THERAGENICS CORP
10-Q, 1999-05-17
PHARMACEUTICAL PREPARATIONS
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM 10-Q


           (X) QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                  For the quarterly period ended March 31, 1999

                                       or

          ( ) TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

             For the transition period from __________ to __________

                           Commission File No. 0-15443


                             THERAGENICS CORPORATION
             (Exact name of registrant as specified in its charter)


        Delaware                                      58-1528626
 (State or other jurisdiction of                   (I.R.S. Employer
 incorporation or organization)                    Identification Number)


   5203 Bristol Industrial Way
      Buford, Georgia                                     30518
(Address of principal executive offices)               (Zip Code)


       Registrant's telephone number, including area code: (770) 271-0233


Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days. YES X _ NO ___


As of May 14,  1999  the  number  of  shares  of $.01  par  value  common  stock
outstanding was 29,497,734.




<PAGE>



                             THERAGENICS CORPORATION

                                TABLE OF CONTENTS



PART I.  FINANCIAL INFORMATION:

     ITEM 1. FINANCIAL STATEMENTS (UNAUDITED)                           Page No.

          Balance Sheets - December 31, 1998 and March 31, 1999 . . . . .   3

          Statements of Earnings for the three months ended
           March 31, 1998 and 1999 . . . . . . . . . . . . . . . . . . . .  5

          Statements of Cash Flows for the three months ended
           March 31, 1998 and 1999 . . . . . . . . . . . . . . . . . . . .  6

          Statement of Changes in Stockholders' Equity for the three
           months ended March 31, 1999 . . . . . . . . . . . . . . . . . .  7

          Notes to Financial Statements . . . . . . . . . . . . . . . . .   8

      ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
              CONDITION AND RESULTS OF OPERATIONS . . . . . . . . . . . .  10

      ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT
              MARKET RISK . . . . . . . . . . . . . . . . . . . . . . . .  15

PART II.  OTHER INFORMATION

         ITEM 1. LEGAL PROCEEDINGS . . . . . . . . . . . . . . . . . . .   15

      ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K . . . . . . . . . . . . .  15


SIGNATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   16






<PAGE>

<TABLE>


                                             THERAGENICS CORPORATION
                                                  BALANCE SHEETS
                                       DECEMBER 31, 1998 AND MARCH 31, 1999
                                                   (UNAUDITED)

ASSETS

<CAPTION>
                                                                        December 31,                  March 31,
                                                                           1998                         1999
                                                                    -------------------          ------------------

CURRENT ASSETS
<S>                                                             <C>                          <C>               
  Cash and short-term investments                               $         19,541,662         $       23,589,146
  Marketable Securities                                                    6,830,266                  9,522,224
  Trade Accounts Receivable, less                                                
    allowance of $53,773 in 1998 and
    $34,957 at March 31, 1999                                              7,000,446                  4,107,997
  Inventories                                                                780,825                    790,290
  Deferred income tax asset                                                  210,000                    280,000
  Prepaid expenses and other current assets                                  579,132                    588,079
                                                                    -------------------          ------------------

      TOTAL CURRENT ASSETS                                                34,942,331                 38,877,736

PROPERTY AND EQUIPMENT
  Buildings and improvements                                              17,425,990                 17,425,990
  Leasehold improvements                                                     154,234                    154,234
  Machinery and equipment                                                 25,570,513                 28,342,811
  Office furniture and equipment                                             333,816                    362,573
                                                                    -------------------          ------------------

                                                                          43,484,553                 46,285,608
  Less accumulated depreciation and
   amortization                                                           (7,031,902)                (7,911,553)
                                                                    -------------------          ------------------

                                                                          36,452,651                 38,374,055

  Land                                                                       848,359                    848,359
  Construction in progress                                                15,957,453                 14,643,643
                                                                    -------------------          ------------------

      TOTAL PROPERTY AND EQUIPMENT                                        53,258,463                 53,866,057

OTHER ASSETS                                                                  71,782                     69,418
                                                                    -------------------          ------------------


          TOTAL ASSETS                                          $         88,272,576         $       92,813,211
                                                                    ===================          ==================

</TABLE>


The accompanying notes are an integral part of these statements.

<PAGE>
<TABLE>






                                             THERAGENICS CORPORATION
                                                 BALANCE SHEETS
                                      DECEMBER 31, 1998 AND MARCH 31, 1999
                                                   (UNAUDITED)


LIABILITIES & STOCKHOLDERS'  EQUITY

                                                                        December 31,                 March 31,
                                                                           1998                        1999
                                                                    -------------------          ------------------
<CAPTION>

CURRENT LIABILITIES
  Accounts Payable
<S>                                                             <C>                          <C>               
    Trade                                                       $            627,679         $          777,783
    Construction                                                             359,339              
                                                                                                       --
  Accrued salaries, wages and payroll taxes                                  498,863                    534,822
  Income taxes payable                                                       165,182                  1,635,182
  Other current liabilities                                                  316,161                    299,912
                                                                    -------------------          ------------------

      TOTAL CURRENT LIABILITIES                                            1,967,224                  3,247,699

LONG-TERM LIABILITIES

  Deferred income taxes                                                    1,920,000                  2,133,000

STOCKHOLDERS' EQUITY
Common stock, $.01 par value, 100,000,000
  shares authorized; 29,405,571 and 29,435,018
  issued and outstanding                                                     294,056                    294,350
Additional paid-in capital                                                58,921,414                 59,087,757
Retained earnings                                                         25,169,882                 28,050,405
                                                                    -------------------          ------------------

      TOTAL STOCKHOLDERS' EQUITY                                          84,385,352                 87,432,512
                                                                    -------------------          ------------------

          TOTAL LIABILITIES AND
          STOCKHOLDERS' EQUITY                                  $         88,272,576         $       92,813,211
                                                                    ===================          ==================
                                                                    
</TABLE>




The accompanying notes are an integral part of these statements.



<PAGE>

<TABLE>


                                            THERAGENICS CORPORATION
                                            STATEMENTS OF EARNINGS
                                                  (UNAUDITED)

<CAPTION>
                                                                           Three Months
                                                                         Ended March 31,
                                                          -----------------------------------------------------

                                                                   1998                          1999
                                                          -----------------------        ----------------------

REVENUE
<S>                                                   <C>                              <C>                    
  Product sales - affiliate                           $                8,239,985       $             9,105,557
  Product sales - non affiliates                                          15,962                        33,662
  Licensing Fees                                                          25,000                        25,000
                                                          -----------------------        ----------------------

                                                                       8,280,947                     9,164,219

COSTS AND EXPENSES
  Cost of sales                                                        2,188,435                     3,379,785
  Selling, general & administrative                                    1,350,947                     1,406,555
  Research & development                                                  41,411                       139,737
                                                          -----------------------        ----------------------

                                                                       3,580,793                     4,926,077

OTHER INCOME (EXPENSE)
  Interest income                                                        450,712                       276,729
  Interest and financing costs                                           (2,684)                       (6,139)
  Other                                                                    8,937                         3,491
                                                          -----------------------        ----------------------

                                                                         456,965                       274,081

Earnings before income taxes                                           5,157,119                     4,512,223

  Income tax expense                                                   1,856,563                     1,631,700
                                                          -----------------------        ----------------------

NET EARNINGS                                          $                3,300,556       $             2,880,523
                                                          =======================        ======================


NET EARNINGS PER COMMON SHARE

  Basic                                               $                     0.11       $                  0.10
  Diluted                                             $                     0.11       $                  0.10

WEIGHTED AVERAGE SHARES

  Basic                                                               29,087,936                    29,426,480
  Diluted                                                             30,352,859                    29,871,730


</TABLE>

The accompanying notes are an integral part of these statements.




<PAGE>

<TABLE>


                                              THERAGENICS CORPORATION
                                              STATEMENTS OF CASH FLOWS
                                 FOR THE THREE MONTHS ENDED MARCH 31, 1998 AND 1999
                                                    (UNAUDITED)
<CAPTION>

                                                                                              Three Months
                                                                                              Ended March 31,
                                                                             --------------------------------------------
                                                                                    1998                      1999
                                                                             -------------------        -----------------


CASH FLOWS FROM OPERATING ACTIVITIES
<S>                                                                       <C>                         <C>               
  Net Earnings                                                            $           3,300,556       $        2,880,523
  Adjustments to reconcile net earnings to
  net cash provided by operating activities
    Deferred income taxes                                                                75,000                  143,000
    Depreciation & amortization                                                         407,388                  846,390
    Stock based compensation                                                                                      68,919
                                                                                     --
  Changes in assets and liabilities:
   Accounts Receivable                                                                (654,646)                2,892,449
   Inventories                                                                        (114,793)                  (9,465)
   Prepaid expenses and other current assets                                             38,721                  (8,947)
   Other assets                                                                             252                    2,364
   Trade accounts payable                                                             3,207,348                  150,104
   Accrued salaries, wages and payroll taxes                                          (333,194)                   35,959
   Income taxes payable                                                               1,036,158                1,470,700
   Other current liabilities                                                            159,133                 (16,249)
                                                                             -------------------        -----------------

     Total adjustments                                                                3,821,367                5,575,224
                                                                             -------------------        -----------------

       Net cash provided by operating activities                                      7,121,923                8,455,747

CASH FLOWS FROM INVESTING ACTIVITIES
  Purchases and construction of property and equipment                             (13,173,309)              (1,824,410)
  Purchases and maturities of marketable securities                                                          (2,680,871)
                                                                                     --
                                                                             -------------------        -----------------

      Net Cash used by investing activities                                        (13,173,309)              (4,505,281)


CASH FLOWS FROM FINANCING ACTIVITIES
 Exercise of stock options and stock purchase plan                                       90,877                   97,018
                                                                             -------------------        -----------------

      Net Cash provided by financing activities                                          90,877                   97,018

NET INCREASE (DECREASE) IN CASH AND
  SHORT-TERM INVESTMENTS                                                            (5,960,509)                4,047,484

CASH AND SHORT-TERM INVESTMENTS AT
  BEGINNING OF PERIOD                                                                30,161,614               19,541,662
                                                                             -------------------        -----------------

CASH AND SHORT-TERM INVESTMENTS AT
                    END OF PERIOD                                          $         24,201,105       $       23,589,146
                                                                             ===================        =================

</TABLE>

The accompanying notes are an integral part of these statements.




<PAGE>

<TABLE>




                             THERAGENICS CORPORATION
                        STATEMENT OF STOCKHOLDERS' EQUITY
                    FOR THE THREE MONTHS ENDED MARCH 31, 1999
                                   (UNAUDITED)


<CAPTION>
                                                             Common Stock                      
                                                    --------------------------------    Additional
                                                       Number of         Par value        paid-in         Retained
                                                        shares             $0.01          capital         earnings          Total
                                                    ---------------    -------------   -------------   -------------    ------------

<S>               <C> <C>                            <C>               <C>             <C>              <C>             <C>        
BALANCE, December 31, 1998                           29,405,571,571      $294,056       $58,921,414      $25,169,882     $84,385,352

Exercise of stock options and warrants                       28,075           281            80,921                           81,202

Stock-based compensation                                         --                          68,919                           68,919

Shares issued under employee stock purchase plan              1,372            13            15,803                           15,816

Income tax benefit from exercise of stock
  options and early disposition of shares                                                       700                              700

Net earnings for the period                                                               2,880,523         2,880,523
                                                     --------------    -------------   -------------    -------------   ------------

   BALANCE, March 31, 1999                               29,435,018      $294,350       $59,087,757       $28,050,405    $87,432,512
                                                     ==============    =============   =============    =============   ============



</TABLE>


The accompanying notes are an integral part of these statements.



<PAGE>



THERAGENICS CORPORATION

NOTES TO FINANCIAL STATEMENTS
- -----------------------------
MARCH 31, 1999
- --------------
(Unaudited)


NOTE A - BASIS OF PRESENTATION

The interim  financial  statements  included  herein  have been  prepared by the
Company without audit. These statements  reflect all adjustments,  which are, in
the opinion of management, necessary to present fairly the financial position as
of March 31, 1999, the results of operations and cash flows for the three months
ended March 31, 1998 and 1999 and the  changes in  stockholders'  equity for the
three  months  ended  March  31,  1999.  All  such  adjustments  are of a normal
recurring nature. Certain information and footnote disclosures normally included
in  financial   statements   prepared  in  accordance  with  generally  accepted
accounting  principles have been condensed or omitted. The Company believes that
the financial  statements and  disclosures  are adequate to make the information
not  misleading.  It is suggested that these  financial  statements and notes be
read in conjunction with the audited financial statements and notes for the year
ended December 31, 1998, included in the Form 10-K filed by the Company.

NOTE B - CONSTRUCTION IN PROGRESS AND PURCHASE COMMITMENTS

Construction  in progress  consists  primarily of payments made toward a project
for  construction  of  manufacturing  equipment and facilities  expansion.  This
project is expected to be completed in phases during 1999.  The Company  expects
to invest an additional  $17.4 million to complete the remaining  phases of this
project.  Of the remaining $17.4 million of purchase  commitments,  $8.5 million
was denominated in Belgian Francs, based on the period end rate of exchange.

Included in  construction  in progress at March 31, 1999 are  progress  payments
totaling  approximately  $5.9 million related to equipment being  constructed in
Belgium.  Upon completion of construction,  the equipment will be transported to
the United States and installed in the Company's U.S. manufacturing facilities.

In April 1999 the Company announced that the U.S. Department of Energy (DOE) has
granted  Theragenics  access to unique DOE  technology  for use in production of
Pd-103.  This technology venture represents part of a DOE initiative to redirect
Cold War assets to peacetime use and cushion the economic impact of U.S. Defense
Department  cutbacks.  This  project  is  expected  to  enable  the  Company  to
significantly  increase  its  production  capacity and allow for expanded use of
Pd-103 and  TheraSeed(R)  beyond  treatment  of  prostate  cancer to new medical
applications.  The  Company  expects  to  construct  a  facility  in Oak  Ridge,
Tennessee to house the  equipment,  infrastructure  and work force  necessary to
support the production of Pd-103 using this DOE technology.  The Company expects
to invest  approximately  $25  million  over the next three  years to build this
manufacturing and R&D facility,  with less than $12 million expected to be spent
during 1999. Construction is expected to commence in the second quarter of 1999.


NOTE C - LITIGATION

In January  1999,  the Company and certain of its  officers and  directors  were
named as defendants in certain securities  actions,  alleging  violations of the
federal  securities laws,  including Sections 10(b), 20(a) and Rule 10b-5 of the
Securities  and Exchange Act of 1934, as amended.  As of this time,  eleven such
actions  are pending in the U.S.  District  Court for the  Northern  District of
Georgia. The complaints,  which are substantially similar in nature,  purport to
represent a class of investors who purchased or sold securities  during the time
period  from  January 29, 1998 to January 11,  1999.  The  complaints  generally
allege that the  defendants  made certain  misrepresentations  and  omissions in
connection  with the  performance  of the Company  during the class period.  The
complaints seek unspecified  damages.  No answer or otherwise  responsive papers
are yet due from the defendants.  Management  believes these charges are without
merit and intends to vigorously oppose the litigation, however, given the nature
and early  stage of the  proceedings,  the  ultimate  outcome of the  litigation
cannot be determined at this time.  Accordingly,  no provision for any liability
that might  result  from this  litigation  has been made.  The  Company  and its
officers and directors maintain insurance for claims of this general nature.



