an Interest Period requested by Borrower, Lender
shall  notify the  Borrower by  telephone  (which may be confirmed in writing by
Lender) of such determination,  and such determination  shall, in the absence of
manifest error, be final, conclusive and binding for all purposes.

                 (C) Interest Rate After Revolving  Credit  Facility  Expiration
Date. If Borrower does not pay in full the outstanding  principal balance of the
Revolving  Credit Loans on the Revolving  Credit  Facility  Expiration  Date and
repayment of the Revolving  Credit Loans is extended  pursuant to Section 2.1(B)
hereof,  then,  commencing on the Revolving Credit Facility Expiration Date, the
unpaid principal  balance of the Revolving Credit Loans shall bear interest at a
rate per annum equal to the Prime Rate; provided, however, that Borrower may, by
a written  notice  (or by  telephonic  notice  promptly  confirmed  in  writing)
delivered  to Lender  not later  than 10:00 am  (Atlanta,  Georgia  time) on the
second Business Day prior to the commencement of any Interest Period  designated
by Borrower in such notice,  direct that interest accrue on the unpaid principal
balance of the  Revolving  Credit Loans (or any portion  thereof  which is in an
amount of not less than $250,000 or any greater integral multiple thereof in the
case of LIBOR Advances, and in an amount not less than $1,000,000 or any greater

<PAGE>


integral amount thereof in the case of Treasury Rate Advances)  outstanding from
time to time during such Interest Period at a rate per annum equal to either (a)
the sum of the  Adjusted  LIBOR for such  Interest  Period  plus the  Applicable
Interest  Rate Margin in effect from time to time and as more fully set forth in
Section  2.4(D)  below or (b) the sum of the  Treasury  Rate  for such  Interest
Period plus the Applicable  Interest Rate Margin in effect from time to time and
as more fully set forth in Section 2.4(D) below.

                 (D)  Applicable   Interest  Rate  Margin.   Commencing  on  the
Revolving Credit Facility  Expiration Date, the Applicable  Interest Rate Margin
for LIBOR  Advances or Treasury Rate Advances  shall be the interest rate margin
determined by Lender based upon Borrower's  Debt Service  Coverage Ratio for the
four (4) quarter period ending on the last day of the most recent fiscal quarter
for which financial statements have been provided to Lender, effective as of the
second  Business  Day after the  financial  statements  referred  to in Sections
7.1(I)(i) and 7.1(I)(ii)  hereof,  and an accompanying  certificate of the chief
financial  officer of  Borrower  in the form of Exhibit B attached  hereto,  are
delivered  by Borrower to Lender for the fiscal  quarter  most  recently  ended,
expressed as a per annum rate of interest as follows:

 -------------------------------- =============================================
 If Borrower's Debt Service       Then, the Applicable Interest Rate Margin
 Coverage Ratio is:               shall be:
 -------------------------------  =============================================
 Less than 2.0 to 1.0             2.250% for LIBOR Advances
                                                OR
                                  2.500% for Treasury Rate Advances
 ================================ =============================================
 Greater than 2.0 to 1.0 but      2.125% for LIBOR Advances
 Less than 2.5 to 1.0                           OR
                                  2.375% for Treasury Rate Advances
 ================================ =============================================
 Greater than 2.5 to 1.0 but      2.000% for LIBOR Advances
 Less than 3.0 to 1.0                           OR
                                  2.250% for Treasury Rate Advances
 ================================ =============================================
 Greater than 3.0 to 1.0 but      1.875% for LIBOR Advances
 Less than 3.5 to 1.0                           OR
                                  2.125% for Treasury Rate Advances
 ================================ =============================================
 Greater than 3.5 to 1.0          1.750% for LIBOR Advances
                                                OR
                                  2.000% for Treasury Rate Advances
 ================================ =============================================

In the event that Borrower fails to timely provide the financial  statements and
certificate referred to above in accordance with the terms of Sections 7.1(I)(i)
and 7.1(I)(ii)  hereof,  and without  prejudice to any  additional  rights under
Section  9.3 hereof or  otherwise,  no  downward  adjustment  of the  Applicable
Interest Rate Margin in effect for the  preceding  quarter shall occur until the
actual delivery of such financial statements and certificate.

                 (E) Conversions and Continuations.

                     (i) Borrower may on any Business Day, subject to the giving
of a proper Notice of  Conversion/Continuation  as hereinafter described,  elect
(A) to continue  all or any part of a LIBOR  Advance by selecting a new Interest
Period therefor, to commence on the last day of the immediately preceding

<PAGE>


Interest  Period,  or (B)  subject  to the  availability  of  interest  rates as
provided in Sections  2.4(B),  2.4(C) and 2.4(D)  hereof,  to convert all or any
part of a Loan of one type into a Loan of another type; provided,  however, that
Lender shall not be obligated to convert any  outstanding  Loan into or continue
any outstanding Loan as a LIBOR Advance when any Default or Event of Default has
occurred and is continuing.  Any conversion of a LIBOR Advance into a Prime Rate
Advance  shall be made on the last day of the  Interest  Period  for such  LIBOR
Advance.

                     (ii) Whenever Borrower desires to convert or continue Loans
under  Section  2.4(E)(i),   Borrower  shall  give  Lender  written  notice  (or
telephonic  notice promptly  confirmed in writing)  substantially in the form of
Exhibit  D,  signed by an  authorized  officer  of  Borrower,  on the  requested
conversion  date by 10:00  a.m.  in the case of a  conversion  into a Prime Rate
Advance,  by 10:00 a.m.  at least two (2)  Business  Days  before the  requested
conversion or continuation date in the case of a conversion into or continuation
of a LIBOR  Advance and by 10:00 a.m. at least five (5) Business Days before the
requested  conversion  or  continuation  date  in the  case of a  Treasury  Rate
Advance.  Each such Notice of  Conversion/Continuation  shall be irrevocable and
shall  specify the  aggregate  principal  amount of the Loans to be converted or
continued,  the  date of such  conversion  or  continuation  (which  shall  be a
Business Day) and whether the Loans are being  converted  into or continued as a
LIBOR  Advance or a Treasury  Rate  Advance  (and,  if so, the  duration  of the
Interest Period to be applicable  thereto) or a Prime Rate Advance.  If upon the
expiration of any Interest  Period in respect of any LIBOR Advance or a Treasury
Rate   Advance,   Borrower   shall  have   failed  to  deliver   the  Notice  of
Conversion/Continuation,  Borrower  shall be deemed to have  elected  to convert
such LIBOR Advance or Treasury Rate Advance to a Prime Rate Advance.

                 (F) Upon Default. During the existence of any Event of Default,
the unpaid  principal  balance of the Revolving  Credit Loans and, to the extent
permitted by law, the accrued  interest  balance of the  Revolving  Credit Loans
shall  bear  interest  on each day until paid at the higher of the Prime Rate or
the interest rate otherwise in effect under this Agreement, plus in either case,
in Lender's  discretion,  up to an additional two percentage points (2.0%),  but
only to the extent that payment of such  interest on such  principal or interest
is enforceable under applicable law.

                 (G)  Prepayments.  All payments or prepayments on the Revolving
Credit Loans shall be applied first to interest  accrued on the Revolving Credit
Loans through the date of such payment or prepayment and then to principal (and,
if principal  is then payable in  installments,  partial  principal  prepayments
shall be applied to such installments in the inverse order of their maturity).

                 (H) Reimbursement.  Notwithstanding  anything in this Agreement
or the other Loan Documents to the contrary,  a prepayment of any portion of the
principal  balance of the Revolving  Credit Loans which is then outstanding as a
LIBOR Advance or a Treasury Rate Advance may be made without penalty by Borrower
only on the last day of the Interest Period applicable  thereto and, if any such
prepayment is made on a day that is not the last day of the applicable  Interest
Period,  Borrower  shall pay to Lender,  upon  Lender's  written  request to the
Borrower  therefor  (which  request shall set forth the basis for the request of
such payment in reasonable  detail and, in the absence of manifest error,  shall
be final, conclusive and binding on Lender and Borrower), an amount equal to any
and all losses,  expenses and liabilities  (including,  without limitation,  any
interest paid by Lender to the extent not recovered by the Lender in connection

<PAGE>


with its  re-employment  of the  prepaid  funds)  which  Lender may sustain as a
result of such  prepayment.  The  calculation of any and all amounts  payable to
Lender with  respect to any portion of the  principal  balance of the  Revolving
Credit Loans  outstanding  as LIBOR  Advances shall be made as though Lender had
actually  funded such  portion  through  the  purchase of deposits in the London
interbank market;  provided,  however,  that Lender may fund such portion of the
Revolving  Credit Loans in any manner it sees fit and the foregoing  assumptions
shall be used only for  calculation  of amounts  which may be payable  under the
Revolving Credit Loans.

                 (I)  Maximum   Interest   Rate.  In  no  contingency  or  event
whatsoever shall the aggregate of all amounts deemed interest hereunder or under
the Revolving Credit Note and charged or collected pursuant to the terms of this
Agreement  or pursuant  to the  Revolving  Credit  Note exceed the highest  rate
permissible  under any law which a court of competent  jurisdiction  shall, in a
final  determination,  deem  applicable  hereto.  In the event that such a court
determines that Lender has charged or received  interest  hereunder in excess of
the highest  applicable rate,  Lender shall promptly refund such excess interest
to Borrower  and such rate shall  automatically  be reduced to the maximum  rate
permitted by such law.

SECTION 3.  LETTERS OF CREDIT  LETTERS OF CREDIT LETTERS OF CREDIT

           3.1.  Amounts, Terms and Issuance of Letters of Credit.

           If  requested to do so by  Borrower,  Lender may, in its  discretion,
issue one or more  Letters of Credit  for the  account  of  Borrower;  provided,
however  that the sum of the  aggregate  outstanding  principal  balance  of the
Revolving  Credit Loans at any one time plus the aggregate  stated amount of all
Letters of Credit  then  outstanding  may not  exceed  the sum of the  Revolving
Credit  Maximum  Availability  as then in effect and any amounts  paid by Lender
with respect to any draw under any such Letter of Credit shall be deemed to be a
Revolving  Credit  Loan and  shall  bear  interest  and  shall be  repayable  in
accordance  with the terms hereof and of the  Revolving  Credit Note unless such
amount is immediately reimbursed by Borrower on demand therefor by Lender.

           3.2.  Fees.

           Borrower  shall  pay to Lender  for the  issuance  of each  Letter of
Credit on or after the date hereof a fee in the amount of one and one quarter of
one percent (1.25%) per annum of the face amount of such Letter of Credit, which
fee shall be payable in full on the issuance of such Letter of Credit.  Borrower
shall also pay or reimburse  Lender for normal and  customary  costs or expenses
incurred by Lender in issuing,  effecting  payment under,  amending or otherwise
administering the Letters of Credit.

           3.3.  Reimbursement Obligations Absolute.

           Borrower  agrees  that any  action  taken or  omitted  to be taken by
Lender in  connection  with any  Letter of Credit,  except  for such  actions or
omissions as shall constitute gross negligence or willful misconduct on the part
of Lender,  shall be binding on Borrower  as between  Borrower  and Lender,  and
shall not result in any  liability  of Lender to  Borrower.  The  obligation  of
Borrower  to  reimburse  Lender for a drawing  under any Letter of Credit or for
advances  made by Lender on account  of draws  made under the  Letters of Credit
shall be absolute,  unconditional and irrevocable, and shall be paid strictly in
accordance with the terms of this Agreement under all circumstances  whatsoever,
including, without limitation, the following circumstances:



<PAGE>


                 (A)  Any  lack  of  validity  or  enforceability  of  any  Loan
Document;

                 (B) Any amendment or waiver of or consent to any departure from
any or all of the Loan Documents;

                 (C) Any  improper use which may be made of any Letter of Credit
or any improper acts or omissions of any beneficiary or transferee of any Letter
of Credit in connection therewith;

                 (D) The existence of any claim,  set-off,  defense or any right
which Borrower may have at any time against any beneficiary or any transferee of
any  Letter of Credit  (or  Persons  for whom any such  beneficiary  or any such
transferee  may be acting),  Lender or any other  Person,  whether in connection
with any Letter of Credit, any transaction contemplated by any Letter of Credit,
this Agreement, or any other Loan Document, or any unrelated transaction;

                 (E) Any statement or any other  documents  presented  under any
Letter of Credit proving to be  insufficient,  forged,  fraudulent or invalid in
any respect or any  statement  therein being untrue or inaccurate in any respect
whatsoever,  provided  that  such  payment  shall  not  have  constituted  gross
negligence or willful misconduct of Lender;

                 (F) The  insolvency  of any Person  issuing  any  documents  in
connection with any Letter of Credit;

                 (G)  Any  breach  of any  agreement  between  Borrower  and any
beneficiary or transferee of any Letter of Credit;

                 (H) Any  irregularity in the transaction  with respect to which
any Letter of Credit is issued,  including any fraud by the  beneficiary  or any
transferee of such Letter of Credit,  provided that such  transaction  shall not
have constituted gross negligence or willful misconduct of Lender;

                 (I)  Any  errors,   omissions,   interruptions   or  delays  in
transmission or delivery of any messages, by mail, cable, telegraph, wireless or
otherwise,  whether or not they are in code, provided that such error, omission,
interruption or delay shall not have been caused by gross  negligence or willful
misconduct of Lender;

                 (J) Any act, error, neglect or default, omission, insolvency or
failure of business of any of the correspondents of Lender;

                 (K) Any other  circumstances  arising  from  causes  beyond the
control of Lender; and

                 (L) Any other circumstance or happening whatsoever,  whether or
not similar to any of the foregoing,  provided that such other  circumstances or
happenings  shall  not have  been the  result  of gross  negligence  or  willful
misconduct of Lender.