<PAGE>


Item 2.   Management's' Discussion and Analysis of Financial Condition and
          ----------------------------------------------------------------
          Results of Operations
          ---------------------

Results of Operations

Revenues

Revenues for the quarter ended March 31, 1999  increased  $883,000 or 10.7% over
the comparable  1998 period.  The increase in revenues was  attributable  to the
Company's   continued  ability  to  increase  production  of  TheraSeed(R)  with
additional  cyclotron and assembly  capacity.  Eight  cyclotrons were in service
during the first quarter of 1999,  compared to four cyclotrons in service during
the comparable 1998 period.

The softness in sales that the Company first recognized in the fourth quarter of
1998  continued  into the first  quarter  of 1999 as sales  declined  from those
recorded in 1998's fourth quarter.  As stated in the Company's  Annual Report on
Form 10-K for the Year Ended December 31, 1998, the Company's marketing partner,
Indigo Medical,  Inc. (Indigo),  a Johnson and Johnson company,  has advised the
Company  that it  continues  to adjust  its sales and  marketing  strategies  to
address the  softness in sales  primarily by  increasing  the focus on marketing
efforts directed to patients.

Looking forward, the full impact of Indigo's increased focus on patient directed
marketing  efforts may not be realized  for  several  months  since a patient is
typically  not  treated  until six weeks to three  months  or more  after  being
diagnosed with prostate  cancer.  Therefore,  there are no assurances that sales
for the second  quarter of 1999 will increase  versus the first quarter of 1999.
Management  believes that Indigo's patient directed marketing focus could have a
positive  impact  on  sales in the  second  half of 1999,  though  there  are no
assurances that these efforts will not take longer to have an impact on revenue,
if any.  Actual results may differ  materially from those  anticipated  based on
certain  risks  and  uncertainties,  such as the  impact of  Indigo's  marketing
efforts to  consumers  and medical  professionals.  Management  is  confident in
Indigo's  commitment  of both talent and  resources  to its  objective of making
TheraSeed(R) the treatment of choice for prostate cancer.

Costs and Expenses

Cost of sales for the  quarter  ended March 31, 1999  increased  $1,191,000,  or
54.4% over the comparable 1998 period.  Cost of sales as a percentage of revenue
increased  to 36.9% for the quarter  ended March 31, 1999 from 26.4%  during the
comparable  1998 period.  This increase was  attributable  to an increase in the
manufacturing   fixed  cost  base  as  depreciation  and  other  fixed  expenses
associated with additional  cyclotrons and new manufacturing  facilities,  which
were not in service during the first quarter of 1998,  were incurred  during the
first quarter of 1999. As additional  cyclotrons come on line, margins generally
decline  because  each  machine  represents  excess  capacity for a period while
carrying  its  full  component  of fixed  costs,  including  depreciation.  With
cyclotron  numbers nine through  thirteen  expected to be brought on line during
the last three quarters of 1999,  cost of product sales are expected to continue
to  increase as a percent of revenue to the extent  that  additional  cyclotrons
create capacity more rapidly than the growth in demand. Additionally, the number
of  production  related  employees  during the first quarter of 1999 was greater
than the comparable 1998 period due to the Company's increased operations.
<PAGE>

Selling,  general and administrative ("SG&A") expenses were $1.40 million during
the first quarter of 1999 compared to $1.35 million  during the first quarter of
1998,  an increase of $50,000 or 3.7%.  The  increase  was  primarily  due to an
increase in compensation and benefits.

Research and development ("R&D") expenses were $140,000 for the first quarter of
1999  compared to $41,000  for first  quarter of 1998.  The  increase in R&D was
primarily a result of development  efforts to improve the Company's  proprietary
production  processes.  In connection with the Company's  efforts to enhance its
production  processes and its objective to expand the  application of Pd-103 and
TheraSeed(R) to other oncological and non-oncological  uses, management plans to
significantly  increase  efforts and  investment in research and  development in
1999.  R&D  expenditures  during  1999 could be more than  three  times the 1998
levels. However, R&D spending is dependent on appropriate  opportunities arising
so no assurances can be made as to spending amounts.  As a result,  R&D expenses
may fluctuate significantly from period to period.

In April 1999 the Company announced that the U.S. Department of Energy (DOE) has
granted  Theragenics  access to unique DOE  technology  for use in production of
Pd-103 (See "Liquidity and Capital  Resources"  below). The Company expects that
the use of this  technology and the related  infrastructure  will  significantly
increase the Company's production capacity for Pd-103. In addition,  the Company
expects  that  this  increased  production  capacity  will make  additional  R&D
resources and opportunities  available as that technology  becomes  operational,
which is not expected before 2001.

Other  income was  $274,000  in the first  quarter of 1999  compared to $457,000
during the same period in 1998. The decrease was  attributable  to a decrease in
the funds available for investment  during the 1999 period.  Funds available for
investment  have and will continue to be utilized for the Company's  current and
future expansion programs.  As funds continue to be used for expansion programs,
management expects other income to decline accordingly.

The Company's  effective income tax rate was  approximately  36% for each of the
quarters ended March 31, 1999 and 1998.

Liquidity and Capital Resources

The Company had cash and  short-term  investments  of $23.6 million at March 31,
1999  compared  to  $19.6  million  at  December  31,  1998.  The  increase  was
attributable  to cash provided by operations of $8.5 million offset by cash used
by investing activities of $4.5 million.

Operating activities generated $8.5 million in cash. This primarily consisted of
net earnings of $2.9 million,  non-cash  expenses,  primarily  depreciation  and
amortization, of $1.1 million, a decrease in accounts receivable of $2.9 million
and an increase in income taxes payable of $1.5 million.

Cash used by  investing  activities  was $4.5  million for the first  quarter of
1999,  comprised  of $1.8  million  for  capital  expenditures  and $2.7 for net
investments  in  marketable  securities.  Capital  expenditures  are expected to
increase  significantly  throughout 1999. These expenditures relate primarily to
capital  expansion  projects  including  the  addition  of  cyclotrons  and  new
manufacturing  and  support  facilities,  including  investments  related to the
Company's agreement with the U.S. Department of Energy (see below).

Currently  there are eight  cyclotrons  in operation  marking the  completion of
Phase I of an expansion project. Additional phases of this project are currently

<PAGE>

underway,  consisting of the purchase of six additional cyclotrons (numbers nine
through fourteen) and supporting  facilities during 1999,  although one of these
cyclotrons is not expected to be operational until early 2000. Cyclotron numbers
nine and ten are currently  being  installed and are expected to be  operational
during the second quarter of 1999.  Approximately  $14.4 million of construction
in progress at March 31, 1999 relates to this expansion project, and the Company
expects to invest an additional  $17.4 million to complete the remaining  phases
of this project.

As  previously  stated,  in  April  1999  the  Company  announced  that the U.S.
Department of Energy (DOE) has granted Theragenics access to unique DOE
technology for use in production of Pd-103. This technology venture represents
part of a DOE initiative to redirect Cold War  assets to  peacetime  use and
cushion the economic impact of U.S. Defense Department  cutbacks.  The Company
expects that the use of this technology will significantly increase its capacity
and allow for  expanded  use of Pd-103  and  TheraSeed(R)  beyond  treatment  of
prostate cancer to new medical applications.  The Company expects to construct a
facility in Oak Ridge, Tennessee to house the equipment, infrastructure and work
force  necessary to support the production of Pd-103 using this DOE  technology.
The Company  expects to invest  approximately  $25  million  over the next three
years to build this  manufacturing and R&D facility,  with less than $12 million
expected to be spent  during 1999.  Construction  is expected to commence in the
second quarter of 1999.

As part of this project, the Company has leased land in the Oak Ridge, Tennessee
area and equipment  previously used by the government to produce isotopes.  As a
result of the sensitive  nature of the  equipment,  the  specialized  technology
involved and the access to unique DOE-operated facilities,  the Company has 
contra ted with the DOE's primary  contractor for the Oak Ridge  government
installation  to handle  certain  technical  and  operational  services that are
critical to the project,  including  moving,  reassembling  and  recommissioning
equipment  currently  in  storage,  designing  and  fabricating  new  parts  and
modifications  to the equipment and DOE facilities;  and operating and providing
ongoing access to the DOE facilities. The success of the project is dependent on
the continued cooperation of the DOE and its primary contractor,  which could be
adversely  affected by future  changes in  governmental  program  priorities and
funding.  If the equipment cannot be moved and recommissioned  successfully,  if
there are  problems  with the  operation  or  modification  of the  DOE-operated
facilities, or if unforeseen challenges arise, the project may not be successful
or the costs or  timeliness  associated  with the project  could exceed  current
estimates.

Cash provided by financing  activities  was $97,000 in the first quarter of 1999
representing  cash  proceeds from the exercise of stock options and the employee
stock purchase plan.

The Company currently has a $15 million revolving credit facility collateralized
by  substantially  all of the Company's  assets.  No borrowings were outstanding
under this revolving credit facility as of March 31, 1999 or the current date.

The Company believes that current cash and investment balances, cash from future
operations  and credit  facilities,  will be  sufficient  to meet its  currently
anticipated working capital and capital expenditure  requirements.  In the event
additional  financing  becomes  necessary,  management may choose to raise those
funds through other means of financing as appropriate.

Foreign Currency and Geographic Information

The Company has outstanding  purchase commitments of approximately $17.4 million
related to the  completion of its expansion  project  related to cyclotrons  and
supporting  facilities.  Of these  commitments,  approximately  $8.5  million is
denominated in Belgian Francs, based on the exchange rate at March 31, 1999.

<PAGE>

This exposes the Company to foreign  currency risk as it relates to movements in
the exchange  rate between the U.S.  dollar and the Belgian  Franc.  The Company
manages this risk by frequently reviewing the status of the purchase commitments
and  entering  into  foreign  exchange  forward  contracts  to hedge the foreign
currency risks when believed it is appropriate to do so. Such forward  contracts
typically  mature  concurrently  with  payments  required  under  the  equipment
purchase contracts. The Company does not hold foreign exchange forward contracts
for trading or speculative  purposes. At March 31, 1999 the Company did not hold
any foreign exchange forward contracts. Additionally, management does not expect
the  introduction  of the EURO to have any  effect on its  purchase  commitments
denominated  in  Belgian  Francs.  The  terms of the  agreements  allow  for all
payments to be made in Belgian  Francs,  and the  contracts  are  expected to be
completed prior to the time that use of the EURO is mandatory.

All balance sheet accounts denominated in foreign currencies are translated into
U.S.  dollars at the period-end  rate of exchange.  Such balance sheet accounts,
which were not significant at March 31, 1999, included a cash account maintained
in Belgium  and  denominated  in Belgian  Francs.  Additionally,  statements  of
earnings  items  and  foreign  currency  transaction  gains or  losses  were not
significant during the quarter ended March 31, 1999.

Included in  construction  in progress at March 31, 1999 are  progress  payments
totaling  approximately  $5.9 million related to equipment being  constructed in
Belgium.  Upon completion of construction,  the equipment will be transported to
the United States and installed in the Company's U.S. manufacturing facilities.

Impact of the Year 2000 Issue

Introduction

Many computer  systems used today were designed and developed  using two digits,
rather than four, to specify the year. Consequently,  such systems may recognize
a date of "00" as the year 1900  instead of the year 2000.  Other  problems  may
also be encountered,  such as the inability to recognize special codes that make
use of the date field.  These and other  problems may exist in primary  software
products and  embedded  systems  such as  microcontrollers.  This may cause many
computer systems to fail or create inaccurate results unless corrective measures
are taken.  Additionally,  a company may be affected by the computer  systems of
their  customers  and  vendors,  even though that  company's  internal  computer
systems may be Year 2000 (Y2K) compliant.

State of Readiness

The  Company  began to assess the status of its Y2K  readiness  during  1997 and
developed a plan intended to make its information  technology assets,  including
embedded  microcontrollers  ("IT assets"),  year 2000 ready. The plan covers the
following  phases:  (i)  inventory  of IT  assets,  (ii)  assessment  of  repair
requirements (iii) repair and testing, and (iv) creation of contingency plans in
the event of Y2K related failures. The inventory and assessment phases have been
completed for all critical IT assets.  Repairs and testing of critical IT assets
is currently  in process and is scheduled to be completed in the second  quarter
of 1999.

The Company's Y2K  compliance  also depends upon the  compliance of others.  The
Company  has  contacted  its  critical  suppliers  and  significant  customer to
evaluate  their Y2K programs and state of readiness,  and to evaluate  whether a
Y2K related disruption at these entities would have a material adverse effect on
the Company's  operations as the year 2000 approaches.  At the current date, the
Company has received responses from approximately 74% of the entities contacted,
none of which have indicated that a year 2000 related  business  interruption is
anticipated. However, while the Company believes it is taking reasonable action

<PAGE>

in this regard, Theragenics is not in a position to guarantee the performance of
others or predict  whether any  assurances  and  representations  received  from
others will ultimately prove to be accurate. Additionally, the Y2K compliance of
the Company's critical suppliers and significant  customer also depends upon the
Y2K  compliance  of their  critical  suppliers and  customers.  The Company also
relies on governmental agencies,  utility companies,  telecommunication  service
providers,  financial  institutions and other service  providers  outside of the
Company's  control.  There is no assurance  that any of these  entities will not
experience a year 2000 related failure and business interruption.  Such failures
could have a material  adverse  effect on the Company's  financial  position and
results of operations.


Costs to Address the Year 2000 Issue

The Company has incurred  costs of  approximately  $60,000 in addressing the Y2K
issue,  consisting primarily of replacing IT assets that were not Y2K compliant.
Remaining costs of Y2K remediation are not expected to be material.

Risks of the Company's Year 2000 Issues

The Company  has not  currently  identified  any  critical  IT assets  under its
control  that  present a material  risk of not being Y2K  compliant  in a timely
manner, or for which an acceptable alternative cannot be implemented. As testing
continues  however,  it is  possible  that IT assets  could be  identified  that
present a material  risk of a Y2K  interruption,  and that such an  interruption
could have a material  adverse  effect on the Company's  financial  position and
results of operations.

The Company  does not possess  the  ability to control its  critical  suppliers,
significant  customer or the health care providers that utilize its product. Y2K
related  disruptions  at these  entities could result in delays in the supply of
goods and services,  capital  equipment and  construction of facilities from the
Company's vendors,  delays in receiving payments from the Company's  significant
customer,  and delays in the ordering of product and scheduling of  TheraSeed(R)
procedures  by the health care  providers,  among other things.  Such  potential
delays  could  be of a  short-term  nature  or  could  be more  significant  and
longer-term. The failure of any of these entities to properly address their year
2000 issues could have a materially  adverse  effect on the Company's  financial
position and results of operations.  Additionally,  the failure of the Company's
primary  equipment vendor to deliver  cyclotrons in accordance with the terms of
the purchase  contracts could have a materially  adverse effect on the Company's
ability to increase its production capacity.

Contingency Plans

Contingency  plans for critical IT assets are currently being  developed.  These
contingency plans are in the early stages of development and will be modified as
the risks of potential Y2K interruptions continue to be assessed.

Forward Looking and Cautionary Statements

This document contains certain forward-looking  statements within the meaning of
the  Private  Securities  Litigation  Reform  Act  of  1995  including,  without
limitation,  statements  regarding,  the timing of  possible  impact of Indigo's
sales and marketing efforts,  future cost of sales, R&D expenses, SG&A expenses,
expansion  plans,  the Oak Ridge project,  possible  electronic  data processing
issues related to the year 2000, the development of new technologies,  processes
and products, adverse changes in governmental program priorities and budgetary

<PAGE>

funding by the relevant governmental authorities,  potential costs and delays in
the startup and  refinement  of  technology  and  related  equipment,  potential
equipment failure,  inability to obtain, construct or install necessary parts or
modifications to production  equipment or facilities,and  the sufficiency of the
Company's  liquidity and capital  resources.  From time to time, the Company may
also make other  forward-looking  statements relating to such matters as well as
anticipated   financial   performance,    business   prospects,    technological
developments,  research and development  activities and similar  matters.  These
forward-looking statements are subject to certain risks, uncertainties and other
factors  which  could  cause  actual  results  to differ  materially  from those
anticipated, including risks associated with the management of growth, Year 2000
issues,  research and  development  activities,  effectiveness  and execution of
Indigo's marketing and sales programs,  government regulation of the therapeutic
radiological  pharmaceutical  and device  business,  dependence  on health  care
professionals,   and   competition   from  other   brachytherapy   products  and
conventional and newly developed methods of treating localized cancer.

Item 3.  Quantitative and Qualitative Disclosures About Market Risk

See Item 2,  "Management's  Discussion  and Analysis of Financial  Condition and
Results of Operations; Foreign Currency and Geographic Information".



PART II.  OTHER INFORMATION


Item 1.  Legal Proceedings.

See Note C to the  Company's  financial  statements  included  in Item 1 of this
report, which is incorporated by reference hereby.

Item 6.  Exhibits and Reports on Form 8-K.

    (a)  Exhibit  10.1 -  Sublease  dated  March 25,  1999  between  Theragenics
         Corporation and Community Reuse Organization of East Tennessee*
    (b)  Exhibit 10.2 - Work For Others  Agreement  dated  March 25, 1999  
         between  Theragenics  Corporation and Lockheed Martin Energy
         Research Corporation*
    (c)  Exhibit 27 - Financial Data Schedule

    (d) Reports on Form 8-K.

         No reports on Form 8-K were filed  during the  quarter  ended March 31,
         1999.

    *    -  Confidential  portions  of Exhibit 10 have been  redacted  and filed
         separately with the Securities and Exchange Commission.


<PAGE>



                                   SIGNATURES


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 thereunto duly authorized.


                                   REGISTRANT:

                                   THERAGENICS CORPORATION



                                   By: /s/  M. Christine Jacobs   
                                      --------------------------
                                      M. Christine Jacobs
                                      Chief Executive Officer


                                      /s/ Bruce W. Smith       
                                     ---------------------------
                                      Bruce W. Smith
                                      Treasurer and Chief Financial Officer
Dated:  May 17, 1999






                 COMMUNITY REUSE ORGANIZATION OF EAST TENNESSEE

                                    SUBLEASE

         THIS  SUBLEASE,  entered  into  this  25 day  of  March,  1999  between
COMMUNITY  REUSE   ORGANIZATION  OF  EAST  TENNESSEE,   a  Tennessee   nonprofit
corporation hereinafter referred to as "CROET," and THERAGENICS  CORPORATION,  a
Delaware  corporation,  hereinafter referred to as the "Sublessee," provides for
the use and development by the Sublessee of  Government-owned  real and personal
property held by CROET  pursuant to two Leases from the United States of America
acting by and  through  the  Department  of Energy,  hereinafter  referred to as
"DOE." The  DOE-CROET  leases are (1) a lease  entered into January 16, 1996, as
amended by  Supplemental  Agreement of Outgrant No. 1 effective  April 28, 1998,
and  Supplemental  Agreement  of  Outgrant  No. 2 effective  January  13,  1999,
Supplemental  Agreement  of Outgrant  No. 3 effective  February  23,  1999,  and
Supplemental  Agreement of Outgrant No. 4 effective  February 25, 1999 for a DOE
owned  track of  undeveloped  land near DOE's  East  Tennessee  Technology  Park
("ETTP") to be developed by CROET through  arrangements with commercial firms or
public entities,  said lease being  hereinafter  referred to as the "Land Lease"
and, (2)  Department of Energy Lease entered into March 22, 1999,  for the lease
of DOE owned equipment consisting of the Plasma Separation Process ("PSP") to be
used  for  producing  isotopes,  said  lease  hereinafter  referred  to  as  the
"Equipment  Lease."  The Land  Lease and the  Equipment  Lease are  collectively
hereinafter  referred  to as  "Leases."  The  parcel  of land  subleased  to the
Sublessee under this Sublease  consists of approximately 21 acres, is identified
as parcel  HOC-001 on the drawing  attached  hereto as Appendix "A," and will be
referred to throughout this Sublease as the "Premises." In the event  Sublessee,
at its expense, obtains a current survey of the Premises, a legal description of
the Premises  prepared from such survey may, by amendment  executed by CROET and
Sublessee, be incorporated herein.

         CROET does hereby  sublease to  Sublessee,  and  Sublessee  does hereby
sublease from CROET, the Premises and the PSP.

         This Sublease is granted subject to the following terms and conditions:

1.       CROET AUTHORITY TO SUBLEASE. This Sublease is made by CROET pursuant to
         Condition  No. 7 of the Land Lease and Condition No. 6 of the Equipment
         Lease.  So long as Sublessee  makes  payments and performs and complies
         with the other covenants,  terms, and conditions set forth herein to be
         performed or complied with by Sublessee, CROET does hereby covenant and
         agree that  Sublessee may peacefully  hold,  enjoy and use the Premises
         and  the  PSP  during  the  term  hereof   without  any   hindrance  or
         interference.

2.       TERM.

         The term of this  Sublease  shall be May 1, 1999,  and ending April 30,
         2029; provided,  however,  that Sublessee  acknowledges that the Leases
         and this Sublease are terminable by DOE under the provisions  contained
         in  Condition  No.  4 of the  Land  Lease  and  Condition  No. 3 of the
         Equipment Lease.

3.       TERMINATION BY DOE OR CROET.

         (a)      The Sublessee  acknowledges  that DOE may terminate the Leases
                  and this Sublease at any time as provided in Condition No. 4 
                  of the Land Lease and Condition No. 3 of the Equipment Lease; 
                  provided however, in the event of such  termination by DOE, 
                  the  Sublessee  shall be entitled to a refund of any rent paid
                  under paragraph  4(a) below for any period after the date of 
                  termination.  Additionally, in the event DOE terminates the 
                  Land Lease and this Sublease due to national emergency or in 
                  the interest of national defense, CROET acknowledges 
                  and agrees that Sublessee shall be entitled to the 
                  compensation  set forth in Condition No. 41 of the Land Lease 
                  and CROET will assist Sublessee in obtaining such 
                  compensation; provided that this shall not 
                  be construed as imposing  liability on CROET to pay such 
                  compensation if DOE does not do so.

         (b)      CROET may terminate this Sublease at any time by giving 
                  ninety (90) days written notice by the authorized 
                  representative to the Sublessee under any of the following  
                  circumstances:  If the Sublessee fails to  substantially  
                  perform or comply with any of the terms and  conditions 
                  of this  Sublease and continues and persists therein for 
                  ten (10) days after notice thereof in writing by CROET; 
                  provided,  however, if such default is not reasonably capable 
                  of cure within such ten (10) day period,  CROET shall not be 
                  entitled to terminate this Sublease if Sublessee promptly 
                  undertakes to cure such default and diligently pursues such 
                  cure. In the event of such termination,  CROET shall be 
                  entitled to recover from the  Sublessee  the costs incurred by
                  CROET in performing  any obligation  on the part of the 
                  Sublessee to be performed  under the terms of this Sublease 
                  for any period prior to the date of  termination or for costs 
                  incurred by CROET as a result of matters arising after the 
                  date of termination but which resulted from Sublessee's  
                  actions prior to the date of termination.

         (c)      The Sublessee   agrees  to  engage  an   architectural   and
                  engineering firm to design the improvements  Sublessee desires
                  to construct on the Premises  (the  "Facility")  within ninety
                  (90)  days  from  the  date of  this  Sublease.  In the  event
                  Sublessee  does not use  reasonable  efforts to  complete  the
                  Facility  on or before the later of (i) one (1) year after the
                  date of this Sublease, or (ii) the date upon which the PSP and
                  all necessary  component  parts  (including any new parts that
                  need to be ordered or fabricated) are ready to be installed in
                  the  Facility,  CROET  shall have the right to  terminate  the
                  Sublease on not less than thirty (30) days  written  notice to
                  Sublessee  unless Sublessee  promptly  commences to attempt to
                  develop  the  Premises  on or before  thirty  (30) days  after
                  receipt of such notice of default.

         (d)      CROET may terminate  this Sublease in the event that Sublessee
                  fails to obtain all the required  governmental  and regulatory
                  authority,  licenses,  permits,  approval and consents for the
                  development,  use and operation of the  Facility,  the PSP and
                  any  other  equipment  required  for  use in  connection  with
                  Sublessee's  business  operations on the  Premises,  provided,
                  that this shall not be construed as requiring the Sublessee to
                  operate  the PSP on the  Premises  or to  engage  in  activity
                  requiring any particular license.

         (e)      The Sublessee  shall also pay to CROET on demand any sum which
                  CROET is  obligated  to pay to DOE by reason  of  expenditures
                  after  the  expiration,  revocation,  or  termination  of this
                  Sublease in restoring the Premises to the  condition  required
                  by Condition  No. 33 of the Land Lease and Condition No. 23 of
                  the Equipment Lease; provided,  however, this shall not in any
                  manner  relieve  CROET or DOE  from  any of  their  respective
                  liabilities,  to the  extent  the  cause  of such  restoration
                  resulted, in whole or in part, from their acts or omissions.

In any of the above events, the provisions of Condition No. 33 of the Land Lease
and Condition and 23 of the Equipment Lease shall apply to the Premises.

4.       RENT.

         (a)     Land Rent. The Sublessee shall pay to CROET land rental for the
                 premises  according to the following terms:

                 (1)    $  [Confidential  Treatment  Requested]  per month until
                        January 1, 2000.
                 (2)    $ [Confidential Treatment Requested] per annum 
                        [Confidential Treatment Requested] after January 1, 
                        2000, and every year thereafter, to be paid in equal 
                        monthly amounts on the first day of each calendar month;
                        [Confidential Treatment Requested]. The land rental 
                        shall be adjusted as set forth in this paragraph 4(a).  
                        Such rent shall be prorated for any portion of the term 
                        which is not a full calendar month.

                  On January 1, 2005 and each fifth (5th) anniversary thereafter
                  during the term of this  Sublease,  the land  rental  shall be
                  increased by an amount equal to the product of: (i) the amount
                  of  land  rental  set  forth  in  paragraph  4(a)(2)  of  this
                  Sublease,  multiplied by (ii) the fraction whose  numerator is
                  the  Consumer  Price Index (as  hereinafter  defined)  for the
                  calendar  month  just  ended  and  whose  denominator  is  the
                  Consumer Price Index for the calendar month January, 2000. The
                  term  "Consumer  Price  Index" as used  herein  shall mean the
                  Consumer  Price  Index  for All Urban  Consumer  (1982-84=100)
                  specified  for All Items,  U.S. City Average and issued by the
                  Bureau of Labor Statistics of the United States  Department of
                  Labor.  In the event the Consumer Price Index shall  hereafter
                  be  converted  to  a  different  standard  reference  base  or
                  otherwise   revised,   CROET  shall   designate  a  comparable
                  procedure for adjustment of land rent.

         (b)      Equipment  Rent.  The Sublessee  shall pay to CROET  equipment
                  rental, for the PSP, according to the following terms:

                  (1)   $ [Confidential Treatment Requested] per month until the
                        equipment becomes operational.
                  (2)   $ [Confidential  Treatment Requested] per month
                        after the equipment becomes operational,  whether or not
                        it continues in operation.

         (c)      Utilities and Services. The Sublessee shall be responsible for
                  paying the charges for  utilities and services DOE may provide
                  to the Premises under Condition No. 5(b) of the Land Lease, as
                  such  charges are  determined  and  charged by DOE;  provided,
                  however, Sublessee shall only be required to pay for utilities
                  and services actually being used or consumed by Sublessee. The
                  method of payment to DOE shall be  determined by CROET and the
                  Sublessee.  Sublessee  shall be responsible for paying for all
                  utilities  and  services  actually  being used or  consumed by
                  Sublessee  which are  provided  by any  entity  other than DOE
                  under terms and  conditions  to be arranged by Sublessee  with
                  that entity.

         (d)      Additional  Consideration.  The Sublessee shall be responsible
                  for the expense of  maintenance,  operations,  alterations and
                  repairs to the Premises  for the entire term of the  Sublease,
                  and shall pay to the taxing  authority  any taxes  levied as a
                  result of this  Sublease  excluding  any taxes levied on CROET
                  because of its separate status as a corporation.  CROET agrees
                  to  reasonably   cooperate   with  Sublessee  in  seeking  tax
                  relief/abatement  measures  with  applicable  city and  county
                  governmental authorities with respect to the Premises, the PSP
                  and the Sublease.

5.       IMPROVEMENTS  TO THE  PREMISES.  
         ------------------------------
         Consistent with various  requirements  contained in the Land Lease, and
         accepted by the Sublessee  under  Condition No. 9 below,  the Sublessee
         may, at its expense, make such improvements on the Premises,  including
         erecting  structures and making tie-ins to utilities,  as are necessary
         to conduct Sublessee's  business.  Title to all such improvements shall
         be vested in the Sublessee  until the Sublease is terminated or expires
         of its own terms, at which time the status of such improvements will be
         controlled by Condition No. 17 of the Land Lease.  The foregoing  shall
         not in any  manner  restrict  or impair the right of  Sublessee,  if it
         elects,  to remove its trade  fixtures and personal  property  from the
         Premises at the end of the term of this Sublease,  but Sublessee  shall
         be responsible for any damage to the Premises caused by such removal.

6.       EMPLOYMENT.
         ----------

         Consistent with applicable laws, rules, regulations and ordinances, and
         the various requirements contained in the Land Lease, the Sublessee, in
         hiring  workers  for work on the  Premises,  shall give  preference  to
         workers  formerly  employed  at  DOE  installations  on the  Oak  Ridge
         reservation,  all other things being equal among prospective employees.
         The Sublessee shall report to CROET in writing  annually or upon demand
         by CROET the number of employees  working on the  premises  and, to the
         extent  the  Sublessee  has  actual   knowledge  based  on  information
         furnished  to it by CROET or through  arrangements  made by CROET,  the
         number   among  them  who  are   workers   formerly   employed  at  DOE
         installations on the Oak Ridge  reservations.  The Sublessee commits to
         use its best efforts to employ for work on the  premises the  following
         numbers of full-time employees ("FTEs"):

                           Year 1                 * FTEs
                           Year 2                 * FTEs
                           Year 3                 * FTEs
                           Year 4                 * FTEs
                           Year 5                 * FTEs
                           Years Beyond 5         * FTEs
                                             [*Confidential Treatment Requested]

         The sole remedy for failure to achieve, or use Sublessee's best efforts
         to achieve, these employment levels on the premises shall result in the
         Sublessee paying an additional  [Confidential  Treatment  Requested] in
         land rent and equipment  rent for the year involved,  unless  Sublessee
         can demonstrate that business factors beyond its control were the cause
         for not meeting the employment level. Should the Sublessee exceed those
         employment  levels by  [Confidential  Treatment  Requested] or more the
         sublessee  shall pay  [Confidential  Treatment  Requested] less in land
         rent and equipment rent for the years involved.