<PAGE>


SECTION 4. TERMINATION; PAYMENTS; FEES AND COSTS

           4.1.  Termination.

                 (A) Upon at least  thirty  (30) days  prior  written  notice to
Lender,  Borrower  may,  at its  option,  terminate  this  Agreement,  provided,
however,  no such termination  shall be effective until Borrower has paid all of
the  Obligations  in  immediately  available  funds and there are no  Letters of
Credit still issued and outstanding.

                 (B)  Lender  may  terminate  this  Agreement  at any time  upon
written notice to Borrower upon the occurrence and during the continuation of an
Event of Default.

                 (C) All of the  Obligations  arising  hereunder or evidenced by
the Note  shall be  forthwith  due and  payable  upon  any  termination  of this
Agreement.  Except as otherwise  expressly provided for in this Agreement or the
other Loan  Documents,  no termination or  cancellation  (regardless of cause or
procedure) of this Agreement or any of the other Loan Documents shall in any way
affect or impair the powers,  obligations,  duties,  rights,  and liabilities of
Borrower or Lender in any way relating to (i) any transaction or event occurring
prior to such  termination or  cancellation,  including  without  limitation any
Letters  of  Credit  which  may  be  still  outstanding,  or  (ii)  any  of  the
undertakings,  agreements,  covenants, warranties or representations of Borrower
contained  in this  Agreement,  or any of the  other  Loan  Documents.  All such
undertakings,   agreements,  covenants,  warranties  and  representations  shall
survive such  termination or  cancellation  and Lender shall retain its Liens in
the Collateral,  and all of its rights and remedies under this Agreement and the
other Loan Documents  notwithstanding  such  termination or  cancellation  until
Borrower has paid the Obligations to Lender,  in full, in immediately  available
funds.

                 (D) It is understood  that Borrower may elect to terminate this
Agreement in its entirety  only. No section of this  Agreement may be terminated
singly.

           4.2.  Costs, Fees and Expenses

                 (A) On the date of this Agreement,  Borrower shall pay Lender a
non-refundable  closing fee for the Revolving  Credit  Facility in the amount of
$13,750.00,  which  closing  fee  shall be fully  earned  when due and  shall be
non-refundable when paid.

                 (B) Borrower  shall pay to Lender an unused  commitment  fee on
the aggregate unused amount of the Revolving Credit Maximum  Availability (which
will  accrue  from the date  hereof)  at a rate of .2% per  annum.  Such  unused
commitment fee shall be computed on the basis of a hypothetical year of 360 days
for the actual number of days elapsed,  shall be payable quarterly in arrears on
the last day of each fiscal quarter,  commencing on December 31, 1996 and on the
Revolving  Credit Facility  Expiration Date, shall be fully earned when due, and
shall be non-refundable when paid.

                 (C) Costs, fees and expenses payable pursuant to this Agreement
shall be  payable  by  Borrower,  on  demand,  to Lender or to any other  Person
designated by Lender in writing.

           4.3.  Application of Payments and Collections.  Borrower  irrevocably
waives  the  right  to  direct  the  application  of any  and all  payments  and
collections at any time or times hereafter  received by Lender from or on behalf
of Borrower,  and Borrower does hereby  irrevocably agree that Lender shall have

<PAGE>


the  continuing  exclusive  right to apply and reapply any and all such payments
and  collections  received at any time or times hereafter by Lender or its agent
against  the  Obligations,   in  such  manner  as  Lender  may  deem  advisable,
notwithstanding any entry by Lender upon any of its books and records. If as the
result of  collections  of Accounts  as  authorized  by this  Agreement a credit
balance  exists in the Loan  Account,  such  credit  balance  shall  not  accrue
interest in favor of Borrower, but shall be available to Borrower at any time or
times for so long as no Default or Event of  Default  exists.  Lender may offset
such credit balance upon or after the occurrence of an Event of Default.

           4.4.  Statements of Account.  Lender will account to Borrower monthly
with a statement of Loans, Letters of Credit, charges and payments made pursuant
to this  Agreement and such account  rendered by Lender shall  (absent  manifest
error) be deemed final,  binding and conclusive  upon Borrower  unless Lender is
notified by Borrower in writing to the contrary  within  thirty (30) days of the
date each  account was sent to  Borrower  at its  address  set forth  herein for
notices.  Such  notice  shall  only  be  deemed  an  objection  to  those  items
specifically objected to therein.

           4.5. All Loans and  Obligations  to Constitute  One  Obligation.  The
Loans (including without  limitation any and all Revolving Credit  Overadvances)
shall  constitute  one general  obligation of Borrower,  and shall be secured by
Lender's  security  interest in and Lien upon all of the Collateral,  and by all
other  security  interests  and  Liens  heretofore,  now or at any time or times
hereafter granted by Borrower to Lender.

           4.6. Capital Adequacy.  Without limiting any other provisions of this
Agreement,  in the event that Lender  determines  after the date hereof that the
introduction  or change  after the date of this  Agreement  of any law,  treaty,
governmental  (or  quasi-governmental)  rule,  regulation,  guideline  or  order
regarding  capital adequacy,  or any change therein or in the  interpretation by
any governmental  authority or application thereof by any governmental authority
after the date of this  Agreement,  or  compliance by Lender with any request or
directive regarding capital adequacy (whether or not having the force of law and
whether or not failure to comply  therewith  would be  unlawful)  from a central
bank or governmental  authority or body having jurisdiction over Lender which is
introduced or changed after the date of this  Agreement,  does or shall have the
effect of reducing the rate of return on Lender's  capital as a  consequence  of
its obligations hereunder to a level below that which Lender could have achieved
but for such law, treaty, rule, regulation, guideline or order or such change or
compliance (taking into consideration  Lender's policies with respect to capital
adequacy and  assuming  the full  utilization  of Lender's  capital  immediately
before such adoption,  change or compliance) by an amount  reasonably  deemed by
Lender to be material,  then Lender shall  promptly after its  determination  of
such occurrence notify Borrower thereof. The Borrower agrees to pay to Lender as
an additional  fee from time to time,  within ten (10) days after written notice
and demand by Lender, such amount as Lender certifies to be the amount that will
compensate it for such reduction in connection with its obligations hereunder. A
certificate  of  Lender  claiming  compensation  under  this  Section  shall  be
conclusive  in the  absence of  manifest  error or fraud and shall set forth the
nature of the occurrence giving rise to such compensation, the additional amount
or amounts to be paid to it hereunder  and the method by which such amounts were
determined.  In determining such amount, Lender may use reasonable averaging and
attribution methods.



<PAGE>


SECTION 5. COLLATERAL: GENERAL TERMS

           5.1.  Security  Interest in Collateral.  To secure the prompt payment
and performance to Lender of the Obligations, Borrower hereby grants to Lender a
continuing  security  interest in and Lien upon all the  following  Property and
interests  in Property of  Borrower,  whether now owned or existing or hereafter
created, acquired or arising and wheresoever located:

                 (A) All Accounts;

                 (B) All monies and other  Property  of any kind,  now or at any
time or times  hereafter,  in the possession or under the control of Lender or a
bailee of Lender, including, without limitation the Cash Collateral Account;

                 (C) All Equipment, including, without limitation, the Equipment
described on Schedule 5.1(C) attached hereto;

                 (D) All Inventory including,  without limitation, the Inventory
described on Schedule 5.1(D) attached hereto;

                 (E) All of the  real  property  described  on  Schedule  5.1(E)
attached hereto, including,  without limitation,  all easements,  tenements, all
buildings,  structures  and  improvements  now or  hereafter  placed on the real
property, and all fixtures now or hereafter installed,  located therein, and all
appurtenances thereto, thereon or therein.

                 (F) All substitutions  for and all  replacements,  products and
cash and non-cash proceeds of any of the Collateral  described in (A), (B), (C),
(D) or  (E)  above,  including,  without  limitation,  proceeds  of any of  such
Collateral; and

                 (G) All  books  and  records  (including,  without  limitation,
customer lists, credit files, computer programs,  print-outs, and other computer
materials and records) of Borrower pertaining to any of the Collateral described
in (A), (B), (C), (D), (E) or (F) above.

           5.2.  Representations, Warranties and Covenants-Collateral. To induce
Lender  to  enter  into  this  Agreement,  Borrower  represents,  warrants,  and
covenants to Lender.

                 (A) Borrower has good and marketable  title to and ownership of
the  Collateral.  No other Person has or will have any right,  title,  interest,
claim, or Lien therein, thereon or thereto other than a Permitted Lien.

                 (B) The Liens granted to Lender shall be first and prior on the
Collateral and as to the Accounts and proceeds,  including  insurance  proceeds,
resulting from the sale, disposition, or loss thereof.

                 (C)  Borrower  shall pay and  discharge  when due or within any
period when payment may be made  without  penalty all taxes,  levies,  and other
charges (except those being  contested in good faith by appropriate  proceedings
and for which  appropriate  reserves have been established) upon said Collateral
and upon the goods evidenced by any documents constituting  Collateral and shall
defend  Lender  against and save it harmless  from all claims of any Person with
respect to the Collateral  except that Borrower's  failure to pay any such taxes
shall not be deemed an Event of Default so long as Borrower's failure to pay any
such  taxes has not given  rise to a Lien  other  than a  Permitted  Lien.  This

<PAGE>


indemnity shall include reasonable attorneys' fees and legal expenses.

           5.3. Financing  Statements.  Borrower agrees to execute the financing
statements provided for by the Code together with any and all other instruments,
assignments  or documents and shall take such other action as may be required to
perfect or to  continue  the  perfection  of Lender's  security  interest in the
Collateral.  Unless  prohibited by applicable law,  Borrower  hereby  authorizes
Lender to execute and file any such  financing  statement on Borrower's  behalf.
The parties  agree that a carbon,  photographic  or other  reproduction  of this
Agreement  shall be sufficient as a financing  statement and may be filed in any
appropriate office in lieu thereof.

           5.4.  Cash Collateral  Account. The Obligations also shall be secured
by  the  Cash  Collateral  Account  pursuant  to  the  Cash  Collateral  Account
Agreement.

SECTION 6.  REPRESENTATIONS AND WARRANTIES

           6.1.  General  Representations  and  Warranties.  To induce Lender to
enter into this  Agreement and to make advances  hereunder,  Borrower  warrants,
represents and covenants to Lender that:

                 (A) Organization and  Qualification.  Borrower is a corporation
duly  organized,  validly  existing and in good  standing  under the laws of the
State of Delaware.  Borrower has duly qualified and is authorized to do business
and is in good standing as a foreign  corporation in each state or  jurisdiction
listed on  Schedule  6.1(A)  attached  hereto and made a part  hereof and in all
other states and  jurisdictions  where the  character of its  Properties  or the
nature of its  activities  make such  qualification  necessary  and in which the
failure to be so qualified would have a Material Adverse Effect.

                 (B)  Corporate  Names.  During  the  preceding  five (5) years,
Borrower has not been known as or used any corporate,  fictitious or trade names
except as disclosed on Schedule  6.1(B)  attached hereto and made a part hereof.
Except as set forth on Schedule  6.1(B),  Borrower has not, during the preceding
five (5) years,  been the surviving  corporation of a merger or consolidation or
acquired all or substantially all of the assets of any Person.