7.       AUTHORIZED  REPRESENTATIVES. CROET'S representative concerning  the  
         ---------------------------
         provisions of this Sublease  shall be Lawrence  Young, Community Reuse 
         Organization  of East  Tennessee,  107 Lea Way, P.O. Box 2110, Oak 
         Ridge,  Tennessee,  37830,  Tel. No. (423) 482-1336.  The  Sublessee's
         representative shall be Christine Jacobs, Theragenics Corporation, 5325
         Oakbrook  Parkway, Norcross,  Georgia,  30093, Tel. No. (770)-271-0233.
         Any changes in the  designated  representative  or their  respective
         addresses shall be given in writing to the other.

8.       NOTICE.  No  notice,  order,  direction,  determination,   requirement,
         ------
         consent, or approval under this Sublease shall be of any effect, within
         the  restrictions  of this Sublease,  unless provided in writing to the
         authorized representative at the address set forth in paragraph 7 above
         by personal  delivery (or reputable  overnight  courier  service) or by
         certified mail, return receipt requested,  postage prepaid. All notices
         shall be  effective  upon  receipt  at the proper  address.  Refusal to
         accept delivery shall be deemed receipt.

9.       OBLIGATIONS  OF THE  SUBLESSEE.  The Land  Lease and  Equipment  Lease
         ------------------------------
         retain for DOE certain rights and imposes various obligations on CROET.
         Sublessee's  obligations  under this  Sublease  shall be subject to the
         terms and conditions  imposed on CROET under the Leases during the term
         of this Sublease,  and for any period beyond the term, during which the
         rights of DOE and  obligations  of CROET are affected by the failure of
         the  Sublessee  to  recognize,  abide by,  or  fulfill  obligations  of
         Sublessee  under this  Sublease.  Sublease  assumes the  obligations of
         CROET under the Land Lease but only with respect to the  Premises  (and
         not with respect to any other premises  included in the Land Lease) and
         only as to such obligations arising during the term of this Sublease or
         as a result of the performance of the Sublessee.  The Sublessee  agrees
         to hold CROET  harmless  for any failure on its part,  or those  acting
         through it, to recognize,  abide by, or fulfill the obligations assumed
         by  Sublessee  under this  Sublease.  The  assumption  by  Sublessee of
         obligations  under  this  Sublease  is not  intended  to,  nor  does it
         constitute,  an  assignment  by CROET to the Sublessee of the Leases or
         any portion  thereof.  CROET does hereby  indemnify and hold  Sublessee
         harmless  as a result of  CROET's  failure  to  recognize,  abide by or
         fulfill the  obligations of CROET under the Leases,  to the extent such
         obligations  are not  obligations in the Leases which the Sublessee has
         assumed under this Sublease.

         CROET  acknowledges  that Sublesse's  sole  obligations and liabilities
         with respect to loss, damage or destruction of the PSP are as set forth
         in Condition No. 10 of the Equipment Lease.

         In addition,  and without  regard to the  obligations  contained in the
         Leases to which the  Sublessee is obligated,  the  Sublessee  agrees to
         hold CROET  harmless  against any  liabilities of CROET which may arise
         during the term of this Sublease arising out of Sublessee's  negligence
         or wilful  misconduct.  Nothing in this Sublease shall in any manner be
         construed to relieve or release  CROET from any  liability  for its own
         negligence or wilful misconduct.

10.      INSURANCE. In addition to the requirements of the Leases, all insurance
         required of the Sublessee  shall be for the  protection of CROET,  DOE,
         and the Sublessee  against their  respective  risks and liabilities and
         shall be in such form,  for such period of time, and with such insurers
         as CROET and DOE may reasonably require. Insurance of the types, and in
         the amounts, shall include at least the following:

               General Liability                              $*
               Automobile, if applicable to Sublessee         $*
               Workman's Compensation                        (statutory amount)
                                            [*Confidential Treatment Requested]

         A  certificate  of  insurance  or a  certified  copy of each  policy of
         insurance  shall be  furnished  to CROET and DOE's  Realty  Officer and
         DOE's  Account  Executive  prior to use of the Premises or the PSP. The
         Sublessee  agrees  that not less than  thirty  (30)  days  prior to the
         expiration of any insurance required by this Sublease,  it will furnish
         to CROET  and  DOE's  Realty  Officer  and DOE's  Account  Executive  a
         certificate  of insurance or a certified copy of each renewal policy to
         cover the same risks.  The Sublessee shall provide evidence of adequate
         insurance  coverage for Bodily Injury and Property Damage.  Each policy
         of insurance  against loss or damage to DOE's  property  shall name the
         Sublessee,  CROET,  and DOE as the  insured  and  shall  contain a loss
         payable clause reading substantially as follows:

                  "Loss,  if any, under this policy shall be adjusted with (name
                  of Sublessee) and the proceeds, at the direction of DOE, shall
                  be payable to (name of  Sublessee),  and  proceeds not paid to
                  (name of  Sublessee)  shall be payable to the Treasurer of the
                  United States of America."

        Additionally,  each policy of  insurance  shall  contain an  endorsement
        reading substantially as follows:

                  "The  insurer  waives  any right of  subrogation  against  the
                  United  States of America  which  might arise by reason of any
                  payment made under this policy."

         The  Sublessee is  encouraged to carry  business  disruption  insurance
         sufficient to cover losses due to interruption  of business  activities
         under this Sublease  caused by events of every kind.  CROET will not be
         liable for any such losses,  whether or not the Sublessee  carries such
         insurance,  and the  Sublessee  agrees  to waive  any  claims  it might
         otherwise have against CROET for such losses;  provided,  however, this
         shall  not  in  any  manner  relieve  CROET  from  and  liabilities  or
         obligations arising out of CROET's negligence or wilful misconduct.

11.      DOE - CROET LAND LEASE  OBLIGATIONS.  CROET hereby covenants and agrees
         -----------------------------------
         to comply with all  obligations  of the tenant under the Land Lease and
         the Equipment Lease; provided, however, to the extent that Sublessee is
         obligated  under this  Sublease for any such  obligations,  CROET shall
         have no responsibility therefor. In the event CROET receives any notice
         of any default,  event of default, or non-compliance with the terms and
         conditions  of the Land  Lease  or the  Equipment  Lease,  and in DOE's
         judgment CROET is not taking adequate steps to cure the default,  CROET
         shall promptly advise Sublessee of such matters. CROET hereby grants to
         Sublessee the right (but not the obligation, unless otherwise set forth
         in  this   Sublease)  to  cure  any   default,   event  of  default  or
         non-compliance  with the Land Lease or the Equipment Lease. Any amounts
         expended by Sublessee in a  successful  cure may be offset  against any
         amounts due under this Sublessee, but only to the extent that Sublessee
         is not obligated under the terms of this Sublease for such  performance
         under the Land Lease or the Equipment Lease.

12.      EMINENT  DOMAIN.  If all or any part of the Premises shall be 
         ---------------
         appropriated  or condemned by any public or  quasi-public  authority in
         the exercise of its right of condemnation or eminent domain, both CROET
         and  Sublessee  shall have the right to  prosecute a claim for an award
         and to share in the  proceeds  of any and all  awards  based upon their
         respective  interests as hereafter set forth. If all the Premises shall
         be appropriated or condemned,  or so much thereof that Sublessee cannot
         reasonably  continue  the  operation  of  its  business  thereon,  this
         Sublease  shall  terminate  as of the  time  when  possession  shall be
         required by such public or  quasi-public  authority.  In the event that
         this  Subleases  shall not terminate  after any part of the Premises is
         taken or  condemned,  there shall be a reduction in rental equal to the
         percentage  to the  ground  area of the  Premises  which  is  taken  or
         condemned.  CROET shall be entitled to receive  that portion of any and
         all awards  necessary  to  compensate  it for the present  value of the
         rents  which it would have  received  in the future and for the present
         value of its reversionary interest, and notwithstanding the termination
         of this  Sublease,  Sublessee  shall be entitled to that portion of any
         and  all  awards  necessary  to  compensate  it for  the  value  of its
         improvements to the Premises, the value of its leasehold estate and the
         damages  which  it may  sustain  as a  result  of  termination  of this
         Sublease prior to the end of the Sublease  term,  including any renewal
         terms.

13.      LANDLORD'S  ACCESS TO  PREMISES.  Notwithstanding anything to the 
         -------------------------------
         contrary in this Sublease,  entry to the Premises by CROET will only be
         permitted when accompanied by Sublessee's  authorized escort, except as
         hereinafter provided. It is recognized by both CROET and Sublessee that
         Sublessee will be performing research on, and manufacturing,  drugs for
         human   consumption   under   regulations  and  licenses  from  various
         governmental agencies,  including, without limitation, the Federal Drug
         Administration  ("FDA").  Sublessee is responsible to such governmental
         agencies,  including,  without limitation, the FDA, for compliance with
         all applicable  laws,  rules,  regulations  and  ordinances  (including
         protection of materials in work areas from unauthorized  alterations or
         access),  whose  object it is to protect  the public  from  adulterated
         contaminated  or  otherwise   uncontrolled   and  potentially   harmful
         products. CROET acknowledges it is not competent to judge the impact of
         its entry of the Premises on the relationship between Sublessee and the
         applicable regulatory authorities and potential impact on public health
         and safety.

         CROET hereby agrees,  except as hereinafter  expressly  provided,  that
         CROET shall provide  Sublessee with one (1) business day advance notice
         of any desire by CROET, or its authorized  agents or  representative to
         enter the  Premises.  All  entries on the  Premises  must  comply  with
         applicable laws, rules, regulations and ordinances (collectively called
         the  "Regulations").  Upon request,  Sublessee  will provide CROET with
         necessary information  concerning the Regulations.  Except as expressly
         hereinafter  provided,  all  entries  shall  be  with  an  escort  from
         Sublessee or its representatives and shall be subject to all reasonable
         safety procedures and guidelines as may be prescribed by Sublessee.

         In the case of  emergencies,  CROET may enter the Premises  unannounced
         and  unescorted;  provided,  however,  CROET agrees to  cooperate  with
         Sublessee  in complying  with all  reporting  requirements  pursuant to
         applicable Regulations.

         It is further  recognized  by CROET and  Sublessee  that  Sublessee  is
         engaged in commerce utilizing proprietary and confidential information,
         processes  and  procedures.  CROET  agrees that any  written  materials
         located on or in the Premises  obtained during any inspection or access
         to the  Premises  by  CROET  (or its  agents  or  employees)  shall  be
         confidential  except for written  materials  delivered to CROET, or its
         agents or employees, by Sublessee or its employees;  provided, however,
         this shall not affect CROET's  ability to obtain  information to assess
         Sublessee's  compliance  with the terms and conditions of this Sublease
         with respect to  Sublessee's  use,  operation  and  maintenance  of the
         Premises,  and further provided that CROET may divulge such information
         to its agents, employees,  contractors,  attorneys, prospective lenders
         and purchasers and to DOE.

14. OPTION TO SUBLEASE ADJOINING LAND AND RIGHT OF FIRST REFUSAL.

   (a)            During the Option Period (as defined in paragraph  14(b)),  
                  CROET hereby grants unto Sublessee the  non-exclusive right 
                  and option to  sublease  the  remainder  of Site 3 of  Parcel 
                  ED-1  (containing  approximately  [Confidential  Treatment
                  Requested]  acres) and identified as the  "Adjoining Property"
                  on Appendix "A"  attached  hereto (the  "Adjoining Property"),
                  on the  same  terms  and  conditions  as  contained  in this  
                  Sublease  (with  the land  rental  being $ [Confidential  
                  Treatment  Requested]  per acre per year, as adjusted by the 
                  Consumer Price Index every five (5) years from the date of 
                  this  Sublease) for the remaining  term set forth in this  
                  Sublease.  Sublessee  shall give CROET no less than thirty 
                  (30) days  advance  written  notice of the  exercise of this  
                  option.  This option  shall  terminate simultaneously  with 
                  the right of first refusal set forth below. If said first 
                  refusal right is triggered,  the terms of the first refusal 
                  right shall control in lieu of the non-exclusive option terms 
                  hereinbefore set forth provided a sublease of the Adjoining  
                  Property is consummated  to the third-party offeree or to 
                  Sublessee  under the following paragraph.

                  In the event CROET receives a bona fide written offer from any
                  third party to sublet the  Adjoining  Property (or any portion
                  thereof  or any tract of which  the  Adjoining  Property  is a
                  part)  during the Option  Period,  CROET has  granted and does
                  hereby  grant the  right,  on a right of first  refusal  basis
                  described  hereinafter,   to  Sublessee,  its  successors  and
                  assigns,  at the election of Sublessee  or its  successors  or
                  assigns,  to sublet the Adjoining Property at the price and on
                  the terms and conditions contained in the written offer except
                  the term of any sublease  shall not extend  beyond the term of
                  this Sublease and further  except for the time within which to
                  close the transaction. CROET shall give notice to Sublessee of
                  the written offer,  including  delivery to Sublessee of a true
                  and exact  copy of the  written  offer,  and  allow  Sublessee
                  thirty (30)  calendar  days  subsequent  to the notice  within
                  which  Sublessee may elect to sublet from CROET.  In the event
                  Sublessee  so  elects  to  sublet  by  giving  notice  of such
                  election to CROET  within the thirty  (30) day  period,  CROET
                  shall sublet the Adjoining  Property to Sublessee at the price
                  and on the same terms and  conditions  as are contained in the
                  written offer,  except that (i) Sublessee shall also reimburse
                  CROET for its reasonable  marketing  expenses  incurred in its
                  effort to sublease  the  Premises  to the third party  offeree
                  which  triggered  this  right of first  refusal,  and (ii) the
                  closing of the  transaction  shall be held  within  sixty (60)
                  calendar days following the expiration of the aforesaid 30-day
                  period.  Should Sublessee by written notice to CROET elect not
                  to exercise  the right to sublet or should  Sublessee  fail to
                  notify  CROET of its election to sublet  within the  aforesaid
                  30-day  period,  then in either of such events  CROET shall be
                  free to consummate  the sublease of the Adjoining  Property to
                  the third party  submitting the written  offer,  provided that
                  the  sublease  is closed  and on the same  material  terms and
                  conditions as are contained in the written offer,  without any
                  substantive  modification  thereto,  except  that the  closing
                  thereof  may  occur on or  before  the  thirtieth  (30th)  day
                  subsequent  to the closing  deadline  set forth in the written
                  offer.   Should  any  such  sublease  not  be  consummated  as
                  aforesaid,  CROET  shall,  in  the  event  CROET  subsequently
                  receives any modified or new bona fide written  offer from any
                  third party to sublet the Adjoining Property, again follow the
                  provisions of this paragraph 14 requiring  notice to Sublessee
                  and   opportunity   for  Sublessee  to  sublet  the  Adjoining
                  Property.  No restriction  on CROET's  ability to sublease the
                  Adjoining Property shall apply to any period subsequent to the
                  Option Period. CROET shall not be obligated to offer to sublet
                  the  Adjoining  Property,  and CROET shall not be obligated to
                  disclose  to  Sublessee  any  offer to  sublet  the  Adjoining
                  Property which CROET receives which CROET,  in its discretion,
                  does  not  intend  to  accept.  The  aforesaid  right of first
                  refusal  in  favor  of  Sublessee  is a  material  part of the
                  consideration for this Sublease and shall and does hereby vest
                  in  Sublessee,   its  successors  and  assigns,   immediately.
                  Sublessee  may not  exercise  its right to sublet  pursuant to
                  this  paragraph  14 if at the time of the  attempted  exercise
                  Sublessee is in default (for which any applicable  cure period
                  has expired without cure) under the terms of this Sublease.

   (b)            The non-exclusive option and right of first refusal set forth
                  in paragraph  14(a) shall be in effect,  at no additional cost
                  or charge to Sublessee,  from the date of this Sublease  until
                  January 1, 2002,  as may be  extended by mutual  agreement  of
                  CROET and Sublessee for such  consideration as mutually agreed
                  by said parties. This three-year period, as may be extended as
                  aforesaid, is herein called the "Option Period."

   (c)            In the event the Sublessee exercises the option granted 
                  herein,  or  successfully  invokes its right of first refusal 
                  granted herein,  CROET may terminate  the rights so granted or
                  invoked and all rights with respect to the Adjoining  Property
                  shall revert to CROET and this Sublease  shall be terminated  
                  solely as to the Adjoining  Property  unless (i) within
                  ninety (90) days from the date of the  exercise of the option 
                  or  successful  invoking of the right of first  refusal
                  the Sublessee agrees to engage an  architectural and 
                  engineering firm to design a facility to be constructed on the
                  Adjoining Property that is consistent with the permitted uses 
                  of the Adjoining  Property,  and (ii) the employment on
                  the Premises and the Adjoining Property,  in the aggregate,  
                  \shall be at least [Confidential  Treatment Requested] of
                  the employment  figures described in paragraph 6 herein,  and 
                  (iii) the Sublessee uses reasonable efforts to complete
                  the  facility on the  Adjoining Property on or before one year
                  after the  exercising  of the option or  successfully
                  invoking its right of first  refusal.  This right of CROET to 
                  terminate  the  Sublessee's  rights and interest in the
                  Adjoining  Property shall be given to the Sublessee by written
                  notice thirty (30) days prior to termination,  and the
                  termination  shall not take effect if the Sublessee promptly 
                  commences to develop the  Adjoining  Property  within
                  thirty (30) days of receiving this notice.

15.      LEASEHOLD  MORTGAGES/DEEDS  OF TRUST.  Sublessee  is hereby  given the 
         ------------------------------------
         right by CROET in addition to any other rights herein granted,  without
         CROET's prior written consent, to mortgage,  or to grant deeds of trust
         in and to  (collectively  "mortgage"),  Sublessee's  interests  in this
         Sublease,  and assign  this  Sublease as  security  for a Mortgage  (as
         hereinafter  defined) upon the condition that all rights acquired under
         such  Mortgage  shall be  subject to all of the  terms,  covenants  and
         conditions of this  Sublease,  and to all rights and interests of CROET
         herein,  none of which terms,  covenants or  conditions  is or shall be
         waived  by CROET by  reason  of the  right  given so to  mortgage  such
         interest in this  Sublease,  except as expressly  provided  herein.  If
         Sublessee  (including,  but not limited to, any sublessee of Sublessee,
         but only with Sublessee's prior consent) shall mortgage this leasehold,
         or any part or parts  thereof,  and if the  Mortgagee  (as  hereinafter
         defined)  shall  send to CROET a true  copy  thereof,  together  with a
         notice  specifying  the  name  and  address  of the  Mortgagee  and the
         pertinent  recording date with respect to such  Mortgage,  CROET agrees
         that as long as any such Mortgage shall remain unsatisfied of record or
         until a notice of satisfaction is given by the Mortgagee to CROET,  the
         following provisions shall apply:
        (i)       There shall be no  cancellation,  surrender or modification of
                  this Sublease by joint action of CROET and  Sublessee  without
                  the prior consent of the Mortgagee;
        (ii)      CROET  shall,  upon  serving  Sublessee  with  any  notice  of
                  default,  simultaneously  serve a copy of such notice upon the
                  Mortgagee. The Mortgagee shall thereupon have the same period,
                  after service of such notice upon it, to remedy or cause to be
                  remedied  the defaults  complained  of, and CROET shall accept
                  such performance by or at the instigation of such Mortgagee as
                  if the same had been done by Sublessee.  Mortgagee  shall give
                  notice to CROET in the  event  Mortgagee  elects to  undertake
                  remedial action which involves Mortgagee taking possession and
                  control of the Premises  and/or the PSP to cure any default by
                  Sublessee under this Sublease.
        (iii)     CROET  agrees  that in the  event of the  termination  of this
                  Sublease by reason of any default by Sublessee  other than for
                  nonpayment of basic rent,  CROET will, upon written request of
                  Mortgagee,  enter into a new sublease of the Premises with the
                  Mortgagee or its  nominee(s),  for the  remainder of the term,
                  effective  as of the  date of such  termination,  at the  same
                  basic rent and upon the terms,  covenants  and  conditions  as
                  herein  contained  and subject only to the same  conditions of
                  title  as  this  Sublease  is  subject  to on the  date of the
                  execution  hereof,  and to the rights,  if any, of any parties
                  then in possession of any part of the Premises, provided:

                  (A)      The  Mortgagee  or its  nominee  shall give notice to
                           CROET for such new sublease  within  thirty (30) days
                           after the date of such  termination  and such  notice
                           shall be  accompanied by payment to CROET of all sums
                           then due to CROET and not paid by Sublessee  pursuant
                           to this Sublease;

                  (B)      The  Mortgagee  or its nominee  shall pay to CROET at
                           the time of the  execution  and  delivery of such new
                           sublease,   any   expenses,    including   reasonable
                           attorneys'  fees,  to which  CROET  shall  have  been
                           subjected by reason of such default;

                  (C)      The  Mortgagee  or  its  nominee  shall  perform  and
                           observe all covenants herein contained on Sublessee's
                           part to be  performed  and shall  further  remedy any
                           other  conditions  which  Sublessee  pursuant  to the
                           terminated  Sublease was  obligated to perform  under
                           the terms of this  Sublease;  and upon  execution and
                           delivery of such new sublease,  any  subleases  which
                           may have theretofore been assigned and transferred by
                           Sublessee to CROET,  as security under this Sublease,
                           shall  thereupon  be  deemed  to be held by  CROET as
                           security   for   the   performance   of  all  of  the
                           obligations of Sublessee pursuant to the new lease;

                  (D)      Such new sublease  shall be expressly made subject to
                           the  rights,  if any,  of  Sublessee  pursuant to the
                           terminated sublease;

                  (E)      The Sublessee  under such new sublease shall have the
                           same  right,   title  and  interest  in  and  to  the
                           buildings  and   improvements   on  the  Premises  as
                           Sublessee had under the terminated sublease;
         (iv)     The  Mortgagee  shall  be  given  notice  of any  judicial  or
                  administrative  proceedings by the parties hereto  regarding a
                  default  of  this  Sublease,  and  shall  have  the  right  to
                  intervene therein and be made party to such  proceedings,  and
                  the parties hereto do hereby consent to such intervention.  In
                  the event that the  Mortgagee  shall not elect to intervene or
                  become  a  party  to such  proceedings,  the  Mortgagee  shall
                  receive notice of, and a copy of any award or decision made in
                  said proceedings; and


         (v)      CROET shall, upon request, execute, acknowledge and deliver to
                  each  Mortgagee,  an  agreement  prepared at the sole cost and
                  expense of Sublessee,  in form reasonably satisfactory to such
                  Mortgagee, between CROET, Sublessee and Mortgagee, agreeing to
                  all of the  provisions of this section.  The term  "Mortgage,"
                  whenever  used  herein,   shall  include   whatever   security
                  instruments  are used in the locale of the Premises,  such as,
                  without  limitation,   deeds  of  trust,  security  deeds  and
                  conditional deeds, as well as financing  statements,  security
                  agreements and other  documentation  required  pursuant to the
                  Uniform  Commercial Code. The term "Mortgagee"  shall mean the
                  holder or beneficiary of any Mortgage.  The provisions of this
                  section shall survive any termination of this Sublease.

16.      TERMINATION RIGHTS OF SUBLESSEE.  The Sublessee shall have the right to
         terminate  this Sublease in the event any of the  following  conditions
         occurs, in Sublessee's sole discretion:

         (i)      The physical  condition of Property not satisfactory to 
                  Sublessee,  or the lenders which Sublessee selects to extend 
                  financing of the  Facility or  equipment  to be used on the 
                  Premises  ("Sublessee's  Lender").  The  physical  condition 
                  of the Premises shall include, without limitation, the status 
                  of title and any industrial park  covenants,  restrictions,
                  conditions and easements to be hereafter placed upon Parcel 
                  ED-1, geological,  archeological,  environmental,  survey
                  and other developmental  matters,  federally-designated  
                  wetlands areas,  federally-designated  flood plain areas. In
                  the event  Sublessee  does not notify CROET of its intention 
                  to terminate this Sublease for failure of this condition
                  to be  satisfied  on or before  one (1) year from the date of 
                  this  Sublease,  this  condition  shall be deemed to be
                  waived or satisfied by Sublessee.

        (ii)      The Lease and the  Sublease  are not  approved by  Sublessee's
                  Lender.  In the event  Sublessee  does not notify CROET of its
                  intention  to  terminate  this  Sublease  for  failure of this
                  condition  to be  satisfied on or before one (1) year from the
                  date of this Sublease,  this  condition  shall be deemed to be
                  waived or satisfied by Sublessee.

       (iii)      Sublessee  fails to obtain all the required  governmental  and
                  regulatory authority, licenses, permits, approval and consents
                  for the  development,  use and operation of the Facility,  the
                  PSP and any other  equipment  required  for use in  connection
                  with Sublessee's business operations on the Premises.

        (iv)      Sublessee  fails  to  receive  state  and  local  governmental
                  incentives  and  inducements   satisfactory  to  Sublessee  in
                  connection  with the  development,  use and  operation  of the
                  Facility, including the PSP and any other equipment to be used
                  on the Premises (including, without limitation, ad valorem tax
                  relief/abatement    from   county   and   city    governmental
                  authorities).  Sublessee agrees to use reasonable diligence in
                  the filing  and  pursuit of all  governmental  incentives  and
                  inducements  required  or desired by  Sublessee.  In the event
                  that  Sublessee  does not  notify  CROET of its  intention  to
                  terminate  this  Sublease for failure of this  condition to be
                  satisfied on or before January 1, 2000,  this condition  shall
                  be deemed to be waived or satisfied by Sublessee.

         (v)       DOE or CROET  fails to grant  any  consents  or  approval  to
                   Sublease to Sublessee, required to be obtained by Sublessee
                  pursuant  to  the  Land  Lease  or  this  Sublease,  which  is
                  reasonably  necessary  for  Sublessee's  enjoyment,   use  and
                  operation of the Facility, the PSP, and any other equipment to
                  be utilized by Sublessee on the Premises.

         (vi)     DOE fails to enter into a written  agreement  satisfactory  to
                  Sublessee and Sublessee's  Lender on or before April 30, 1999,
                  which  provide that in the event there is a default  under the
                  Land Lease not resulting from  Sublessee's  default under this
                  Sublease,  in the  event  the Land  Lease is  terminated,  the
                  Sublease shall become a direct lease between DOE and Sublessee
                  subject to all terms of this  Sublease and the  provisions  of
                  the Land Lease  applicable  to the  Premises and DOE shall not
                  disturb any rights, interests or privileges of Sublessee under
                  the  Sublease  provided  Sublessee is in  compliance  with the
                  terms thereof.

         (vii)    DOE  terminates  the  Equipment  Lease  pursuant  to Section 3
                  thereof  in  the  event  of a  national  emergency  or in  the
                  interest of national defense,  or if the PSP is taken by power
                  of eminent domain.

        (viii)    Sublessee  determines,  as a result of a detailed inventory of
                  the PSP  components  after  the  date  hereof,  that  critical
                  components of the PSP are missing, damaged or inoperable to an
                  extent that, in  Sublessee's  business  judgment,  it would be
                  impractical to repair or replace them.

          (ix)    The DOE does not release all  existing  components  of the PSP
                  for  delivery to Sublessee  within  thirty (30) days after the
                  Facility is ready to receive the same, provided that Sublessee
                  shall have used  reasonable  efforts to agree with DOE on, and
                  to  implement,  an  appropriate  security plan so that DOE can
                  release the PSP for delivery.

           (x)    DOE's M&O contractor  fails to deliver the same to Sublessee's
                  facility  within  thirty (30) days after the Facility is ready
                  to receive the same; provided,  that Sublessee shall not be in
                  breach of the Work for Others Agreement  between Sublessee and
                  the  M&O  contractor  ("the  WFO  Agreement"),   and  provided
                  Sublessee shall have given the M&O contractor adequate advance
                  notice (at least  thirty [30] days) of the  proposed  delivery
                  date.

          (xi)    The  PSP  or  critical  components  thereof  fail  operational
                  testing and, in  Sublessee's  business  judgment,  it would be
                  impractical to repair or replace them.

         (xii)    Sublessee  determines  that  production of enriched  palladium
                  isotopes  using the PSP is not, or is no longer,  economically
                  feasible in light of then-current market conditions.

        (xiii)    The DOE's High Flux Isotope  Reactor is shut down  permanently
                  or indefinitely,  or Sublessee is not permitted  [Confidential
                  Treatment  Requested]  as  presently  contemplated  by the WFO
                  Agreement,  or if  Sublessee  is no longer given access to the
                  HFIR for isotope irradiation as presently  contemplated by the
                  WFO Agreement.

         In the event Sublessee elects to terminate this Sublease for failure of
         any of the foregoing conditions to be satisfied, Sublessee shall notify
         CROET in writing of such  election,  in which event this Sublease shall
         terminate on the date  designated  by  Sublessee,  but in no event more
         than thirty (30) days from the date of such notice.

         Furthermore,  Sublessee  shall  have the right to  terminate  by giving
         ninety  (90)  days'  notice  to CROET if CROET  fails to  substantially
         perform  or  comply  with any of its  obligations  under  the terms and
         conditions of this Sublease and continues and persists  therein for ten
         (10) days after  notice  thereof in  writing  by  Sublessee;  provided,
         however,  if such default is not reasonably capable of cure within such
         ten (10) day period,  Sublessee shall not be entitled to terminate this
         Sublease  if  CROET  promptly  undertakes  to  cure  such  default  and
         diligently pursues such cure.

         In addition,  Sublessee shall have the right to terminate this Sublease
         only as it relates to the PSP and the Equipment Lease,  with or without
         cause, on ninety (90) days' prior written notice to CROET.

         In the event of the termination of this Sublease (or the portion hereof
         relating  to the PSP) as  aforesaid,  this  Sublease  (or such  portion
         relating to the PSP) shall be of no further  force and effect,  and the
         parties  hereto shall have no further  rights,  obligations  and duties
         hereunder except that nothing  provided herein shall relieve  Sublessee
         of  the  restoration  obligations  set  forth  paragraph  3(d)  of  the
         Sublease.

17.      SUBLESSEE'S ENTRY ON PREMISES.  From and after the date of Sublease and
         ------------------------------
         prior to the  commencement of the term of this Sublease as set forth in
         Paragraph 2(a), CROET grants to Sublessee and its authorized agents and
         representatives,  the right to enter onto the  Premises  to conduct any
         surveys,  tests, analyses,  investigations,  inspections and studies as
         Sublessee may elect to determine  the  feasibility  of the  development
         contemplated by Sublessee upon the Premises. Sublessee shall indemnify,
         and hold CROET harmless from any losses, costs,  damages,  expenses and
         actions arising out of said activities of Sublessee.