                 (C) Corporate  Power and Authority.  Borrower has the right and
power and is duly authorized and empowered to enter into,  execute,  deliver and
perform  this  Agreement  and each of the other Loan  Documents to which it is a
party. The execution, delivery and performance of this Agreement and each of the
other Loan Documents have been duly authorized by all necessary corporate action
and do not and will not (i) require any consent or approval of the  shareholders
of Borrower;  (ii) contravene  Borrower's charter,  articles of incorporation or
by-laws,  (iii) violate, or cause Borrower to be in default under, any provision
of any  law,  rule,  regulation,  order,  writ,  judgment,  injunction,  decree,
determination or award in effect having  applicability to Borrower;  (iv) result
in a breach of or constitute a default  under any material  indenture or loan or
credit agreement or any other  agreement,  lease or instrument to which Borrower
is a party or by which it or its  Properties  may be bound or  affected;  or (v)
result in, or  require,  the  creation  or  imposition  of any Lien  (other than
Permitted  Liens)  upon or with  respect to any of the  Properties  now owned or
hereafter acquired by Borrower.



<PAGE>


                 (D) Legally Enforceable Agreement.  This Agreement is, and each
of the other Loan  Documents  when  delivered  under this  Agreement  will be, a
legal,  valid and  binding  obligation  of  Borrower  enforceable  against it in
accordance  with  their  respective  terms,  except  to  the  extent  that  such
enforcement  may be  limited  by  applicable  bankruptcy,  insolvency  and other
similar laws affecting  creditors'  rights  generally or by principles of equity
pertaining to the availability of equitable remedies.

                 (E) Use of  Proceeds.  Borrower's  uses of the  proceeds of any
advances  made by Lender to Borrower  pursuant to this  Agreement  are, and will
continue to be, legal and proper corporate uses, duly authorized by its Board of
Directors,  and such uses are consistent  with all applicable laws and statutes,
as in effect as of the date hereof.

                 (F) Margin Stock.  Borrower is not engaged  principally,  or as
one of its  important  activities,  in the  business of  purchasing  or carrying
"margin  stock"  (within  the  meaning  of  Regulation  G or U of the  Board  of
Governors  of the Federal  Reserve  System),  and no part of the proceeds of any
Loans to  Borrower  will be used to  purchase  or carry any  margin  stock or to
extend  credit to others for the purpose of  purchasing  or carrying  any margin
stock or be used for any  purpose  which  violates or is  inconsistent  with the
provisions of Regulation G, T, U or X of said Board of Governors.

                 (G)  Governmental  Consents.  Borrower  has,  and  is  in  good
standing with respect to, all governmental consents, approvals,  authorizations,
permits,  certificates,  inspections,  and  franchises  necessary to continue to
conduct its business as  heretofore or proposed to be conducted by it and to own
or lease and operate  its  Properties  as now owned or leased by it,  except for
those the absence of which would not  reasonably  be expected to have a Material
Adverse Effect.

                 (H) Solvent  Financial  Condition.  Borrower is now and,  after
giving effect to the initial Loans to be made  hereunder,  at all times will be,
Solvent.

                 (I) Litigation. Except as set forth on Schedule 6.1(I) attached
hereto and made a part  hereof,  there are no  actions,  suits,  proceedings  or
investigations pending, or to the knowledge of Borrower,  threatened, against or
affecting Borrower, or the business, operations,  Properties, prospects, profits
or condition of Borrower,  in any court or before any governmental  authority or
arbitration board or tribunal,  and no action, suit, proceeding or investigation
shown on  Schedule  6.1(I) is  reasonably  expected  to have a Material  Adverse
Effect.  Borrower is not in default with respect to any order, writ, injunction,
judgment,  decree or rule of any court,  governmental  authority or  arbitration
board or  tribunal  which is  reasonably  expected  to have a  Material  Adverse
Effect.

                 (J) Title to Properties.  Borrower has good,  indefeasible  and
marketable  title  to and fee  simple  ownership  of,  or valid  and  subsisting
leasehold  interests in, all of its real Property,  and good title to all of its
other  Property,  including,  without  limitation,  the Accounts,  Inventory and
Equipment, in each case, free and clear of all Liens except Permitted Liens.

                 (K) Financial  Statements.  The balance sheet of Borrower as of
September  30,  1996,  and  the  related   statements  of  income,   changes  in
stockholder's equity, and changes in financial position for the periods ended on
such dates,  have been prepared in  accordance  with GAAP (except for changes in
application  in  which  Borrower's   independent  certified  public  accountants
concur), and present fairly the financial position of Borrower at such dates and
the results of Borrower's operations for such periods. Since September 30, 1996,
there has been no material adverse change in the condition, financial or

<PAGE>


otherwise, of Borrower, except changes in the ordinary course of business, which
individually  or in the aggregate has been  materially  adverse.  Borrower has a
fiscal year ending December 31.

                 (L) Full Disclosure.  The financial  statements  referred to in
Section  6.1(K)  above,  do not, nor does this  Agreement  or any other  written
statement  of  Borrower to Lender  (including,  without  limitation,  Borrower's
filings,  if any,  with the  Securities  and Exchange  Commission),  contain any
untrue  statement of a material fact or omit a material  fact  necessary to make
the  statements  contained  therein or herein not  misleading.  There is no fact
which  Borrower  has failed to  disclose to Lender in writing  which  materially
affects adversely or, so far as Borrower can now foresee, will materially affect
adversely  the  Properties,   business,  profits,  or  condition  (financial  or
otherwise) of Borrower or the ability of Borrower to perform this Agreement.

                 (M) Pension  Plans.  Except as  disclosed  on  Schedule  6.1(M)
attached hereto and made a part hereof,  Borrower has no Plan.  Borrower has not
received any notice to the effect that it is not in full  compliance with any of
the requirements of ERISA and the regulations promulgated thereunder. No fact or
situation,  including,  but not limited to, any  Reportable  Event or Prohibited
Transaction exists in connection with any Plan which would create a liability of
Borrower.  Borrower does not have any withdrawal  liability in connection with a
Multiemployer Plan.

                 (N) Taxes. Borrower has filed all federal,  state and local tax
returns and other  reports it is  required by law to file and has paid,  or made
provision  for  the  payment  of,  all  taxes,   assessments,   fees  and  other
governmental charges that are due and payable, except such taxes, if any, as are
being actively  contested in good faith and as to which  adequate  reserves have
been provided.  The provision for taxes on the books of Borrower is adequate for
all years not closed by applicable statutes, and for its current fiscal year.

                 (O) Compliance With Laws.  Except with respect to Environmental
Laws,  which are covered in Section  6.1(P)  below,  Borrower has duly  complied
with, and its Properties,  business  operations and leaseholds are in compliance
with, in all material respects,  the provisions of all federal,  state and local
laws,  rules and  regulations  applicable  to Borrower,  its  Properties  or the
conduct  of  its  business,   including,   without  limitation,   OSHA  and  all
Environmental  Laws,  and there  have been no  citations,  notices  or orders of
noncompliance  issued to Borrower  under any such law, rule or regulation  other
than as listed on Schedule 6.1(P).  None of such notices of noncompliance  could
reasonably be expected to have a Material Adverse Effect.

                 (P) Environmental Laws.

                     (i) Borrower is in compliance with all Environmental  Laws,
with the  exceptions of instances  that will not in the aggregate  result in any
material liability on the part of Borrower.

                     (ii) Except as described in Schedule  6.1(P),  Borrower has
not received  notice of any failure to comply with, nor has any such notice been
issued that has not been  satisfied so as to bring any property of Borrower into
compliance with, all Environmental Laws. All licenses,  permits or registrations
(or any  extensions  thereof)  required  under  any  Environmental  Laws for the
business of Borrower as proposed to be conducted  have been  obtained,  with the
exception of instances that are not in the aggregate reasonably likely to have a

<PAGE>


Material  Adverse  Effect,  and  Borrower is in material  compliance  therewith.
Borrower  is in  compliance  with,  and is not in  breach  of or  default  under
applicable order of any Governmental  Authority and no event has occurred and is
continuing that, with the passage of time or the giving of notice or both, would
constitute noncompliance, breach or default thereunder.

                     (iii)  Except  as  described  in  Schedule  6.1(P),  (a) no
Hazardous  Substance  has been  Released  (and no written  notification  of such
Release  has been  filed)  or is  present  (whether  or not in a  reportable  or
threshold  planning  quantity)  at, on or under any property  owned or leased by
Borrower during the period of Borrower's  ownership or lease,  under  conditions
that required substantial  remedial action under applicable  Environmental Laws,
and (b) no property  now or  previously  owned or leased by Borrower  during the
period of Borrower's ownership or lease has, directly or indirectly, transported
or arranged  for the  transportation  of any  Hazardous  Substances  to any site
listed,  or proposed for listing,  on the National  Priorities List  promulgated
pursuant to CERCLA, on CERCLIS (as defined in CERCLA) or on any similar Federal,
state or foreign list of sites requiring  investigation or cleanup.  Borrower is
not aware of any  event,  condition  or  circumstances  involving  environmental
pollution or contamination,  or employee safety or health relating to the use or
handling of, or exposure to,  Hazardous  Substances,  that could  reasonably  be
expected to materially  adversely effect the operations,  Properties,  business,
prospects,  profits or  financial  condition  of  Borrower.  Borrower and Lender
acknowledge and agree that certain Inventory  consists of radioactive  isotopes,
which shall be handled in compliance with all Environmental Laws.

                 (Q) No Defaults.  No event has occurred and no condition exists
which would,  upon the  execution  and delivery of this  Agreement or Borrower's
performance hereunder,  constitute a Default or an Event of Default. Borrower is
not in  default,  and no  event  has  occurred  and no  condition  exists  which
constitutes,  or which with the  passage of time or the giving of notice or both
would  constitute,  a default in the payment of any  Indebtedness of Borrower to
any Person for Money Borrowed.

                 (R)  Brokers.  There are no claims for  brokerage  commissions,
finder's fees or investment  banking fees in  connection  with the  transactions
contemplated by this Agreement.

                 (S)  Investment  Company  Act.  Borrower is not an  "investment
company"  or a company  "controlled"  by an  "investment  company",  within  the
meaning of the Investment Company Act of 1940, as amended.

           6.2.  Reaffirmation.Each request for a Loan made by Borrower pursuant
to this  Agreement or any of the other Loan  Documents  shall  constitute (i) an
automatic  representation and warranty by Borrower to Lender that there does not
then exist any  Default or Event of Default and (ii) a  reaffirmation  as of the
date of said request of all of the  representations  and  warranties of Borrower
contained in this Agreement and the other Loan  Documents  except those relating
to a specific  date and except as to those  changes  otherwise  consented  to by
Lender or contemplated herein.

           6.3.  Survival of Representations and Warranties. Borrower covenants,
warrants and  represents to Lender that all  representations  and  warranties of

<PAGE>


Borrower contained in this Agreement or any of the other Loan Documents shall be
true at the time of  Borrower's  execution of this  Agreement and the other Loan
Documents in all material  respects,  and shall survive the execution,  delivery
and acceptance  thereof by Lender and the parties thereto and the closing of the
transactions described therein or related thereto.

SECTION 7.  COVENANTS AND CONTINUING AGREEMENTS

           7.1.  Affirmative  Covenants. During the term of this Agreement,  and
thereafter  for so long  as  there  are  any  Obligations  to  Lender,  Borrower
covenants that, unless otherwise consented to by Lender in writing, it shall:

                 (A) Taxes and Liens.  Pay and discharge all taxes,  assessments
and  governmental  charges upon it, its income and  Properties  as and when such
taxes,  assessments and charges are due and payable,  or within any period prior
to the  imposition of penalties,  except and to the extent only that such taxes,
assessments  and  charges  are being  actively  contested  in good  faith and by
appropriate  proceedings,  Borrower  maintains  adequate  reserves  on its books
therefor  and the  nonpayment  of such taxes,  assessments  and charges does not
result in a Lien upon any  Properties or Borrower  other than a Permitted  Lien.
Borrower shall also pay and discharge any lawful claims which, if unpaid,  would
become a Lien against any of Borrower's Properties except for Permitted Liens.

                 (B) Tax Returns. File all federal,  state and local tax returns
and other  reports  Borrower is required by law to file,  and maintain  adequate
reserves for the payment of all taxes,  assessments,  governmental  charges, and
levies  imposed  upon it,  its  income,  or its  profits,  or upon any  Property
belonging to it.

                 (C) Business and Existence.  Preserve and maintain its separate
corporate  existence and all rights,  privileges,  and  franchises in connection
therewith,  and maintain its  qualification  and good  standing in all states in
which such  qualification  is  necessary  and in which the failure to so qualify
would  materially  and  adversely  affect its business  operations  or financial
condition.

                 (D)  Maintain  Properties.  Maintain  its  Properties  in  good
condition and make all necessary renewals, repairs, replacements,  additions and
improvements  thereto  to the  extent  permitted  hereby and except as caused by
ordinary wear and tear, obsolescence, loss or damage.