18.      CROET'S OBLIGATIONS FOR COMMON AREA FACILITIES;  EASEMENTS.  CROET 
         ----------------------------------------------------------
         intends to develop the approximately  957.16 acres which it leases from
         DOE  pursuant  to Land Lease (the  "Industrial  Park  Property")  as an
         integrated  industrial  park.  In  connection  therewith,  CROET hereby
         covenants  and  agrees  to  construct  and  maintain,  or  cause  to be
         constructed  and  maintained,   all  facilities  commonly-used  by  the
         occupants of the Industrial  Park Property  (collectively,  the "Common
         Area Facilities"), including, without limitation, all roads and streets
         (which are not publicly  dedicated),  all commonly  used utility  lines
         (which are not public lines or lines of other  privately-owned  utility
         companies)  and  detention/retention  areas.  CROET  agrees to complete
         construction  of all Common Area  Facilities  necessary for Sublessee's
         use of the  Facility  on or  before  one (1) year from the date of this
         Sublease.  In the event CROET fails to construct or maintain the Common
         Area  Facilities  as  aforesaid,  thirty  (30) days after  notice  from
         Sublessee (except for emergency repairs),  Sublessee may (but shall not
         be obligated to) undertake such construction  and/or  maintenance.  Any
         amounts  expended by Sublessee  shall be immediately due and payable to
         Sublessee  and shall bear interest from the date advanced at the lesser
         of twelve  percent (12%) per annum or the maximum  amount  permitted by
         law. Sublessee shall also have the right to offset rents due under this
         Sublease for any such amounts owed Sublessee

         CROET hereby grants unto  Sublessee,  during the term of this Sublease,
         the following non-exclusive easements:

         (i)      an  ingress-egress  easement  60-feet in width for purposes of
                  ingress and egress from State Route 95 (bordering  the eastern
                  side of the  Industrial  Park Property) over such private road
                  as shall border the northern boundary of the Premises;

         (ii)     an easement for utilities (including, without limitation, gas,
                  water, electricity,  sanitary, sewer and telephone) across the
                  Industrial  Park  Property to the  boundary of the Premises at
                  such  locations  as may be  mutually  approved  by  CROET  and
                  Sublessee, such approval not to be unreasonably withheld; and

         (iii)    an easement  for  drainage of surface  storm water  across the
                  Industrial  Park Property from the Premises at such  locations
                  as may be  mutually  approved  by CROET  and  Sublessee,  such
                  approval not to be unreasonably withheld.

19.      PARAMETERS  OF LAND USE.  In  accordance  with  Condition  No. 7 of the
         ------------------------
         Land Lease, the Sublessee shall be subject to the following  parameters
         addressed within the approved environmental documentation or subsequent
         documentation which expands those parameters:

         The Environmental  Assessment  (DOE/EA-113) ("EA") issued in April 1996
         by the U.S.  Department of Energy's Oak Ridge Operations Office for the
         lease of parcel ED-1 of the Oak Ridge Reservation by the East Tennessee
         Economic Council, now CROET,  provides in subsection 2.1.3,  Industrial
         Development, that industrial use of the parcel will conform to the City
         of Oak Ridge Zoning Ordinance (Chapter 7, Sect. 6-713 IND-2, Industrial
         District),  except for certain uses not relevant to this Sublease.  The
         ordinance  referenced  is  included  as  Appendix  C to the EA,  and it
         provides in subsection  6-713(a)(l)  that  permitted  principal uses of
         industrial  districts  include,  among other  things,  "light and heavy
         manufacturing   and  processing   plants,   research  and   development
         facilities, and facilities such as processing of radioisotopes."

20.      PSP USAGE FOR NON-MEDICAL ISOTOPES. If the Sublessee desires to use the
         ----------------------------------
         PSP to produce  isotopes which are not either  [Confidential  Treatment
         Requested]  notify  DOE in writing  so that DOE can  determine  whether
         those  isotopes are  recognized by the EA covering the Premises and, if
         not so recognized,  so that DOE can process an appropriate  addendum to
         the EA, the cost of such addendum to the EA being borne by Sublessee.

21.      AMENDMENTS  TO LEASES.  CROET  covenants  and agrees  that it shall not
         ----------------------
         consent not to be  unreasonably  withheld (i) the Equipment  Lease,  or
         (ii) the Land Lease as it affects the  Premises  or the use,  enjoyment
         and operation thereof.

22.      MISCELLANEOUS.
         -------------

        (a)       CROET and  Sublessee  each warrant and  represent to the other
                  that such party has not  engaged  services  of any real estate
                  broker,  agent or finder  which  would  entitle  any person or
                  entity  to any  fee,  commission,  or  other  compensation  in
                  connection  with this  Sublease.  CROET and  Sublessee  hereby
                  agree  to  indemnify  and  hold the  other  harmless  from and
                  against  any and  all  claims,  fees,  commissions,  or  other
                  compensation  of any real  estate  broker,  agent,  or  finder
                  claiming  services to have been  rendered  for or on behalf of
                  such party in connection with the execution of this Sublease.

         (b)      At any time and from time to time upon the  request  of either
                  of the  parties  hereto or any  mortgage  lender of Sublessee,
                  CROET and Sublessee,  as the case may be, shall deliver to the
                  party  requesting  the same a certificate  stating (i)
                  whether or not this  Sublease is in full force and effect,  
                  (ii)  whether or not any rights to renew the term of this
                  Sublease have been exercised and the date on which this 
                  Sublease will  terminate,  (iii) whether or not this Sublease
                  has been modified or amended in any way and attach any copy of
                  such  modification  or amendment,  (iv) whether or not
                  there are any existing  defaults  under this Sublease to the 
                  knowledge of the party  executing the  certificate,  and
                  specifying the nature of such defaults, if any, (v) the status
                  of rent payments,  and (vi) any of the facts regarding
                  the Sublease which any mortgage lender of Sublessee may 
                  reasonably request.

(c)               This   Sublease   shall  be  governed  by,  and  construed  in
                  accordance  with,  the laws of the State of Tennessee,  except
                  that if  interpretation  or  application  of provisions of the
                  Leases  are  involved,  the  provisions  of the  Leases  shall
                  control.

(d)               This  Sublease  shall be binding  upon and shall  inure to the
                  benefit of CROET and Sublessee and their respective successors
                  and assigns.

23.      ENTIRE LEASE. This Sublease contains the entire  understanding of CROET
         and the  Sublessee  with respect to its subject  matter.  This Sublease
         reflects all agreements and  commitments  made prior to the date hereof
         with respect to this Sublease by CROET and the Sublessee.  There are no
         other oral or written understandings, terms, or conditions, and neither
         CROET nor the Lessee has relied upon any  representation  or statement,
         express or implied, which is not contained in this Sublease.

         IN WITNESS  WHEREOF,  the  parties  have  caused  this  Sublease  to be
executed on their behalf by their duly authorized representatives as of the date
first written above.

                                     CROET:
                                     COMMUNITY REUSE ORGANIZATION
                                     OF EAST TENNESSEE


                                      BY:/s/ Lawrence T. Young                 
                                         -----------------------------
                                         Print Name: Lawrence T. Young          
                                         -----------------------------
                                         Title: President and CEO              
                                         -----------------------------


                    [SIGNATURES CONTINUED ON FOLLOWING PAGE]


<PAGE>



                    [SIGNATURES CONTINUED FROM PREVIOUS PAGE]


                                             SUBLESSEE:

                                             THERAGENICS CORPORATION
ATTEST:

/s/ Jaquelyn L. Burtle                  BY:   /s/ Bruce W. Smith              
- ------------------------------               --------------------------
Print Name:Jacquelyn L. Burtle          Print Name: Bruce W.  Smith            
Title: Corporate Librarian              Title: Executive V. P. and CFO       





<PAGE>


                                   APPENDIX A

                   DRAWING OF PREMISES AND ADJOINING PROPERTY
                   ------------------------------------------







                    Work for Others Agreement No. ERD-99-1731

                                     Between

                   LOCKHEED MARTIN ENERGY RESEARCH CORPORATION

           Operating Under Prime Contract No.DE-ACO5-96OR22464 for the
                           U. S. Department of Energy

                                       And

                             Theragenics Corporation

The  obligations  of the  above-identified  DOE  Contractor  shall  apply to any
successor in interest to said  Contractor  continuing  the  operation of the DOE
facility involved in this Work for Others Agreement.

Article I.  PARTIES TO THE AGREEMENT

The U. S.  Department of Energy  Contractor,  LOCKHEED  MARTIN  ENERGY  RESEARCH
CORPORATION  (hereinafter referred to as the "Contractor") has been requested by
Theragenics  Corporation  (hereinafter  referred to as the "Sponsor") to perform
the work set forth in each Task  Order,  attached  hereto as  Appendix  A. It is
understood by the Parties that, except for the intellectual  property provisions
of this  Agreement,  the  Contractor  is  obligated to comply with the terms and
conditions of its M&O contract with the United  States  Government  (hereinafter
called the  "Government")  represented by the United States Department of Energy
(hereinafter  called the "Department" or "DOE") when providing goods,  services,
products,  processes,  materials,  or  information  to the  Sponsor  under  this
Agreement.

Article II.  TERM OF THE AGREEMENT: MULTIPLE TASK ORDERS: ADMINISTRATION 
             ------------------------------------------------------------
             (DEVIATION)
             -----------

A.     The estimated period of performance will be set forth in each Task Order.
       The term of this  Agreement  shall be  effective as of the latter date of
       (1) the date on which it is signed by the last of the Parties thereto, or
       (2) the date on which it is approved by DOE.

B.     This is a master Work for Others Agreement that contemplates the issuance
       of an indefinite  number of Task Orders  pursuant to Attachment 1,  
       Statement of Work to the Agreement.  The  individual  Task Orders are set
       forth in Appendix A and approved by DOE. The  Contractor has further  
       agreed to enter into  additional  Task Orders  consistent  with the terms
       of the Statement of Work including the estimated  costs  therein,  if and
       when so requested by Sponsor,  provided that Sponsor's  options to enter 
       into these additional  Statement of Work will expire if not  exercised by
       written  notice to  Contractor  on or before  [Confidential  Treatment
       Requested].  It is the intention of the Parties to extend the  Agreement 
       throughout  the operating  life of the High Flux Isotope  Reactor and the
       Contractor  has initiated  the  procedure for obtaining  approval of
       such an extension.  Contractor  acknowledges  that Sponsor is investing 
       in the initial Task Order as well as other  initiatives  based on 
       Contractor's  commitment to perform the additional Task Orders specified 
       above as well, and Contractor  agrees that it shall perform these 
       additional Task Orders,  subject to the terms of this Agreement,  if 
       requested by  Sponsor,[Confidential  Treatment Requested] is incompatible
       with the DOE's mission or [Confidential Treatment Requested].

C.     The  Contractor  shall use its best efforts to provide the services under
       each Task Order as described therein.

D.     The Principal  Investigator(s)  and other key personnel to be assigned to
       each Task Order shall be specified in each Task Order, and shall,  except
       in case of events such as illness, resignation, other employment actions,
       conflicts of interest or if DOE determines that such personnel are needed
       to perform DOE mission or programmatic requirements,  be available to the
       specific  projects  listed in the Task  Order.  If any of such  personnel
       become unavailable as stated above,  Contractor will use its best efforts
       to  replace   them   promptly   with  other   personnel   of   comparable
       qualifications.

E      In addition to the work to be performed under the Task Orders, in 
       accordance  with DOE Order 481.1,  this Agreement  provides  for  access 
       to highly  specialized  or unique  DOE  facilities,  that is, the High 
       Flux Isotope  Reactor  ("HFIR") as follows.  Neither LMER nor DOE is 
       obligated  hereunder to maintain the HFIR in operation  or to keep it  
       operating  any  specified  percentage  of the time, but as long as the 
       HFIR is in operation and Sponsor has a continuing  need for its use,  
       Sponsor shall have the following  access  rights: (1)  [Confidential  
       Treatment  Requested]  (2) Sponsor shall have the exclusive right to  
       [Confidential Treatment  Requested] to irradiate  material, which right 
       will be exercised  through  Contractor under this Agreement,  as 
       contemplated  by  the  Statement  of  Work.  DOE  may,  however,   
       [Confidential  Treatment Requested],  on  terms to be  mutually  agreed, 
       for [Confidential Treatment Requested],  including  production  of
       isotopes for sale as long as the isotope is not  competitive  with the 
       Sponsor's  mission.  (3) Sponsor will be required to pay for irradiation 
       of target  material  [Confidential  Treatment  Requested] in accordance
       with DOE Accounting Policy. (4) Sponsor may [Confidential  Treatment  
       Requested] to irradiate  palladium for research or for medical or 
       commercial use for its own account or for sale to third  parties, subject
       to all applicable  laws and  regulations  governing the  production of 
       isotopes;  and (5)  [Confidential  Treatment Requested].


Article III.  COSTS (DEVIATION)
              -----------------

A.    The estimated cost for the work to be performed  under this Agreement will
      be set forth in each Task Order.

B.    The  Contractor  has no obligation to continue or complete  performance of
      the work on any Task Order issued  pursuant to this agreement at a cost in
      excess of the estimated cost, including any subsequent amendment set forth
      in each Task Order, except as provided in paragraph C below.

C.    The  Contractor agrees to provide at least 30 days' notice to the Sponsor 
      if the actual cost to complete performance will exceed the estimated cost 
      set forth in each Task Order.  If so requested by the Sponsor, the 
      Contractor  will  provide  its  best  estimate  of the  additional  cost, 
      and of the time  needed,  for completion,  or for  completion to the next 
      milestone in the Task Order,  if  applicable.  If upon receipt of
      this  information  Sponsor  elects to  continue  funding  the  effort, 
      the Task  Order  shall be  amended to appropriately  increase the budget 
      for the project and, if  applicable,  to extend the milestone  dates,  and
      the  Contractor  shall  continue  the work so long as Sponsor provides the
      needed  additional  funding in accordance  with the  principles of Article
      IV. Nothing  shall,  however,  require the Contractor to continue
      work if the  Contractor  concludes  in good  faith  that the  objective  
      of the work  will not be  reasonably attainable.

Article IV.  FUNDING AND PAYMENT (DEVIATION)
             --------------------------------

A.     The Sponsor shall provide  sufficient  funds in advance to reimburse the 
       Contractor for costs to be incurred in  performance of the work described
       in this  Agreement,  and the  Contractor  shall have no obligation to
       perform in the absence of adequate  advance funds.  If the estimated  
       period of performance for a given Task Order  exceeds  90  days  or  the
       estimated  cost  exceeds   $25,000,   the  Sponsor  may,   advance  funds
       incrementally.  In such a case, the Contractor  will initially  invoice 
       the Sponsor in an amount  sufficient to permit the work to proceed for 
       ninety  (90) days and  thereafter invoice the Sponsor  monthly so as to
       maintain  approximately  a 90-day  period that is funded in advance.  
       Payment  shall be made directly to the Contractor as specified in 
       Appendix A. Upon  termination or  completion,  any excess funds shall be 
       refunded by the Contractor to the Sponsor.

B.     The Contractor shall maintain such records as are normally maintained for
       DOE-supported work. The records of the Contractor shall not be subject to
       audit by the Sponsor;  however,  the Contractor shall make available upon
       request of the Sponsor,  where  reasonably  necessary  for the Sponsor to
       evaluate its expenditures or where otherwise considered appropriate, cost
       data and other  documents  concerning the services  performed  under this
       Agreement,   together  with  any  related  findings  and  all  reasonably
       necessary explanations or discussions.

Article V.  SOURCE OF FUNDS
            ---------------

The Sponsor  hereby  warrants and  represents  that, if the funding it brings to
this Agreement has been secured through other agreements,  such other agreements
do not have any terms and conditions  (including  intellectual  property)  which
conflict with the terms of this Agreement.

Article VI.  PROPERTY (DEVIATION)
             --------------------

Unless the  Parties  otherwise  agree in  writing,  all  equipment  produced  or
acquired with funds  provided by the Sponsor,  shall be delivered to the Sponsor
or otherwise disposed of as instructed by the Sponsor at the Sponsor's expense.

Article VII.  PUBLICATION MATTERS (DEVIATION)
              -------------------------------

The publishing  Party shall provide the other Party a sixty  (60)-day  period in
which to review and submit  comments  upon proposed  publications,  which either
disclose technical developments and/or research findings generated in the course
of this agreement, or identify or contain Proprietary Information (as defined in
paragraph  A.2 of  Article  XV).  The  publishing  Party  shall not  publish  or
otherwise disclose Proprietary Information identified by the other Party, except
as required by law or agreed to by both Parties.

Article VIII.  LEGAL NOTICE (DEVIATION)
               -------------------------

The  Parties  agree that the  following  legal  notice  shall be affixed to each
report  furnished to the Sponsor under this Agreement and to any report prepared
by Contractor under this Agreement which may be distributed by the Sponsor:

                               "DISCLAIMER NOTICE
                               ------------------

         This report was prepared by LOCKHEED MARTIN ENERGY RESEARCH CORPORATION
         (LMER) on behalf of the U. S. Department of Energy (DOE), as an account
         of work sponsored by  Theragenics  Corporation. Neither LMER,  DOE, the
         U. S.  Government,  or any person  acting on their behalf: (a) makes 
         any warranty or representation, express or implied, with respect to the
         information  contained in this report;  or (b) assumes any  liabilities
         with respect to the use of, or damages resulting from the use of any 
         information contained in the report"

Article IX.  DISCLAIMER; BEST EFFORTS (DEVIATION)
            -------------------------------------

THE GOVERNMENT AND THE CONTRACTOR MAKE NO EXPRESS OR IMPLIED  WARRANTY AS TO THE
CONDITIONS OF THE RESEARCH OR ANY INTELLECTUAL PROPERTY,  GENERATED INFORMATION,
OR  PRODUCT  MADE OR  DEVELOPED  UNDER THIS WORK FOR  OTHERS  AGREEMENT,  OR THE
OWNERSHIP,  MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE OF THE RESEARCH
OR RESULTING PRODUCT, THAT THE GOODS, SERVICES, MATERIALS,  PRODUCTS, PROCESSES,
INFORMATION,  OR DATA TO BE FURNISHED HEREUNDER WILL ACCOMPLISH INTENDED RESULTS
OR ARE SAFE FOR ANY PURPOSE INCLUDING THE INTENDED  PURPOSE,  OR THAT ANY OF THE
ABOVE WILL NOT  INTERFERE  WITH  PRIVATELY  OWNED RIGHTS OF OTHERS.  NEITHER THE
GOVERNMENT NOR THE  CONTRACTOR  SHALL BE LIABLE FOR SPECIAL,  CONSEQUENTIAL,  OR
INCIDENTAL   DAMAGES   ATTRIBUTED  TO  SUCH   RESEARCH  OR  RESULTING   PRODUCT,
INTELLECTUAL PROPERTY, GENERATED INFORMATION, OR PRODUCT MADE OR DELIVERED UNDER
THIS WORK FOR OTHERS AGREEMENT.

Subject to the foregoing,  Contractor  represents that Contractor shall,  within
sixty days after execution of this agreement,  use its best efforts to determine
whether  the  Contractor's  Office  of  Technology  Transfer  or  the  principal
investigators  named in the initial Task Orders have any actual  knowledge  that
any of the work to be done under this agreement,  or any of the goods, services,
materials,  products, processes,  information, or data to be furnished hereunder
as indicated in Attachment 1, the Statement of Work, will infringe or is claimed
to infringe,  any proprietary or intellectual  property rights of third parties.
As additional Task Orders are entered into  hereunder,  the Contractor will make
similar  inquiries of the  principal  investigators  named  therein as to actual
knowledge of infringement or claims of  infringement,  and will, if appropriate,
make additional  investigation  as to infringement  matters within the Office of
Technology  Transfer in light of the specific scopes of work agreed to for those
new Task  Orders.  If,  prior  to or  during  the  performance  of a task  order
Contractor  learns of any such  infringement  or claim thereof  relating to that
Task Order,  Contractor will promptly notify sponsor.  If during the term hereof
Sponsor raises specific  questions  related to possible claims of  infringement,
Contractor  will,  upon request,  use its best efforts to determine  what actual
knowledge  Contractor's  Office of Technology  Transfer or applicable  principal
investigators  have  that is  pertinent  to the  matter  in  question,  and will
disclose that pertinent information to Sponsor.

The  Contractor  shall use its best  reasonable  efforts to provide the services
under  each Task  Order as  described  therein.  Neither  the  Government,  DOE,
Contractor, nor persons acting on their behalf will be responsible, irrespective
of causes, for failure:

         (1) to perform the work,

         (2) provide the services, or

         (3) furnish the materials or information hereunder

at any  particular  time  or in any  specific  manner.  If at any  time  Sponsor
believes  that  Contractor  is not  using  its best  reasonable  efforts  in the
performance the work hereunder or is performing  contrary to this agreement or a
Task Order,  or if the Sponsor has any other problem with the performance of the
Contractor  hereunder,  Sponsor  shall be  entitled  to bring the problem to the
attention  of the  Assistant  Manager  for  Laboratories  of the DOE  Oak  Ridge
Operations  Office (the "Assistant  Manager").  The Assistant Manager shall hear
the matter  within a reasonable  time,  in a manner  deemed  appropriate  by the
Assistant  Manager,  and the Contractor  agrees to comply with any decision that
the Assistant Manager may, in his sole discretion,  issue to the Contractor with
respect to the matter. This right of Sponsor to present a matter for decision to
the Assistant  Manager is in addition to, and not in lieu of, Sponsor's right to
seek  alternate  dispute  resolution  under  Article XX, and any other rights of
Sponsor  under  this  agreement,   but  nothing  in  this  Article  creates  any
enforceable right against DOE.

Article X.  GENERAL INDEMNITY (DEVIATION)
           ------------------------------

The  Sponsor  agrees  to  indemnify  and  hold  harmless  the  Government,   the
Department,  the  Contractor  and  persons  acting  on  their  behalf  from  all
liability,  including costs and expenses incurred, to any person,  including the
Sponsor,  for injury to or death of persons or other living  things or injury to
or  destruction of property  arising out of the  performance of the Agreement by
the  Government,  the  Department,  the  Contractor,  or persons acting on their
behalf, or arising out of the use of the services performed, materials supplied,
or  information  given  hereunder  by any  person  including  the  Sponsor.  The
foregoing  indemnity shall not, however,  apply to liability  directly resulting
from the fault or negligence of the Government,  the Department, the Contractor,
or persons acting on their behalf.

Article XI.  PRODUCT LIABILITY INDEMNITY (DEVIATION)
             ---------------------------------------

Except for any liability resulting from any willful misconduct or negligent acts
or  omissions  of the  Government  or the  Contractor,  the  Sponsor  agrees  to
indemnify the Government and defend  Contractor  against any claim or proceeding
and pay all damages,  costs, and expenses,  including  attorney's fees,  arising
from  personal  injury or property  damage  occurring as a result of the making,
using,  or  selling  of a  product,  process,  or service by or on behalf of the
Sponsor, its assignees, or licensees,  which was derived from the work performed
under this Work for Others  Agreement.  In respect to this Article,  neither the
Government nor the Contractor shall be considered  assignees or licensees of the
Sponsor, as a result of reserved Government and Contractor rights. The indemnity
set forth in this  paragraph  shall  apply only if the  Sponsor  shall have been
informed as soon and as  completely  as practical by the  Contractor  and/or the
Government  of the  action  alleging  such  claim and shall  have been  given an
opportunity,  to the maximum  extent  afforded by  applicable  laws,  rules,  or
regulations,  to  participate  in and control its  defense,  and the  Contractor
and/or Government shall have provided all reasonably  available  information and
reasonable  assistance  requested by the  Sponsor.  No  settlement  of an action
against  the  Contractor  and/or  Government  for  which  the  Sponsor  would be
responsible  shall  be  made  without  the  consent  of the  Sponsor  and of the
Contractor and the Government (whenever either or both of the latter two parties
are  involved),  unless  required  by  final  decree  of a  court  of  competent
jurisdiction.

Article XII.  INTELLECTUAL PROPERTY INDEMNITY - LIMITED (DEVIATION)
              -----------------------------------------------------

The  Sponsor  shall  indemnify  the  Government  and the  Contractor  and  their
officers,  agents,  and  employees  against  liability,   including  costs,  for
infringement  of any United  States  patent,  copyright,  or other  intellectual
property  arising  out of any acts  required  or  directed  by the Sponsor to be
performed under this Agreement to the extent such acts are not already performed
at the facility.  Such indemnity shall not apply to a claimed infringement which
is settled  without  the consent of the  Sponsor  unless  required by a court of
competent jurisdiction.  Sponsor shall be entitled to notice, the opportunity to
defend and control the defense,  and  cooperation  from the  Contractor  and the
Government as more fully described in Article XI.

Article XIII.  NOTICE AND ASSISTANCE REGARDING PATENT AND COPYRIGHT INFRINGEMENT
               -----------------------------------------------------------------

The Sponsor shall report to the Department and the  Contractor,  promptly and in
reasonable written detail, each claim of patent or copyright  infringement based
on the  performance of this  Agreement of which the Sponsor has  knowledge.  The
Sponsor shall furnish to the  Department and the  Contractor,  when requested by
the Department or the Contractor, all evidence and information in the possession
of the Sponsor pertaining to such claim.

Article XIV.   PATENT RIGHTS - USE OF FACILITIES (CLASS WAIVER) (DEVIATION)
               ------------------------------------------------------------


1.       Definitions
         -----------  

         A.     "Subject  Invention"  means any  invention  or  discovery of the
                Contractor, or, to the extent the Sponsor is performing any work
                under this Agreement, of the Sponsor, conceived in the course of
                or  under  this  Agreement,  or,  in the  case  of an  invention
                previously  conceived by the Sponsor,  first actually reduced to
                practice  in the  course of or under  this  Agreement.  "Subject
                Invention"   includes  any  art,   method,   process,   machine,
                manufacture,  design or  composition  of matter,  or any new and
                useful  improvement  thereof,  or any variety of plant,  whether
                patented  or  unpatented  under the  Patent  Laws of the  United
                States of America or any foreign country.

         B.     "Patent  Counsel"  means the DOE Patent  Counsel  assisting  the
                procuring activity which has the  administrative  responsibility
                for the  facility  where the work under this  Agreement is to be
                performed.

2.       Rights of the Sponsor
         ---------------------

                  Election to retain rights

                  Subject to the  provisions  of paragraph  3.B. with respect to
                  any Subject Invention  reported and elected in accordance with
                  paragraph 4. of this  clause,  the Sponsor may elect to obtain
                  the entire right,  title, and interest throughout the world to
                  each Subject Invention and any patent application filed in any
                  country on a Subject  Invention  and in any  resulting  patent
                  secured  by the  Sponsor.  Where  appropriate,  the  filing of
                  patent applications by the Sponsor is subject to DOE and other
                  Government security regulations and requirements.

                  Minimum License

                  The Sponsor  reserves an  irrevocable,  nonexclusive,  paid-up
                  license in each patent  application  filed in any country on a
                  subject  invention  and any  resulting  patent  in  which  the
                  Sponsor  does  not  elect  to  take  title  or  in  which  the
                  Government  acquires  title.  The license  shall extend to the
                  Sponsor's  domestic  subsidiaries,  and  affiliates,  if  any,
                  within the corporate  structure of which the Sponsor is a part
                  and shall include the right to grant  sublicenses  of the same
                  scope as the  Sponsor was  legally  obligated  to do so at the
                  time this  agreement  was entered  into.  The license shall be
                  transferable  only  with  the  approval  of  DOE  except  when
                  transferred  to the  successor  of that part of the  Sponsor's
                  business to which the invention pertains.

3.       Rights of Contractor and Government
         -----------------------------------

                  A.       Assignment to either the Contractor or the Government
                  --------------------------------------------------------------

                           The Sponsor agrees to assign to either the Contractor
                           or the  Government,  as requested by the  Contractor,
                           the entire right,  title, and interest in any country
                           to each Subject  Invention of the Sponsor and to each
                           Subject  Invention  of  the  Contractor,   where  the
                           Sponsor:

                           (1)   does not elect pursuant to this clause to 
                                 retain such rights; or

                           (2)   elects to obtain  title to a Subject  Invention
                                 pursuant  to  paragraph  2. but fails to have a
                                 patent application filed in that country on the
                                 Subject  Invention  or decides  not to continue
                                 prosecution or not to pay any maintenance  fees
                                 covering the invention.

                  B.       Terms and Conditions of Waived Rights

                            (1)  To   preserve   the    Contractor's   and   the
                                 Government's   residual   rights   to   Subject
                                 Inventions,  and  in  patent  applications  and
                                 patents  on  Subject  Inventions,  the  Sponsor
                                 shall take all actions in reporting,  electing,
                                 filing   on,   prosecuting,   and   maintaining
                                 invention rights promptly, but in any event, in
                                 sufficient time to satisfy domestic and foreign
                                 statutory and regulatory time requirements, or,
                                 if the Sponsor decides not to take  appropriate
                                 steps to protect the invention rights, it shall
                                 notify the  Contractor  in  sufficient  time to
                                 permit either the  Contractor or the Government
                                 to  file,   prosecute,   and  maintain   patent
                                 applications and any resulting patents prior to
                                 the end of such  domestic or foreign  statutory
                                 or regulatory time requirements.

                           (2)   The   Sponsor   shall   convey  or  ensure  the
                                 conveyance   of   any   executed    instruments
                                 necessary to vest in either the  Contractor  or
                                 the  Government  the  rights  set forth in this
                                 clause.

                           (3)   With  respect to any Subject Invention in which
                                 the Sponsor obtains title, the Sponsor hereby 
                                 grants to the Government a  non-exclusive,  
                                 nontransferable, irrevocable,  paid-up  license
                                 to  practice  or have practiced  by or on 
                                 behalf of the  United  States the Subject 
                                 Invention throughout the world.

                           (4)   The Sponsor shall provide the Government a copy
                                 of any  patent  application  filed on a Subject
                                 Invention    within   6   months   after   such
                                 application  is  filed,  including  its  serial
                                 number and filing date.

                           (5)   Preference for U.S.  Industry.  Notwithstanding
                                 any other provision of this clause, the Sponsor
                                 agrees that  neither it nor any  assignee  will
                                 grant to any person the exclusive  right to use
                                 or sell any  Subject  Invention  in the  United
                                 States  unless  such  person  agrees  that  any
                                 products  embodying  the Subject  Invention  or
                                 produced   through   the  use  of  the  Subject
                                 Invention will be manufactured substantially in
                                 the  United  States.   However,  in  individual
                                 cases,  the  requirement  for such an agreement
                                 may be  waived  by DOE  upon a  showing  by the
                                 Sponsor or its  assignee  that  reasonable  but
                                 unsuccessful  efforts  have  been made to grant
                                 licenses   on   similar   terms  to   potential
                                 licensees  that would be likely to  manufacture
                                 substantially  in the  United  States  or  that
                                 under the circumstances domestic manufacture is
                                 not commercially feasible.