                 (E)  Compliance  with Laws.  Comply with all laws,  ordinances,
governmental  rules and regulations,  in all material  respects,  to which it is
subject,  and  obtain  and  keep in  force  any and all  governmental  licenses,
permits,  franchises,  or other  governmental  authorizations  necessary  to the
ownership of its Properties or to the conduct of its business  which,  if not so
maintained, would be reasonably likely to have a Material Adverse Effect.

                 (F) ERISA  Compliance.  (i) At all times make prompt payment of
contributions  required to meet the minimum funding standards set forth in ERISA
with respect to each Plan,  (ii) promptly after the filing  thereof,  furnish to
Lender  copies of any annual  report  required to be filed  pursuant to ERISA in
connection  with  each Plan and any other  employee  benefit  plan of it and its
Affiliates,  (iii) notify Lender as soon as practicable of any Reportable  Event
and of any additional act or condition arising in connection with any Plan which
Borrower  believes might constitute  grounds for the termination  thereof by the
Pension Benefit  Guaranty  Corporation or for the appointment by the appropriate
United  States  district  court of a trustee to  administer  the Plan,  and (iv)
<PAGE>

furnish  to  Lender,  promptly  upon  Lender's  request  therefor,  such
additional  information  concerning any Plan or any other such employee  benefit
plan as may be reasonably requested.

                 (G)  Business  Records.  Keep  adequate  records  and  books of
account with respect to its business activities in which proper entries are made
in accordance with GAAP reflecting all its financial transactions.

                 (H) Visits and Inspections.  Permit  representatives of Lender,
from time to time,  as often as may be  reasonably  requested,  but only  during
normal business hours and without any unreasonable or material delay, hinderance
or  disruption of Borrower's  business,  to visit and inspect the  Properties of
Borrower,  inspect and make extracts from its books and records and discuss with
its officers, its employees and its independent accountants, Borrower's business
assets,  liabilities,  financial  condition,  business  prospects and results of
operations. Provided there shall be no ongoing and uncured Event of Default, (i)
Lender  shall  give  Borrower  at least one  Business  Day's  notice of any such
inspection  and (ii)  Borrower  may impose  reasonable  limitations  on Lender's
inspection of Borrower's business operations  involving Hazardous  Substances to
ensure  compliance  with  Environmental  Laws  and  the  safe  handling  of such
Hazardous Substances.

                 (I) Financial Statements. Cause to be prepared and furnished to
Lender the following:

                     (i) as soon as  possible,  but not later than  ninety  (90)
days  after  the  close  of each  fiscal  year  of  Borrower  audited  financial
statements  (accompanied  by an  unqualified  report from  Borrower's  certified
public  accountants)  of  Borrower  as of  the  end of  such  year  prepared  in
accordance with GAAP applied on a consistent basis, unless Borrower's  certified
public  accountants concur in any change therein and such change is disclosed to
Lender and is consistent with GAAP, certified by a firm of independent certified
public accountants of recognized standing selected by Borrower but acceptable to
Lender, which acceptance shall not be unreasonably withheld;

                     (ii) as soon as  possible,  but not later  than  forty-five
(45) days after the end of each  fiscal  quarter,  unaudited  interim  financial
statements  of  Borrower  as of the end of such  quarter  and of the  portion of
Borrower's fiscal year then elapsed, certified by the chief financial officer of
Borrower as prepared in  accordance  with GAAP  consistently  applied and fairly
presenting the financial position and results of operations of Borrower for such
quarter and period (subject to normal recurring year end adjustments);

                     (iii) promptly after the sending or filing thereof,  as the
case may be,  copies of any proxy  statements,  financial  statements or reports
which Borrower has made available to its shareholders and copies of any regular,
periodic and special  reports or  registration  statements  which Borrower files
with the Securities and Exchange Commission or any governmental  authority which
may be substituted therefor, or any national securities exchange;

                     (iv)  such  other  data  and  information   (financial  and
otherwise) as Lender, from time to time, may reasonably request, bearing upon or
related  to  the  Collateral,  Borrower's  financial  condition  or  results  of
operations, including, without limitation, federal income tax returns of

<PAGE>


Borrower, accounts payable ledgers, and bank statements.

           Concurrently with the delivery of the financial  statements described
in clauses  (i) and (ii) of this  Section  7.1(I),  Borrower  shall  cause to be
prepared and furnished to Lender a certificate of the chief financial officer of
Borrower in the form of Exhibit B attached hereto duly completed.

                 (J) Notices to Lender.  Notify Lender in writing:  (i) promptly
after  Borrower's  learning  thereof,  of the  commencement  of  any  litigation
affecting  Borrower  or any of its  Properties,  whether  or not  the  claim  is
considered by Borrower to be covered by insurance, and of the institution of any
administrative  proceeding which would reasonably be expected to have a Material
Adverse  Effect;  (ii) at least thirty (30) days prior  thereto,  of  Borrower's
opening  of any new office or place of  business  or  Borrower's  closing of any
existing office or place of business,  (iii) promptly after Borrower's  learning
thereof,  of any labor dispute to which Borrower may become a party, any strikes
or  walkouts  relating  to  any of its  plants  or  other  facilities,  and  the
expiration of any labor contract to which it is a party or by which it is bound;
(iv) promptly after  Borrower's  learning  thereof,  of any material  default by
Borrower under any note,  indenture,  loan  agreement,  mortgage,  lease,  deed,
guaranty or other similar  agreement  relating to any  Indebtedness  of Borrower
exceeding  $100,000;  (v) promptly after  Borrower's  learning  thereof,  of any
Default or Event of Default;  (vi) promptly after the occurrence thereof, of any
default by any obligor under any note or other evidence of Indebtedness  payable
to Borrower in excess of $100,000;  (vii) promptly after the rendition  thereof,
of any  judgment  rendered  against  Borrower in excess of  $100,000  and (viii)
promptly after the occurrence thereof, any resignation, retirement, termination,
appointment  or  substitution,  whether  permanent  or  temporary,  of the chief
executive  officer,  chief  operating  officer  or chief  financial  officer  of
Borrower.

                 (K) Environmental Laws. Borrower will:

                     (i)  comply  in all  material  respects  with  any  and all
licenses, approvals, registrations or permits required by Environmental Laws;

                     (ii)  conduct and  complete  all  investigations,  studies,
sampling and testing,  and all  remedial,  removal and other  actions,  required
under  Environmental  Laws and  promptly  comply  with  all  lawful  orders  and
directives of all Governmental Authorities respecting Environmental Laws, except
to the extent  that the same are being  contested  in good faith by  appropriate
proceedings, and

                     (iii) promptly notify Lender of any of the following:

                     (a)  any  Environmental   Claim  that  Borrower   receives,
including one to take or pay for any remedial,  removal,  response or cleanup or
other action with respect to any Hazardous  Substance  contained on any property
owned or leased by Borrower;

                     (b) any notice of any alleged  violation of or knowledge by
Borrower of Environmental Law; and

                     (c) any  commencement  or  threatened  commencement  of any
judicial or administrative  proceeding or investigation  alleging a violation or

<PAGE>


potential violation of any requirement of any Environmental Law by Borrower.

                     Borrower  agrees to  indemnify  Lender  and its  directors,
officers,  employees,  agents and  Affiliates  (each such person being called an
"Indemnitee")  against,  and hold each  Indemnitee  harmless  from,  any claims,
demands, penalties, fines, liabilities, settlements, damages, costs and expenses
(including  reasonable  attorneys'  fees,  charges  and  disbursements  actually
incurred) of whatever kind or nature  arising out of, or in any way relating to,
the violation of,  noncompliance  with or liability under any Environmental Laws
applicable to the  operations of Borrower or to the  Collateral,  or any orders,
requirements or demands of Governmental Authorities related thereto,  including,
without  limitation,   reasonable  attorneys'  and  consultants'  fees  actually
incurred,  investigation  and laboratory fees,  response costs,  court costs and
litigation expenses, except to the extent that any of the foregoing are found by
a final and nonappealable  decision of a court of competent jurisdiction to have
resulted  from the gross  negligence  or willful  misconduct  of the  Indemnitee
seeking indemnification therefor. The obligations of Borrower under this Section
shall survive the termination of this Agreement indefinitely.

                 (L)| Further Assurances.  At Lender's request, promptly execute
or cause to be executed and deliver to Lender any and all documents, instruments
and agreements deemed reasonably  necessary by Lender to give effect to or carry
out the terms or intent of this  Agreement  or any of the other Loan  Documents.
Without  limiting the generality of the foregoing,  if any of the Accounts,  the
face value of which  exceeds  $5,000,  arises out of a contract  with the United
States of America,  or any department,  agency,  subdivision or  instrumentality
thereof,  Borrower  shall  promptly  notify Lender  thereof in writing and shall
execute any  instruments  and take any other  action  required or  requested  by
Lender to comply with the provisions of the Federal Assignment of Claims Act.

                 (M) Insurance.  Borrower will maintain,  with financially sound
and reputable  insurers,  insurance  with respect to its Properties and business
and  against  such  casualties,  liabilities  and  contingencies  of  such  type
(including,  without limitation,  public liability, product liability,  larceny,
embezzlement  or other  criminal  misappropriation)  and in such  amounts  as is
customary for similarly  situated Persons engaged in businesses similar to those
of Borrower.

                 (N)  Primary  Banking  Relationships.  To  the  maximum  extent
permitted  by  applicable  law,  Borrower  shall  maintain  its primary  banking
relationships with Lender.

                 (O) Title Policy Endorsement. Within thirty (30) days after the
date hereof,  Borrower agrees to deliver or cause to be delivered to Lender,  at
Borrower's  expense,  a title insurance  endorsement to Lender's  existing title
insurance policy in form and substance reasonably satisfactory to Lender.

           7.2.  Negative  Covenants.  During  the term of this  Agreement,  and
thereafter  for so long  as  there  are  any  Obligations  to  Lender,  Borrower
covenants that,  unless Lender has first consented  thereto in writing,  it will
not:



<PAGE>


                 (A) Mergers; Consolidations; Acquisitions. Merge or consolidate
with any Person or acquire all or any substantial  part of the Properties of any
Person.

                 (B) Loans.  Make any loans or other  advances  of money  (other
than for salary, travel advances, advances against commissions and other similar
advances in the ordinary course of business) to any Person,  including,  without
limitation,  any of Borrower's  Affiliates,  officers or employees,  except that
Borrower may have loans or other advances of money  outstanding to its employees
so long as the aggregate  outstanding  principal balance thereof does not exceed
$150,000 at any one time.

                 (C)  Affiliate  Transactions.  Enter into, or be a party to any
transaction with any Affiliate or stockholder,  except in the ordinary course of
and pursuant to the reasonable requirements of Borrower's business and upon fair
and  reasonable  terms  which are  fully  disclosed  to  Lender  and are no less
favorable  to  Borrower  than it  would  obtain  in a  comparable  arm's  length
transaction with a Person not an Affiliate or stockholder of Borrower.

                 (D) Guaranties. Guarantee, assume, endorse or otherwise, in any
way, become directly or contingently  liable with respect to the Indebtedness of
any Person except by  endorsement of instruments or items of payment for deposit
or collection in the ordinary course of business.

                 (E)  Limitation  on  Liens.  Create or suffer to exist any Lien
upon any of its  Property,  income or profits,  whether  now owned or  hereafter
acquired,  except: (i) Liens at any time granted in favor of Lender;  (ii) Liens
for taxes  (excluding  any Lien  imposed  pursuant to any of the  provisions  of
ERISA) not yet due or being contested as permitted by Section 7.1(A) hereof, but
only if in  Lender's  reasonable  judgment  such Lien does not affect  adversely
Lender's rights or the priority of Lender's Lien in the Collateral,  (iii) Liens
securing   the   claims  or  demands  of   materialmen,   mechanics,   carriers,
warehousemen, landlords and other like Persons for labor, materials, supplies or
rentals incurred in the ordinary course of Borrower's business,  but only if the
payment thereof is not at the time required (or if payment is required,  only if
and for so long as the  execution  or  other  enforcement  of such  Liens is and
continues to be effectively stayed and bonded in a manner satisfactory to Lender
for the full  amount  thereof,  the  validity  and amount of the claims  secured
thereby are being  actively  contested in good faith and by  appropriate  lawful
proceedings and such Liens do not, in the aggregate, materially detract from the
value of the  Property of Borrower or  materially  impair the use thereof in the
operation of Borrower's business) and only if such Liens are junior to the Liens
in favor of Lender;  (iv) liens incurred or deposits made in the ordinary course
of business in connection with workmen's  compensation,  unemployment insurance,
social security and other like laws, (v) attachment,  judgment and other similar
non-tax Liens arising in connection with court proceedings,  but only if and for
so long as the execution or other  enforcement  of such Lien is and continues to
be effectively  stayed and bonded on appeal in a manner  satisfactory  to Lender
for the full  amount  thereof,  the  validity  and amount of the claims  secured
thereby are being  actively  contested in good faith and by  appropriate  lawful
proceedings and such Liens do not, in the aggregate, materially detract from the
value of the  Property of Borrower or  materially  impair the use thereof in the
operation or Borrower's  business,  (vi) Purchase Money Liens on fixed assets of
Borrower other than real estate and not otherwise inconsistent with the terms of
this Agreement, (vii) reservations,  exceptions,  easements,  rights of way, and
other similar encumbrances  affecting real Property,  provided that, in Lender's
sole judgment, they do not in the aggregate materially detract from the value of
said Properties or materially  interfere with their use in the ordinary  conduct
of Borrower's business and, if said real Property constitutes Collateral, Lender
has consented thereto, and (viii) such other Liens as may be expressly disclosed
on Schedule 7.2(E) attached hereto.

<PAGE>




                 (F) Subsidiaries. Hereafter create or acquire any subsidiary.

                 (G)  Business  Locations.   Transfer  its  principal  place  of
business or chief  executive  office or  maintain  records  with  respect to its
Accounts at any locations  other than those at which the same are presently kept
or  maintained  except upon at least  thirty (30) days prior  written  notice to
Lender and after the delivery to Lender of financing statements,  if required by
Lender,  in form  reasonably  satisfactory  to Lender to perfect or continue the
perfection of Lender's Lien and security interest hereunder.

                 (H) Change of Business. Enter into any new business or make any
material change in any of Borrower's business objectives and purposes.

                 (I) Disposition of Assets.  Sell, lease or otherwise dispose of
any of its  Properties  except  for (i)  sales  in the  ordinary  course  of its
business and (ii) assets no longer useful in  Borrower's  business or operations
and having a book value of less than $100,000 in the  aggregate  during the term
of this Agreement.

                 (J)  Restricted   Investment.   Make  or  have  any  Restricted
Investment.

                 (K) Limitation on Indebtedness. Create, incur, assume or suffer
to exist any  Indebtedness,  except:  (i)  Indebtedness  evidenced by or arising
under this  Agreement,  the Letter of Credit  Agreement or any of the other Loan
Documents;  (ii)  unsecured  current  liabilities  (other  than  those for Money
Borrowed)  incurred in the  ordinary  course of business  for current  purposes,
including, without limitation, trade payables incurred in the ordinary course of
business,  and which are not  represented by a promissory note or other evidence
of  indebtedness  and are not  more  than  thirty  (30)  days  past  due;  (iii)
Indebtedness   described  on  Schedule   7.2(K)  hereto,   (iv)  Purchase  Money
Indebtedness not otherwise  inconsistent  with the terms of this Agreement,  and
(v) renewals or  extensions  of any of the  Indebtedness  described in items (i)
through  (iv) above (but so long as any  indebtedness  described  in items (ii),
(iii) or (iv) above is not increased after the date hereof).

                 (L) Minimum Tangible Net Worth.  Borrower's  Tangible Net Worth
shall not be less than  $14,000,000  at any time during the period from the date
hereof through the end of its fiscal year ending December 31, 1996, and Borrower
shall  maintain a Tangible Net Worth at all times during each fiscal year ending
after  December 31, 1996 which is not less than the sum of the minimum  Tangible
Net Worth of Borrower  required  hereunder for the immediately  preceding fiscal
year plus  seventy-five  percent (75%) of Borrower's  Net Income after taxes for
such prior year (rounded up to the nearest one hundred thousand dollars but such
sum shall not be reduced if Borrower suffers a net loss in any one year).

                 (M) Leverage Ratio. Borrower's Leverage Ratio shall not be more
than 1.5 to 1.0 as of the end of any fiscal  quarter or fiscal year ending on or
after the date hereof.

                 (N) Debt Service Coverage Ratio. As of June 30, 1997, and as of
the end of each fiscal  quarter  thereafter,  Borrower's  Debt Service  Coverage
Ratio for Borrower's most recently completed four (4) quarters shall not be less
than 1.5 to 1.0.

                 (O)  Capital  Expenditures.  Excluding  any  portion of Capital
Expenditures  funded by new  equity  capital  invested  in  Borrower  other than
retained  earnings,   Borrower's  Capital  Expenditures  shall  not  exceed  the
following amounts during the period indicated:


<PAGE>



    Fiscal Year
      Ending                                              Capital Expenditures
 December 31, 1996                                                $10,000,000
 December 31, 1997                                                $16,000,000
 December 31, 1998                                                $25,000,000
 December 31, 1999                                                $30,000,000
 December 31, 2000                                                $30,000,000

                 (P) Cyclotron  Purchases.  Borrower shall not order or purchase
additional  Cyclotrons  except in accordance  with the following  criteria:  (i)
after the date hereof,  and so long as no Default or Event of Default  exists or
will be created by the order or purchase of  Cyclotrons  as provided  hereunder,
Borrower may order and purchase up to four (4) new Cyclotrons; (ii) in addition,
if  Borrower's  revenues  for any  fiscal  quarter  equal or exceed  $4,000,000,
Borrower may order and purchase an additional four (4) new Cyclotrons;  (iii) in
addition,  for each $500,000 by which Borrower's  revenues in any fiscal quarter
exceed  $4,000,000,  Borrower  may order and  purchase up to one (1)  additional
Cyclotron;  (iv) the limitations set forth in subsections (i), (ii) and (iii) of
this  Section  7.2(P)  shall not apply to any order or  purchase  of a Cyclotron
which is  funded by new  equity  capital  invested  in  Borrower  after the date
hereof;  and (v) any order or purchase of a  Cyclotron  pursuant to  subsections
(i), (ii) or (iii) of this Section 7.2(P) shall constitute a Capital Expenditure
for  purposes  of Section  7.2(O),  except such  purchases  funded by new equity
capital  invested  in  Borrower  after  the date  hereof;  and  (vi)  Borrower's
attainment of the requisite revenue thresholds set forth in subsections (ii) and
(iii) hereof in any fiscal  quarter shall permit  Borrower to order and purchase
the number of Cyclotrons  referred to in such  subsections  only once, such that
attaining the same such revenue  thresholds in any later fiscal quarter will not
permit Borrower to again order or purchase that number of Cyclotrons referred to
in such subsections.

                 (Q) Dividends,  Distributions,  Etc. Borrower shall not declare
or pay any dividend on its capital  stock (other than stock  dividends)  or make
any payment to purchase,  redeem,  retire or acquire any of its capital stock or
any  option,  warrant  or other  right to  acquire  such  capital  stock if such
declaration  or payment  would cause a Default or Event of Default  under any of
the financial covenants set forth in this Section 7.2.

                 (R) Funded Debt Ratio.  As of the date hereof  through June 30,
1997,  Borrower shall not permit (a) Borrower's  Indebtedness for Money Borrowed
for  Borrower's  most  recently  completed  four  (4)  quarters  divided  by (b)
Borrower's EBITDA for Borrower's most recently  completed four (4) quarters,  to
exceed 3.0 to 1.0.

                 (S) Negative  Negative Pledge.  Borrower shall not, directly or
indirectly,  enter  into  any  agreement  (other  than the  Loan  Documents  and
Permitted  Liens)  with any Person that  prohibits  or  restricts  or limits the
ability of Borrower to create,  incur,  pledge, or suffer to exist any Lien upon
any assets of Borrower.



<PAGE>


 SECTION 8.  CONDITIONS PRECEDENT

           Notwithstanding  any other  provision of this Agreement or any of the
other Loan Documents,  and without  affecting in any manner the rights of Lender
under the other  Sections of this  Agreement,  it is understood  and agreed that
Lender will not be obligated to make any Loan under Section 2 of this  Agreement
or issue any Letter of Credit under Section 3 of this Agreement unless and until
each of the following conditions has been and continues to be satisfied,  all in
form and substance satisfactory to Lender and its counsel:

           8.1.  Documentation.   Lender  shall  have  received  the  following
documents,  each to be in form and substance  reasonably  satisfactory to Lender
and its counsel:

                 (A) The Loan Documents  duly executed,  completed and delivered
by  Borrower,  including  the  Second  Modification  of  Deeds to  Secure  Debt,
Assignment  of Rents and  Security  Agreement  in the form of Exhibit E attached
hereto;

                 (B)  Certified   copies  of  Borrower's   liability   insurance
policies, together with endorsements naming Lender as a co-insured;

                 (C) Copies of all filing receipts or acknowledgments  issued by
any  governmental  authority to evidence any filing or recordation  necessary to
perfect the Liens of Lender in the Collateral and evidence in a form  reasonably
acceptable to Lender that such Liens  constitute  valid and  perfected  security
interests  and  Liens,  having the Lien  priority  specified  in Section  5.2(B)
hereof;

                 (D) A copy of the Certificate of Incorporation of Borrower, and
all amendments thereto,  certified as of a recent date by the Secretary of State
of Delaware;

                 (E) Current good  standing  certificates  (or  certificates  of
existence)  for  Borrower,  issued by the Secretary of State of each of Delaware
and Georgia;

                 (F) A closing certificate signed by the Chief Financial Officer
and the  Secretary or any Assistant  Secretary of Borrower  dated as of the date
hereof, and in the form of Exhibit F attached hereto, duly completed;

                 (G) An opinion of  Borrower's  counsel in the form of Exhibit G
attached  hereto  and  copies  of the  results  of a  recent  examination  under
Borrower's name of the Uniform Commercial Code financing statement,  federal and
state tax lien and judgment lien records of Gwinnett County, Georgia;

                 (H) Lien Subordination  Agreements  executed by all contractors
listed on Exhibit B to Borrower's Affidavit dated as of the date hereof executed
by Bruce W. Smith; and

                 (I) Such other documents,  instruments and agreements as Lender
shall reasonably request in connection with the foregoing matters.

           8.2.  Other Conditions. The following  conditions have been and shall
continue to be  satisfied,  in the sole judgment of Lender as of the date of and
after giving effect to such Loan or the issuance of such Letter of Credit:

                 (A) No Default or Event of Default shall exist;



<PAGE>


                 (B) Each of the  conditions  precedent  set  forth in the other
Loan Documents shall have been satisfied;

                 (C) Since September 30, 1996, there shall not have occurred any
material  adverse  change in the  business,  financial  condition  or results of
operations  of Borrower,  or the  existence or value of any  Collateral,  or any
event,  condition or state of facts which would reasonably be expected to have a
Material Adverse Effect;

                 (D)  No  action,  proceeding,   investigation,   regulation  or
legislation shall have been instituted, threatened or proposed before any court,
governmental agency or legislative body to enjoin,  restrain or prohibit,  or to
obtain  damages  in  respect  of, or which is  related  to or arises out of this
Agreement or the consummation of the transactions  contemplated  hereby or which
in Lender's reasonable  discretion,  would make it inadvisable to consummate the
transactions  contemplated by this Agreement or any of the other Loan Documents;
and

                 (E)  With  respect  to any  request  for a  Letter  of  Credit,
Borrower shall have executed and delivered to Lender a completed application for
issuance of a letter of credit using  Lender's then current form of  application
for issuance of letters of credit.

SECTION 9.  EVENTS OF DEFAULT: RIGHTS AND REMEDIES ON DEFAULT

           9.1.  Events of  Default.  The  occurrence  of any one or more of the
following events shall constitute an "Event of Default":

                 (A) Payment of Obligations.  Any payment of any principal under
the Note shall not be received by Lender on the day such  payment is due, or any
payment of any interest  under the Note or any  reimbursement  obligations  with
respect to any  Letter of Credit,  or any fees  payable  hereunder  or under the
other Loan  Documents  shall not be received by Lender  within five (5) Business
Days from the day such payment is due.

                 (B) Misrepresentations.  Any warranty, representation, or other
statement  made or  furnished  to Lender by or on behalf of  Borrower  or in any
instrument,  certificate or financial  statement furnished in compliance with or
in reference to this Agreement or any of the other Loan Documents proves to have
been false or misleading in any material respect when made or furnished.

                 (C)  Breach of  Covenants.  Borrower  shall  fail or neglect to
perform,  keep or observe (i) any covenant contained in Sections 5.2, 5.3 or 7.2
of this Agreement or (ii) any other covenant  contained in this Agreement (other
than a covenant a default in the  performance  or  observance  of which is dealt
with  specifically  elsewhere  in this Section 9.1) and the breach of such other
covenant is not cured to Lender's satisfaction within thirty (30) days after the
sooner to occur of  Borrower's  receipt of notice of such  breach from Lender or
the date on which  such  failure  or  neglect  becomes  known to any  officer of
Borrower.

                 (D) Default  Under Other Loan  Documents.  Any event of default
shall occur under, or Borrower shall default in the performance or observance of
any term,  covenant,  condition or agreement contained in, any of the other Loan
Documents and such default shall continue beyond any applicable period of grace.

                 (E) Other  Defaults.  There shall occur any default or event of
default on the part of Borrower (including specifically, but without limitation,
due to  non-payment)  under  any  agreement,  document  or  instrument  to which

<PAGE>


Borrower  is a party or by  which  Borrower  or any of its  Property  is  bound,
creating  or  relating  to any  Indebtedness  if the payment or maturity of such
Indebtedness  is  accelerated  in consequence of such event of default or demand
for  payment  of such  Indebtedness  is made and the  amount  at  issue  exceeds
$100,000.

                 (F)   Adverse   Changes.   There   shall  occur  any  event  or
circumstance  which  could be  reasonably  expected  to have a Material  Adverse
Effect.

                 (G) Insolvency.

                     (i) There  shall be entered a decree or order for relief in
respect of Borrower under Title 11 of the United States Code, as now constituted
or hereafter amended, or any other applicable federal or state bankruptcy law or
other  similar law, or  appointing a receiver,  liquidator,  assignee,  trustee,
custodian,  sequestrator,  or similar official of Borrower or of any substantial
part of any of its properties,  or ordering the winding-up or liquidation of the
affairs of Borrower or an involuntary  petition shall be filed against  Borrower
and a  temporary  stay  entered,  and (i) such  petition  and stay  shall not be
diligently  contested,  or (ii)  any  such  petition  and  stay  shall  continue
undismissed for a period of sixty (60) consecutive days.

                     (ii)  Borrower  shall file a petition,  answer,  or consent
seeking  relief under Title 11 of the United States Code, as now  constituted or
hereafter  amended,  or any other applicable  federal or state bankruptcy law or
other similar law, or Borrower  shall consent to the  institution of proceedings
thereunder or to the filing of any such petition or to the appointment or taking
of  possession  of  a  receiver,   liquidator,   assignee,  trustee,  custodian,
sequestrator,  or other similar  official of Borrower or of any substantial part
of any of its  properties,  or Borrower shall fail generally to pay its debts as
they become due, or Borrower  shall take any action in  furtherance  of any such
action.

                 (H)  Business  Disruption;  Condemnation.  There  shall occur a
cessation of a  substantial  part of the business of Borrower for a period which
significantly  affects  Borrower's  capacity  to  continue  its  business,  on a
profitable  basis,  or  Borrower  shall  suffer  the loss or  revocation  of any
governmental  license or permit now held or hereafter acquired by Borrower which
is necessary to the continued or lawful  operation of its business;  or Borrower
shall be enjoined,  restrained or in any way prevented by court, governmental or
administrative  order from  conducting  all or any material part of its business
affairs;  or any material lease or agreement  pursuant to which Borrower leases,
uses or occupies any Property  shall be  cancelled  or  terminated  prior to the
expiration of its stated term, or any material part of the  Collateral  shall be
taken  through  condemnation  or the value of such  Property  shall be  impaired
through condemnation unless said proceeds are remitted to Lender.

                 (I) ERISA. A Reportable Event shall occur which Lender,  in its
sole  discretion,  shall  determine  in good faith  constitutes  grounds for the
termination by the Pension Benefit  Guaranty  Corporation of any Plan or for the
appointment by the appropriate United States district court of a trustee for any
Plan,  or if any Plan shall be terminated or any such trustee shall be requested
or appointed,  or if Borrower is in "default" (as defined in Section  4219(c)(5)
of ERISA) with  respect to  payments  to a  Multiemployer  Plan  resulting  from
Borrower's complete or partial withdrawal from such Plan.



<PAGE>


                 (J)  Litigation.  Borrower  shall  challenge  or contest in any
action,  suit or proceeding the validity or  enforceability of this Agreement or
any of the other Loan Documents,  the legality or  enforceability  of any of the
Obligations or the perfection or priority of any Lien granted to Lender.

                 (K) Change in Control.  The acquisition  after the date of this
Agreement by any Person or, by any two or more  Persons,  acting in concert,  of
beneficial  ownership (within the meaning,  of Rule 13-d-3 of the Securities and
Exchange  Commission  under the  Securities  Exchange Act of 1934) of either (a)
twenty percent (20%) or more of the outstanding  voting stock of Borrower or (b)
the power to direct or cause the direction of the management and policies of the
Borrower  whether  through the  ownership of voting  securities,  by contract or
otherwise.

                 (L) Change in Management.  Any material change in the executive
management  of Borrower  unless  such person is replaced by a person  possessing
executive, financial, managerial,  scientific and technical knowledge reasonably
comparable to such person.

           9.2. Acceleration of the  Obligations.Without in any way limiting the
right of Lender to demand payment of any portion of the  Obligations  payable on
demand in accordance  with this  Agreement,  upon and after the occurrence of an
Event of Default as above provided, all or any portion of the Obligations due or
to become due from Borrower to Lender,  whether under this Agreement,  or any of
the other  Loan  Documents  or  otherwise,  shall,  at the  option of Lender and
without notice or demand by Lender,  become at once due and payable and Borrower
shall forthwith pay to Lender,  in addition to any and all sums and charges due,
the entire principal of and interest accrued on the Obligations.

           9.3.  Remedies. Upon the occurrence of an Event of Default and during
the continuation  thereof,  Lender shall have and may exercise from time to time
the following rights and remedies:

                 (A) By written notice to Borrower, terminate Lender's remaining
commitment  hereunder to make any further  Loans to Borrower  whereupon any such
commitment shall terminate immediately.

                 (B) All of the rights and remedies of a secured party under the
Code or under other  applicable law, and all other legal and equitable rights to
which  Lender  may be  entitled,  all of  which  rights  and  remedies  shall be
cumulative,  and none of which shall be  exclusive,  and shall be in addition to
any other  rights or remedies  contained  in this  Agreement or any of the other
Loan Documents.

                 (C) The right to take immediate  possession of the  Collateral,
and (i) to require Borrower to assemble the Collateral,  at Borrower's  expense,
and make it  available  to  Lender  at a place  designated  by  Lender  which is
reasonably  convenient to both parties, and (ii) to enter any of the premises of
Borrower or wherever  any of the  Collateral  shall be located,  and to keep and
store the same on said premises until sold (and if said premises be the Property
of Borrower, Borrower agrees not to charge Lender for storage thereof).

                 (D)  Subject  to all  Federal  and  State  regulatory  laws and
Environmental Laws pertaining to the Collateral,  the right to sell or otherwise
dispose of all or any  Inventory  in its then  condition,  or after any  further
manufacturing or processing  thereof,  at public or private sale or sales,  with
such notice as may be required by law, in lots or in bulk, for cash or in

<PAGE>


credit,  all as  Lender in its sole  discretion,  may deem  advisable.  Borrower
agrees  that ten (10) days'  prior  written  notice to Borrower of any public or
private sale or other  disposition of such Collateral shall be reasonable notice
thereof and such sale shall be at such  location as Lender may designate in said
notice.  Lender  shall  have  the  right to  conduct  such  sales on  Borrower's
premises,  without charge therefor, and such sales may be adjourned from time to
time in accordance with applicable law. Lender shall have the right,  subject to
all Federal and State regulatory laws and  Environmental  Laws pertaining to the
Collateral,  to sell, lease or otherwise dispose of such Collateral, or any part
thereof,  for cash, credit or any combination  thereof,  and Lender may purchase
all or any part of such collateral at public or, if permitted by applicable law,
private sale and, in lieu of actual payment of such purchase price,  may set off
the amount of such price against the Obligations.

                 (E) Lender is hereby  granted a license or other  right to use,
without charge,  Borrower's labels,  patents,  copyrights,  rights of use of any
name,  trade  secrets,  trade names,  trademarks and  advertising  matter or any
Property of a similar  nature as it pertains to the  Collateral,  in advertising
for sale and selling any Collateral, subject to all Federal and State regulatory
laws and Environmental laws pertaining to the Collateral,  and Borrower's rights
under all licenses and all franchise agreements shall inure to Lender's benefit.

                 (F) The proceeds  realized from the sale of any  Collateral may
be applied,  after allowing two (2) Business Days for  collection,  first to the
reasonable costs,  expenses and reasonable attorneys' fees and expenses actually
incurred by Lender for collection and for acquisition,  completion,  protection,
removal, storage, sale and delivery of the Collateral, secondly, to interest due
upon any of the Obligations,  and thirdly,  to the principal of the Obligations.
If any deficiency shall arise, Borrower and the Guarantor shall remain liable to
Lender therefor; and any surplus shall be paid to Borrower.

           9.4.  Remedies  Cumulative:  No Waiver.  All  covenants,  conditions,
provisions,  warranties,  guaranties,  indemnities,  and other  undertakings  of
Borrower  contained in this  Agreement and the other Loan  Documents,  or in any
document referred to herein or contained in any agreement  supplementary  hereto
or in any schedule given to Lender or contained in any other  agreement  between
Lender and Borrower, heretofore,  concurrently, or hereafter entered into, shall
be deemed  cumulative  to and not in derogation  or  substitution  of any of the
terms, covenants,  conditions,  or agreements of Borrower herein contained.  The
failure or delay of Lender to exercise or enforce any rights,  Liens, powers, or
remedies  hereunder or under any of the aforesaid  agreements or other documents
or security or Collateral  shall not operate as a waiver of such Liens,  rights,
powers and remedies,  but all such Liens,  rights,  powers,  and remedies  shall
continue  in full  force and  effect  until all Loans and all other  Obligations
owing or to  become  owing  from  Borrower  to  Lender  shall  have  been  fully
satisfied,  and all Liens, rights,  powers, and remedies herein provided for are
cumulative and none are exclusive.

SECTION 10.  MISCELLANEOUS

           10.1.  Power of Attorney.  Borrower  hereby  irrevocably  designates,
makes, constitutes and appoints Lender (and all Persons designated by Lender) as
Borrower's true and lawful attorney (and  agent-in-fact) and Lender, or Lender's
agent,  may,  without  notice to Borrower and in either  Borrower's  or Lender's
name, but at the cost and expense of Borrower:



<PAGE>


                 (A) At such time or times hereafter as Lender or said agent, in
its sole  discretion,  may  determine,  endorse  Borrower's  name on any checks,
notes,  acceptances,  drafts,  money orders or any other  evidence of payment or
proceeds of the  Collateral  which come into the  possession  of Lender or under
Lender's control, and

                 (B) At such time or times  upon or after the  occurrence  of an
Event of Default as Lender or its agent in its sole  discretion  may  determine:
(i) demand payment of the Accounts from the Account Debtors,  enforce payment of
the Accounts by legal  proceedings or otherwise,  and generally  exercise all of
Borrower's  rights and remedies with respect to the  collection of the Accounts,
(ii)  settle,  adjust,  compromise,  discharge or release any of the Accounts or
other Collateral or any legal proceedings brought to collect any of the Accounts
or  other  Collateral;  (iii)  sell or  assign  any of the  Accounts  and  other
Collateral upon such terms, for such amounts and at such time or times as Lender
deems  advisable,  (iv) take control,  in any manner,  of any item of payment or
proceeds relating to any Collateral,  (v) prepare, file and sign Borrower's name
to a proof of claim in bankruptcy or similar document against any Account Debtor
or to any notice of lien, assignment or satisfaction of lien or similar document
in connection with any of the Collateral,  (vi) receive, open and dispose of all
mail  addressed  to  Borrower  and to notify  postal  authorities  to change the
address for  delivery  thereof to such  address as Lender may  designate,  (vii)
endorse  the name of  Borrower  upon any of the  items of  payment  or  proceeds
relating  to any  Collateral  and  deposit  the same to the account of Lender on
account of the Obligations, (viii) endorse the name of Borrower upon any chattel
paper, document,  instrument,  invoice,  freight bill, bill of lading or similar
document  or  agreement  relating  to the  Accounts,  Inventory  and  any  other
Collateral,  (ix) use  Borrower's  stationery  and sign the name of  Borrower to
verifications  of the Accounts and notices thereof to Account  Debtors;  (x) use
the information  recorded on or contained in any data  processing  equipment and
computer hardware and software relating to the Accounts, Inventory and any other
Collateral and to which  Borrower has access,  (xi) make and adjust claims under
policies  of  insurance,  and (xii) do all other acts and things  necessary,  in
Lender's determination, to fulfill Borrower's obligations under this Agreement.

           10.2. Indemnity.  Borrower hereby agrees to indemnify Lender and hold
Lender harmless from and against any liability,  loss,  damage,  suit, action or
proceeding  ever  suffered  or  incurred  by Lender as the result of  Borrower's
failure to observe,  perform or discharge  Borrower's duties hereunder.  Without
limiting the  generality of the foregoing,  this  indemnity  shall extend to any
claims  asserted  against Lender by any Person under any  Environmental  Laws or
similar laws by reason of  Borrower's  or any other  Person's  failure to comply
with laws  applicable  to solid or  hazardous  waste  materials  or other  toxic
substances.

           10.3. Modification of Agreement: Sale of Interest. This Agreement may
not be modified, altered or amended, except by an agreement in writing signed by
Borrower and Lender.  Borrower may not sell,  assign or transfer any interest in
this  Agreement  or any of the other Loan  Documents,  or any  portion  thereof,
including,  without limitation,  Borrower's rights, title, interests,  remedies,
powers, and duties hereunder or thereunder. Borrower hereby consents to Lender's
participation,  sale, assignment,  transfer or other disposition, at any time or
times  hereafter,  of this Agreement and any of the other Loan Documents,  or of
any portion hereof or thereof, including,  without limitation,  Lender's rights,
title,  interests,   remedies,  powers,  and  duties  hereunder  or  thereunder;
provided,  however,  that so long as no  Default  or  Event of  Default  is then
existing, Lender shall hold a majority of the outstanding Loans hereunder.



<PAGE>


           10.4. Increased Costs.

                 (A) If any applicable  law, rule, or regulation,  or any change
therein,  or any  interpretation  or change in  interpretation or administration
thereof by any  governmental  authority,  central  bank,  or  comparable  agency
charged with the  interpretation  or  administration  thereof or  compliance  by
Lender  with any  request  or  directive  (whether  or not  having  the any such
authority, central bank, or comparable agency:

                     (i) Shall subject  Lender to any tax, duty, or other charge
with respect to its obligation to make LIBOR Advances, or its LIBOR Advances, or
shall change the basis of taxation of payments to Lender of the  principal of or
interest on its LIBOR Advances or in respect of any other amounts due under this
Agreement  in  respect of its LIBOR  Advances  or its  obligation  to make LIBOR
Advances  (except  for  changes in the rate of tax on the  overall net income of
Lender imposed by the jurisdiction in which Lender's principal  executive office
is located); or

                     (ii) Shall impose,  modify,  or deem applicable any reserve
(including,  without  limitation,  any imposed by the Board of  Governors of the
Federal  Reserve  System,  but excluding any included in an applicable  Adjusted
LIBOR rate), special deposit, capital adequacy, assessment, or other requirement
or  condition  against  assets  of,  deposits  with or for the  account  of,  or
commitments  or credit  extended  by  Lender,  or shall  impose on Lender or the
eurodollar   interbank  borrowing  market  any  other  condition  affecting  its
obligation to make such LIBOR Advances or its LIBOR Advances;  and the result of
any of the foregoing is to increase the cost to Lender of making or  maintaining
any such  LIBOR  Advances,  or to  reduce  the  amount  of any sum  received  or
receivable  by Lender  under  this  Agreement  or under  its Note  with  respect
thereto,  and such  increase is not given effect in the  determination  of LIBOR
then, on the earlier of demand by Lender or the Maturity Date,  Borrower  agrees
to pay to Lender such additional amount or amounts as will compensate Lender for
such increased costs. Lender will promptly notify Borrower of any event of which
it has knowledge,  occurring after the date hereof, which will entitle Lender to
compensation  pursuant  to this  Section  10.4 and will  designate  a  different
lending office if such designation will avoid the need for, or reduce the amount
of, such compensation and will not, in the sole judgment of Lender, be otherwise
disadvantageous to Lender.

                 (B) A certificate of Lender  claiming  compensation  under this
Section 10.4 and setting forth the additional amount or amounts to be paid to it
hereunder  and  calculations  therefor  shall be  conclusive  in the  absence of
manifest  error.  If the Lender  demands  compensation  under this Section 10.4,
Borrower may at any time,  upon at least five (5) Business Days' prior notice to
Lender,  prepay in full the then outstanding  affected LIBOR Advances of Lender,
together with accrued interest thereon to the date of prepayment, along with any
reimbursement required under Section 2.4(H) hereof.  Concurrently with prepaying
such LIBOR Advances,  Borrower shall borrow a Treasury Rate Advance,  or a LIBOR
Advance not so affected,  from  Lender,  and Lender shall make the advance in an
amount  such that the  outstanding  principal  amount of the Note held by Lender
shall equal the outstanding  principal amount of such Note immediately  prior to
such prepayment.

           10.5.  Reimbursement  of Expenses.  If, at any time or times prior or
subsequent to the date hereof,  regardless of whether or not an Event of Default
then exists or any of the  transactions  contemplated  hereunder are  concluded,
Lender  employs  counsel  for advice or other  representation,  or incurs  legal

<PAGE>


expenses or other costs or  out-of-pocket  expenses in connection  with: (A) the
negotiation and preparation of this Agreement or any of the other Loan Documents
any  amendment  of or  modification  of this  Agreement or any of the other Loan
Documents, or, (B) the administration of this Agreement or any of the other Loan
Documents  and  the  transactions  contemplated  hereby  and  thereby,  (C)  any
litigation,  contest, dispute, suit, proceeding or action (whether instituted by
Lender,  Borrower or any other  Person) in any way  relating to the  Collateral,
this Agreement or any of the other Loan Documents or Borrower's affairs, (D) any
attempt to enforce any rights of Lender  against  Borrower  or any other  Person
which may be obligated to Lender by virtue of this Agreement or any of the other
Loan Documents,  including,  without limitation, the Account Debtors, or (E) any
attempt to inspect, verify, protect, preserve, restore, collect, sell, liquidate
or otherwise dispose of or realize upon the Collateral, then, in any such event,
the reasonable  attorneys' fees actually incurred arising from such services and
all  expenses,  costs,  charges  and other fees of such  counsel or of Lender or
relating  to any of the events or actions  described  in this  Section  shall be
payable,  on demand, by Borrower to Lender, and shall be additional  Obligations
hereunder  secured by the  Collateral.  Without  limiting the  generality of the
foregoing,  such expenses, costs, charges and fees may include accountant' fees,
costs,  and expenses,  court costs and expenses,  photocopying  and  duplicating
expenses,  court  reporter  fees,  costs and expenses;  long distance  telephone
charges; air express charges,  telegram charges,  secretarial over-time charges,
and expenses for travel,  lodging and food paid or incurred in  connection  with
the performance of such legal services.  Additionally,  if any taxes  (excluding
taxes  imposed upon or measured by the net income of Lender) shall be payable on
account of the  execution  or  delivery  of this  Agreement,  or the  execution,
delivery,  issuance  or  recording  of any of the other Loan  Documents,  or the
creation  of any of the  Obligations  hereunder,  by reason of any  existing  or
hereafter  enacted  federal or state statute,  Borrower will pay all such taxes,
including,  but not limited to, any interest  and  penalties  thereon,  and will
indemnify  and hold Lender  harmless  from and against  liability in  connection
therewith.

           10.6. Indulgences Not Waivers. Lender's failure, at any time or times
hereafter,  to require  strict  performance by Borrower of any provision of this
Agreement shall not waive,  affect or diminish any right of Lender thereafter to
demand strict compliance and performance therewith.  Any suspension or waiver by
Lender of an Event of Default by  Borrower  under this  Agreement  or any of the
other Loan  Documents  shall not  suspend,  waive or affect  any other  Event of
Default by Borrower  under this  Agreement  or any of the other Loan  Documents,
whether the same is prior or subsequent  thereto and whether of the same or of a
different type. None of the undertakings,  agreements, warranties, covenants and
representations of Borrower contained in this Agreement or any of the other Loan
Documents and no Event of Default by Borrower under this Agreement or any of the
other Loan Documents shall be deemed to have been suspended or waived by Lender,
unless such suspension or waiver is by an instrument in writing  specifying such
suspension or waiver and is signed by a duly authorized representative of Lender
and directed to Borrower.

           10.7.  Severability.   Wherever  possible,  each  provision  of  this
Agreement shall be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of this Agreement shall be prohibited by or
invalid under  applicable law, such provision  shall be ineffective  only to the
extent of such prohibition or invalidity,  without invalidating the remainder of
such provision or the remaining provisions of this Agreement.

           10.8. Successors  and  Assigns.  This  Agreement  and the other Loan
Documents  shall be binding upon and inure to the benefit of the  successors and
assigns of Borrower and Lender. This provision,  however, shall not be deemed to

<PAGE>


modify Section 10.3 hereof.

           10.9.  Cumulative  Effect;  Conflict of Terms.  The provisions of the
other Loan  Documents  are hereby made  cumulative  with the  provisions of this
Agreement.  Except as otherwise  provided in any of the other Loan  Documents by
specific  reference  to the  applicable  provision  of  this  Agreement,  if any
provision   contained  in  this  Agreement  is  in  direct   conflict  with,  or
inconsistent  with,  any  provision  in any of the  other  Loan  Documents,  the
provision contained in this Agreement shall govern and control.

           10.10.Execution  in  Counterparts.  This Agreement may be executed in
any  number  of  counterparts  and  by  different  parties  hereto  in  separate
counterparts, each of which when so executed and delivered shall be deemed to be
an original and all of which  counterparts  taken together shall  constitute but
one and the same instrument.

           10.11.Notices.  Except as  otherwise  provided  herein,  all notices,
requests  and  demands  to or upon a party  hereto to be  effective  shall be in
writing  and shall be sent by  certified  or  registered  mail,  return  receipt
requested and, unless otherwise  expressly  provided herein,  shall be deemed to
have been validly served,  given or delivered when delivered  against receipt or
one  Business  Day after  deposit in the mail,  postage  prepaid,  addressed  as
follows:

           (A) If to Lender:   NationsBank, N.A. (South)
                               600 Peachtree Street, N.E. - 19th Floor
                               Atlanta, Georgia 30308
                               Financial Strategies Group
                               Telecopy:  (404) 607-6323

           (B) If to Borrower: Theragenics Corporation
                               5325 Oakbrook Parkway
                               Norcross, Georgia 30093
                               Attn: Bruce Smith
                               Telecopy: (770) 381-8447

               With a copy to: Powell, Goldstein, Frazer & Murphy
                               16th Floor
                               191 Peachtree Street, N.E.
                               Atlanta, Georgia 30303
                               Attn:    Richard H. Miller, Esq.
                               Douglas S. Gosden, Esq.
                               Telecopy: (404) 572-6999


or to such other  address as each party may  designate for itself by like notice
given in accordance with this Section 10.11; provided, however, that any notice,
request  or  demand  to or upon  Lender  pursuant  to  Section  2.2 shall not be
effective until received by Lender.

           10.12.Lender's  Consent.  Whenever Lender's consent is required to be
obtained  under this Agreement or any of the other Loan Documents as a condition
to any action, inaction,  condition or event, Lender shall be authorized to give
or withhold  such consent in its sole and absolute  discretion  and to condition
its  consent  upon  the  giving  of  additional   collateral  security  for  the
Obligations, the payment of money or any other matter.



<PAGE>


           10.13.Demand  Obligations.  Nothing in this Agreement shall affect or
abrogate  the demand  nature of any portion of the  Obligations  expressly  made
payable on demand by this Agreement or by any instrument  evidencing or securing
same, and the occurrence of an Event of Default shall not be a prerequisite  for
Lender's requiring payment of such Obligations.

           10.14.Time of Essence.  Time is of the essence of this Agreement and
the other Loan Documents.

           10.15.Entire Agreement.  This Agreement and the other Loan Documents,
together with all other instruments, agreements and certificates executed by the
parties in connection  therewith or with  reference  thereto,  embody the entire
understanding  and agreement between the parties hereto and thereto with respect
to the subject  matter hereof and thereof and supersede the Amended and Restated
Loan Agreement and all other prior agreements,  understandings  and inducements,
whether  express  or  implied,  oral or  written.  Nothing  contained  herein is
intended (or shall be construed) to be a novation of any indebtedness  evidenced
by the Amended and Restated Loan Agreement or to affect or modify the perfection
or priority of Lender's security interests in, security titles to or other liens
on any Collateral.

           10.16.Set-Off.  In  addition to any rights now or  hereafter  granted
under this  Agreement or  otherwise,  and not by way of  limitation  of any such
rights,  upon the occurrence of an Event of Default and during the  continuation
thereof,  Lender  and any  subsequent  holder or  holders of the Note are hereby
authorized  by  Borrower  at any time or from  time to time,  without  notice to
Borrower or to any other Person,  any such notice being hereby expressly waived,
to  set-off  and to  appropriate  and apply  any and all  deposits  (general  or
special, time or demand,  including,  but not limited to, Indebtedness evidenced
by certificates  of deposit,  in each case whether matured or unmatured) and any
other  Indebtedness at any time held or owing by the Lender or such holder to or
for the  credit or the  account  of  Borrower,  against  and on  account  of the
obligations  and  liabilities  of Borrower,  to Lender or such holder under this
Agreement, the Note, and any other Loan Document, including, but not limited to,
all claims of any nature or  description  arising out of or connected  with this
Agreement, the Note, or any other Loan Document,  irrespective of whether or not
(a) the Lender or the holder of the Note shall have made any demand hereunder or
(b) Lender shall have  declared  the  principal of and interest on the Loans and
Note and other  amounts  due  hereunder  to be due and payable as  permitted  by
Section 9.2 hereof and although  said  obligations  and  liabilities,  or any of
them,  shall be contingent  or unmatured.  Any sums obtained by Lender or by any
subsequent  holder of the Note shall be subject  to the  application  of payment
provisions of Article 2 hereof.

           10.17.GOVERNING  LAW:  CONSENT TO FORUM.  THIS  AGREEMENT  HAS BEEN
NEGOTIATED,  EXECUTED AND  DELIVERED AT AND SHALL BE DEEMED TO HAVE BEEN MADE IN
ATLANTA,  GEORGIA.  THIS  AGREEMENT  SHALL  BE  GOVERNED  BY  AND  CONSTRUED  IN
ACCORDANCE WITH THE LAWS OF THE STATE OF GEORGIA  PROVIDED,  HOWEVER THAT IF ANY
OF THE COLLATERAL SHALL BE LOCATED IN ANY JURISDICTION  OTHER THAN GEORGIA,  THE
LAWS OF SUCH  JURISDICTION  SHALL GOVERN THE METHOD,  MANNER AND  PROCEDURE  FOR
FORECLOSURE  OF  LENDER'S  LIEN  UPON SUCH  COLLATERAL  AND THE  ENFORCEMENT  OF
LENDER'S  OTHER  REMEDIES IN RESPECT OF SUCH  COLLATERAL  TO THE EXTENT THAT THE
LAWS OF SUCH  JURISDICTION  ARE DIFFERENT FROM OR INCONSISTENT  WITH THE LAWS OF
GEORGIA. AS PART OF THE CONSIDERATION FOR NEW VALUE THIS DAY RECEIVED, BORROWER

<PAGE>


HEREBY CONSENTS TO THE JURISDICTION OF ANY STATE OR FEDERAL COURT LOCATED WITHIN
FULTON COUNTY OF THE STATE OF GEORGIA AND WAIVES PERSONAL SERVICE OF ANY AND ALL
PROCESS  UPON IT AND  CONSENTS  THAT  ALL SUCH  SERVICE  OF  PROCESS  BE MADE BY
CERTIFIED  OR  REGISTERED  MAIL  DIRECTED TO  BORROWER AT THE ADDRESS  STATED IN
SECTION  10.11 HEREOF AND SERVICE SO MADE SHALL BE DEEMED TO BE  COMPLETED  UPON
ACTUAL RECEIPT THEREOF.  BORROWER WAIVES ANY OBJECTION TO JURISDICTION AND VENUE
OF ANY ACTION INSTITUTED  AGAINST IT AS PROVIDED HEREIN AND AGREES NOT TO ASSERT
ANY DEFENSE BASED ON LACK OF JURISDICTION OR VENUE.

           10.18.WAIVERS BY BORROWER.  EXCEPT AS OTHERWISE  PROVIDED FOR IN THIS
AGREEMENT,  BORROWER  WAIVES,  TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW
(i) THE RIGHT TO TRIAL BY JURY (WHICH  LENDER HEREBY ALSO WAIVES) IN ANY ACTION,
SUIT, PROCEEDING OR COUNTERCLAIM OF ANY KIND ARISING OUT OF OR RELATED TO ANY OF
THE LOAN DOCUMENTS, THE OBLIGATIONS OR THE COLLATERAL, (ii) PRESENTMENT,  DEMAND
AND PROTEST AND NOTICE OF PRESENTMENT,  PROTEST, DEFAULT, NON PAYMENT, MATURITY,
RELEASE, COMPROMISE,  SETTLEMENT,  EXTENSION OR RENEWAL OF ANY OR ALL COMMERCIAL
PAPER,  ACCOUNTS,  CONTRACT RIGHTS,  DOCUMENTS,  INSTRUMENTS,  CHATTEL PAPER AND
GUARANTIES AT ANY TIME HELD BY LENDER ON WHICH BORROWER MAY IN ANY WAY BE LIABLE
AND HEREBY RATIFIES AND CONFIRMS  WHATEVER  LENDER MAY DO IN THIS REGARD;  (iii)
NOTICE PRIOR TO TAKING  POSSESSION  OR CONTROL OF THE  COLLATERAL OR ANY BOND OR
SECURITY  WHICH  MIGHT BE  REQUIRED  BY ANY COURT  PRIOR TO  ALLOWING  LENDER TO
EXERCISE ANY OF LENDER'S  REMEDIES,  INCLUDING THE ISSUANCE OF AN IMMEDIATE WRIT
OF  POSSESSION;  (iv) THE BENEFIT OF ALL VALUATION,  APPRAISEMENT  AND EXEMPTION
LAWS;  AND  (v)  ANY  RIGHT  BORROWER  MAY  HAVE  UPON  PAYMENT  IN  FULL OF THE
OBLIGATIONS  TO  REQUIRE  LENDER  TO  TERMINATE  ITS  SECURITY  INTEREST  IN THE
COLLATERAL  OR IN ANY OTHER  PROPERTY  OF  BORROWER  UNTIL  TERMINATION  OF THIS
AGREEMENT IN ACCORDANCE WITH ITS TERMS AND THE EXECUTION BY BORROWER, AND BY ANY
PERSON  WHOSE  LOANS TO  BORROWER  ARE USED IN WHOLE OR IN PART TO  SATISFY  THE
OBLIGATIONS,  OF AN AGREEMENT INDEMNIFYING LENDER FROM ANY LOSS OR DAMAGE LENDER
MAY INCUR AS THE RESULT OF DISHONORED  CHECKS OR OTHER ITEMS OF PAYMENT RECEIVED
BY LENDER FROM BORROWER OR ANY ACCOUNT DEBTOR AND APPLIED TO THE OBLIGATIONS.



<PAGE>


           IN WITNESS WHEREOF, this Agreement has been duly executed in Atlanta,
Georgia, on the day and year specified at the beginning hereof.

ATTEST:                                        THERAGENICS CORPORATION



/s/ Lynn M. Rogers                              /s/ Bruce W. Smith
Title: Assistant Secretary                     Title: Secretary, Treasurer &
                                                      Chief Financial Officer

    (CORPORATE SEAL)
                                               NATIONSBANK, N.A. (SOUTH)


                                                /s/ W. Brad Davis
                                               W. Brad Davis
                                               Senior Vice President


<PAGE>


                        REPLACEMENT REVOLVING CREDIT NOTE
December 9, 1996                                                 $11,000,000.00

         FOR  VALUE  RECEIVED,  the  undersigned  (hereinafter  referred  to  as
"Borrower") promises to pay to the order of NATIONSBANK, N.A. (SOUTH), a Georgia
banking corporation,  successor by merger to Bank South (hereinafter referred to
as "Lender") at Lender's  office located in Atlanta,  Georgia,  or at such other
place as the holder hereof may  designate,  the principal sum of ELEVEN  MILLION
AND  NO/100  DOLLARS  ($11,000,000.00),  or so much  thereof  as shall have been
advanced here against and shall be  outstanding,  including all fees or expenses
chargeable  thereon to Borrower  under that certain  Second Amended and Restated
Loan and Security Agreement,  dated as of the date hereof,  between Borrower and
Lender (hereinafter, together with all supplements, riders, amendments, exhibits
or  schedules  thereto,  referred  to as the "Loan  Agreement"),  together  with
interest on so much of the principal  balance of this Note as may be outstanding
and unpaid from time to time.  This  Revolving  Credit Note (this "Note") is the
Revolving  Credit  Note  referred  to in,  and is issued  pursuant  to, the Loan
Agreement  and is  entitled  to all of the  benefits  and  security  of the Loan
Agreement and the other Loan  Documents  described  therein,  but nothing in the
Loan  Agreement  shall affect the demand  nature of this Note.  All  capitalized
terms used herein,  unless  otherwise  specifically  defined in this Note, shall
have the meanings  ascribed to them in the Loan Agreement.  Borrower shall repay
principal  outstanding hereunder and interest as provided in the Loan Agreement.
The Borrower shall be entitled to borrow,  re-pay and re-borrow  funds hereunder
subject to the terms and  conditions  of the Loan  Agreement.  Prepayment of the
principal amount of any Loan may be made only as provided in the Loan Agreement.
The  Borrower  hereby  promises to pay interest on the unpaid  principal  amount
hereof as  provided in Section 2.4 of the Loan  Agreement.  Interest  under this
Note shall also be due and payable  when this Note shall  become due (whether at
maturity, by reason of acceleration or otherwise). Overdue principal and, to the
extent permitted by law, overdue interest, shall bear interest payable on DEMAND
at the default rate as set forth in the Loan  Agreement.  The  occurrence of any
Event of Default under (and as such term is defined in) the Loan Agreement shall
also  constitute  an event of default by Borrower  under this Note  (herein also
called an "Event  of  Default").  Upon the  occurrence  of an Event of  Default,
Lender,  at its option,  without  demand or notice of any kind, may declare this
Note  immediately  due and payable,  whereupon  all  outstanding  principal  and
accrued interest shall become  immediately due and payable;  provided,  however,
that upon the occurrence of any Event of Default described in Section 9.1(G) of
- --------------------------------------------------------------------------------
THIS REVOLVING NOTE IS MADE AND GIVEN IN REPLACEMENT OF, AND AS AN AMENDMENT AND
RESTATEMENT OF (1) A CERTAIN  REVOLVING  CREDIT NOTE DATED DECEMBER 13, 1995, IN
THE ORIGINAL PRINCIPAL AMOUNT OF $4,000,000,  ISSUED BY BORROWER TO THE ORDER OF
LENDER,  (2) A CERTAIN  TERM  NOTE  DATED  SEPTEMBER  14,  1994 IN THE  ORIGINAL
PRINCIPAL AMOUNT OF $2,100,000 ISSUED BY BORROWER TO THE ORDER OF LENDER AND (3)
A CERTAIN LINE OF CREDIT NOTE DATED DECEMBER 13, 1995 IN THE ORIGINAL  PRINCIPAL
AMOUNT OF  $1,000,000  ISSUED  BY  BORROWER  TO THE  ORDER OF LENDER  AND IS NOT
INTENDED TO BE A NOVATION.


<PAGE>


the Loan Agreement,  this Note, without demand,  notice or declaration by Lender
of any kind, shall automatically and immediately become due and payable.

         In case this Note is  collected by or through an  attorney-at-law,  all
costs of such collection incurred by the Lender, including reasonable attorney's
fees, shall be paid by Borrower.

         Time is of the essence of this Note.

         Demand,  presentment,  notice,  notice of demand,  notice for  payment,
protest  and  notice of  dishonor  are  hereby  waived by each and every  maker,
guarantor,  surety and other person or entity primarily or secondarily liable on
this Note. Lender shall not be deemed to waive any of its rights under this Note
unless such  waiver be in writing and signed by Lender.  No delay or omission by
Lender in exercising any of its rights under this Note shall operate as a waiver
of such rights and a waiver in writing on one occasion shall not be construed as
a consent to or a waiver of any right or remedy on any future occasion.

         This Note shall be governed by and construed and enforced in accordance
with the laws of the State of Georgia (without giving effect to its conflicts of
law rules).  Whenever possible, each provision of this Note shall be interpreted
in such manner as to be  effective  and valid under  applicable  law, but if any
provision of this Note shall be prohibited by or invalid under  applicable  law,
such  provision  shall be  ineffective  on to the extent of such  prohibition or
invalidity,  without  invalidating  the  remainder  of  such  provision  or  the
remaining provisions of this Note.

         Words importing the singular number  hereunder shall include the plural
number and vice versa,  and any pronoun used herein shall be deemed to cover all
genders. The word "Lender" as used herein shall include transferees,  successors
and  assigns of Lender,  and all rights of Lender  hereunder  shall inure to the
benefit of its transferees,  successors and assigns. All obligations of Borrower
hereunder shall bind Borrower's successors and assigns.

         SIGNED,  SEALED AND DELIVERED by the undersigned Borrower as of the day
and year first above set forth.


                                             THERAGENICS CORPORATION
(CORPORATE SEAL)

Attest:

                                             By:  /s/ Bruce W. Smith
                                             Title: Secretary, Treasurer &
/s/ Lynn M. Rogers                                  Chief Financial Officer
Title: Assistant Secretary







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