                           (6)   March-In  Rights.  The Sponsor agrees that with
                                 respect  to  any  Subject   Invention   of  the
                                 Contractor in which it has acquired title,  the
                                 DOE  shall  retain  the  right to  require  the
                                 Sponsor  to  grant a  responsible  applicant  a
                                 nonexclusive, partially exclusive, or exclusive
                                 license  to use the  Subject  Invention  in any
                                 field  of use,  on terms  that  are  reasonable
                                 under  the  circumstances,  or if  the  Sponsor
                                 fails to grant  such a  license,  to grant  the
                                 license  itself.  DOE may  exercise  this right
                                 only in exceptional  circumstances  and only if
                                 DOE determines that:

                                 (a)  the action is  necessary to meet health or
                                      safety  needs  that  are  not   reasonably
                                      satisfied by the Sponsor; or

                                 (b)  the  action  is   necessary  to  meet  the
                                      requirements  for public use  specified by
                                      Federal  regulations and such requirements
                                      are  not   reasonably   satisfied  by  the
                                      Sponsor; or

                                 (c)  such   action  is   necessary   because  a
                                      licensee of the exclusive  right to use or
                                      sell any Subject  Invention  in the United
                                      States  is  in  breach  of  the  agreement
                                      required by paragraph 3.B.(5).


                           (7)   The  Sponsor   agrees  to  refund  any  amounts
                                 received  as  royalty  charges  on any  Subject
                                 Invention in procurement by or on behalf of the
                                 Government  and to provide  for that  refund in
                                 any instrument transferring rights to any party
                                 in the invention.

                           (8)  The  Sponsor  agrees  to  include,   within  the
                                specification  of  any  United   States  patent
                                applications  and any patent issuing thereon 
                                covering a Subject Invention, the following 
                                statement.  "The Government has rights in this  
                                invention  pursuant to
                                (specify this underlying Agreement)."

4.       Invention Identification, Disclosures, and Reports
         ---------------------------------------------------

         A.     The  Sponsor  shall  furnish  the Patent  Counsel a written  
                report  containing  full and  complete technical  information  
                concerning each Subject Invention it makes within 6 months 
                after conception or first actual  reduction  to practice,  
                whichever  occurs  first,  in the course of or under this
                Agreement,  but in any  event  prior to any on sale,  public  
                use,  or  public  disclosure  of such invention  known to the 
                Sponsor.  The report shall  identify the contract and inventor 
                and shall be sufficiently  complete in technical  detail and  
                appropriately  illustrated by sketch or diagram to convey to one
                skilled  in the art to which the  invention  pertains a clear  
                understanding  to the extent  known at the time of  disclosure, 
                of the  nature,  purpose,  operation,  and to the extent
                known, the physical,  chemical,  biological,  or electrical  
                characteristics of the invention.  The report  should also 
                include any election of invention  rights under this clause.  
                When an invention is  reported  under  this  paragraph  
                4.A,  it shall be  presumed  to have been made in the  manner
                specified in Section (a)(1) and (2) of 42 USC 5908.

         B.     The  Contractor  shall report  Subject  Inventions it makes in 
                accordance  with the  procedures set forth in contract  
                DE-AC05-96OR22464.  In addition,  the  Contractor shall disclose
                to the Sponsor at the same time as disclosure to the  Department
                any Subject  Inventions  made by the  Contractor under this  
                Agreement  and the Sponsor  shall notify the  Department within 
                6 months of receipt of such  disclosure  by the Sponsor of any 
                election of patent  rights under this clause.  With respect
                to Subject  Inventions of which  Contractor  personnel are 
                inventors,  Contractor shall execute and deliver, or as 
                appropriate,  cause  the  inventors  to  execute  and  deliver, 
                to  Sponsor  any assignments  or other  instruments  reasonably 
                necessary to the filing of patent  applications  by
                Sponsor, or to the perfection and confirmation of Sponsor's 
                title in the Subject Invention.

         C.     Requests for extension of time for election under  subparagraphs
                A and B may be granted by Patent Counsel for good cause shown in
                writing.

5.       Limitation of Rights
         ----------------------

         Nothing  contained in this patent rights clause shall be deemed to give
         the  Government  any rights with respect to any invention  other than a
         Subject  Invention  except as set forth in the  Facilities  License  of
         paragraph 6.

6.       Facilities License
         ------------------

         In addition to the rights of the Parties with respect to  inventions or
         discoveries  conceived  or first  actually  reduced to  practice in the
         course  of or under  this  Agreement,  the  Sponsor  agrees to and does
         hereby grant to the Government an irrevocable,  non-exclusive,  paid-up
         license in and to any  inventions  or  discoveries  regardless  of when
         conceived  or first  actually  reduced to  practice  or acquired by the
         Sponsor,  which at any time, through completion of this Agreement,  are
         owned or controlled by the Sponsor and are incorporated in the facility
         as a result of this  Agreement  to such an extent that the  facility is
         not restored to the  condition  existing  prior to the Agreement (1) to
         practice or to have practiced by or for the Government at the facility,
         and (2) to transfer such license with the transfer of the facility. The
         acceptance or exercise by the  Government  of the aforesaid  rights and
         license shall not prevent the  Government  at any time from  contesting
         the enforceability,  validity,  or scope of, or title to, any rights or
         patents herein licensed.

7.       Early Termination of Agreement
         ------------------------------

         The terms and conditions of this clause shall survive the Agreement, in
         the event that the  Agreement is  terminated  before  completion of the
         Statement of Work.


Article XV.  RIGHTS IN TECHNICAL DATA - USE OF FACILITY     
                  (DEVIATION) 

A.       Definitions

         1.   "Generated Information" means information produced in the 
              performance of this Agreement.


         2.   Proprietary  Information" means information which is developed  at
              private  expense and (1) trade secrets or (2)  commercial or 
              financial information which is privileged or confidential under 
              the Freedom of Information  Act (5 USC 552 (b)(4)).  The term 
              includes  information  communicated  orally or by other means,  
              if the  information  is  designated at the time of disclosure or 
              thirty (30) days thereafter  as  Proprietary  Information,  or if 
              it  is  identical  to  of  documentary  information designated as 
              Proprietary  Information,  or if the  recipient  knows that it  
              embodies  Proprietary Information  previously  submitted  in  
              documentary  form  and  appropriately   designated  as  such.
              Proprietary  Information includes Generated  Information  which  
              is  categorized  and  marked  as Proprietary  Information by 
              Sponsor or by Contractor at Sponsor's direction. Generated 
              Information which has not yet been categorized by Sponsor as to 
              whether it is Proprietary  Information  will be treated as 
              Proprietary  Information of the Sponsor  pending such  
              categorization.  Information  shall be  deemed  appropriately  
              marked  as  Proprietary  Information  if  it  is  marked  as  
              "Proprietary Information"  or marked with words of manifestly  
              similar meaning such as  "Confidential",  "Secret",
              "Trade Secret" or "Proprietary".

         3.   "Unlimited  Rights" means the right to use,  disclose,  reproduce,
              prepare  derivative works,  distribute  copies to the public,  and
              perform publicly and display  publicly,  in any manner and for any
              purpose, and to have or permit others to do so.

B.       The Sponsor agrees to furnish to the Contractor or leave at the 
         facility that  information,  if any, which is (1) essential to the 
         performance of work by the Contractor personnel or (2) necessary for 
         the health and  safety  of  such  personnel  in the  performance  of  
         the  work.  Any  information  furnished  to the Contractor  shall be 
         presumed to have been delivered with Unlimited Rights unless marked as 
         described in paragraph A.2 above;  provided,  that if Sponsor  
         inadvertently  delivers Proprietary  Information without such markings,
         then (1) Sponsor shall have the right at any time to place such 
         markings  thereon,  and Contractor  shall  cooperate fully with such 
         effort;  and (ii)  Contractor  shall not be liable to Sponsor
         for any use or disclosure of that  information,  in good faith,  
         between the time of initial  delivery and the time Sponsor informs  
         Contractor that the information is Proprietary  Information and should 
         be marked as such.  Once the items are so marked, they shall from that
         point forward be treated as Proprietary Information.

C.      The Sponsor may  designate as  Proprietary  Information  any Generated  
        Information, where such data would embody trade secrets or would 
        comprise commercial or financial information that is privileged  or
        confidential if it were obtained from the Sponsor.  Such Proprietary  
        Information  will,  to the extent permitted by law, be maintained  in 
        confidence  and  disclosed or used by the  Contractor  (under  suitable
        protective  conditions) only for the purpose of carrying out the 
        Contractor's  responsibilities  under this Agreement.  If so authorized 
        by Sponsor, Contractor shall, on Sponsor's behalf, use its best efforts 
        to locate and  appropriately  mark all  copies of  Generated Information
        which Sponsor has designated as Proprietary Information (such 
        designation to be either by specific reference to particular 
        information, or categorical descriptions of types of Generated 
        Information constituting  Proprietary  Information.).  If
        information  is not marked by the  Contractor  when  delivered  to the 
        Sponsor and the Sponsor  believes it should be marked,  the Sponsor will
        mark the  information  itself and notify the Contractor of the omission
        that the Sponsor  believes to have occurred and the fact that the 
        Sponsor has affixed such  marking.  Until such  time as any  particular 
        Generated  Information  has  been  categorized and marked as Proprietary
        Information , Contractor will treat it as Proprietary  Information.  
        Contractor  may, at any time,  request guidance from Sponsor as to 
        whether particular information should be designated and marked as 
        Proprietary Information.  Upon completion of activities under this 
        Agreement (or, if appropriate,  upon completion of a given Task Order), 
        such  Proprietary  Information  and all copies thereof will be disposed 
        of as requested by the Sponsor,  at the  Sponsor's  expense.  Before the
        Contractor  releases  data  associated  with this Agreement  to anyone, 
        the  Sponsor  will be afforded  the  opportunity  to review  that data 
        to  ascertain whether it is Proprietary Information and to mark it as 
        such.

D.       The Government and Contractor agree to not disclose Proprietary 
         Information that is properly marked,  or Generated  Information  that 
         has not yet been  categorized  by the Sponsor as to whether it is 
         Proprietary Information  to  anyone  other  than the  Sponsor  without 
         written  approval  of the  Sponsor,  except to Government  employees  
         who are subject to the statutory provisions against disclosure of  
         confidential information  set forth in the Trade Secrets Act 
         (18 USC 1905).  The Government  and Contractor  shall have the right, 
         at reasonable  times up to 3 years after the  termination or completion
         of the  Agreement,  to inspect  any  information  designated  as  
         Proprietary  Information  by the  Sponsor,  for the  purpose of
         verifying that such information has been properly identified as 
         Proprietary Information.

E.       By, or within ninety (90) days after,  the date of  termination or 
         expiration of this  Agreement,  Sponsor shall  request the removal of 
         all of its Proprietary Information from the facility, at the  Sponsor's
         expense,  and when such request is made Contractor  shall assemble and
         deliver to the Sponsor the original and all copies of such information 
         and the Sponsor shall accept it and shall then be responsible for its
         removal from the facility.  The Government and Contractor  shall have 
         Unlimited  Rights in any information which is not removed from the 
         facility by Sponsor  after  delivery by  Contractor  to Sponsor as 
         described above,  or which is not  requested  by Sponsor to be  
         assembled  and  delivered  to Sponsor by  Contractor within the time 
         limit described  above.  Notwithstanding  the foregoing,  by mutual  
         consent,  Sponsor may allow Contractor or the Government to retain 
         copies of Proprietary  Information  without  compromising its
         status as such; for example,  the  information  might be needed for 
         follow-on tasks hereunder or for other projects to be undertaken by the
         Contractor or the Government with Sponsor's  consent. The Government 
         and Contractor  shall have Unlimited  Rights in any Proprietary  
         Information  which is  incorporated  into the facility or  equipment  
         under this  Agreement at  Sponsor's  request,  to such extent that the 
         facility or equipment is not restored to the condition existing prior 
         to such incorporation.

F.       The Sponsor agrees that the Contractor will provide to the Department a
         nonproprietary description of the work performed under this Agreement.

G.       The Government shall have Unlimited Rights in all Generated Information
         produced or information  provided by the Parties under this  Agreement,
         except  for  information  which is  disclosed  in a  Subject  Invention
         disclosure  being  considered  for  patent  protection,   or  which  is
         Proprietary Information.

H.       Copyrights
         ----------

         The Sponsor may assert  copyright in any of its Generated  Information,
         and may also  require the  Contractor,  at the  Sponsor's  expense,  to
         register  copyright  and/or  to  assign  to  Sponsor  copyright  in any
         Generated  Information produced by the Contractor and designated by the
         Sponsor.  Subject to the other  provisions  of this  clause,  including
         particularly  those  relating to  Proprietary  Information,  and to the
         extent that copyright is asserted, the Government reserves for itself a
         royalty-free,   world-wide,  irrevocable,   non-exclusive  license  for
         Governmental  purposes to publish,  distribute,  translate,  duplicate,
         exhibit,  prepare  derivative works, and perform any such data assigned
         to the Sponsor.

I.       The terms and conditions of this clause shall survive the Agreement.

Article XVI.  ASSIGNMENT (DEVIATION)
              ----------------------

Neither this  Agreement nor any interest  therein or claim  thereunder  shall be
assigned or transferred by either Party,  except as authorized in writing by the
other Party to this  Agreement,  which  authorization  shall not be unreasonably
withheld or delayed, provided, the Contractor may transfer it to the Department,
or its designee, with notice of such transfer to the Sponsor, and the Contractor
shall have no further  responsibilities  except  for the  confidentiality,  use,
and/or  non-disclosure  obligations of this Agreement.  In the event  Contractor
proposes to disapprove any assignment or transfer by Sponsor, Sponsor shall have
the right to appeal that decision to the Director of the DOE Oak Ridge Office of
Partnerships  and  Program  Development,  and  Contractor  shall  comply  with a
decision,  if any, by such  Director  that this  Agreement  shall be assigned or
transferred as requested by Sponsor. Further provided,  however, that nothing in
this Article creates any enforceable right against DOE.

Article XVII.  SIMILAR OR IDENTICAL SERVICES
               -----------------------------

The  Government  and/or  Contractor  shall have the right to perform  similar or
identical  services in the Statement of Work (SOW) for other Sponsors as long as
the Sponsor's Proprietary Information is not utilized.

Article XVIII.  EXPORT CONTROL
                --------------

Each  Party is  responsible  for its own  compliance  with laws and  regulations
governing export control.

Article XIX.  TERMINATION (DEVIATION)
              -----------------------

Performance of work under this Agreement may be terminated at any time by either
Party,  without  liability,  except as provided above, upon giving a thirty (30)
day  written  notice to the other  Party.  [Confidential  Treatment  Requested],
provided  however,  that the Contractor shall have the right to terminate if the
Sponsor shall have failed to advance the funds required by Article IV and failed
to cure the same within thirty (30) days after written  notice to Sponsor of the
default.  In the event of termination,  the Sponsor shall be responsible for the
Contractor's  costs through the effective date of  termination  which are either
(a)  incurred in the  performance  of tasks  which the Sponsor has  specifically
requested  Contractor to perform after the notice of termination is given,  such
as completing  experiments  in process,  providing the Sponsor with the research
data generated through the date of termination,  to finalize required reporting,
etc, or (b) are necessary closeout costs,  including but not limited to costs to
shut down any  experiment in process  which  Sponsor does not wish  completed or
which  cannot  be  completed  prior to  termination,  to pack  and ship  surplus
material and equipment, to finish categorizing Generated Information as provided
for in  Article  XV,  and to  assemble  Generated  Information  and  Proprietary
Information for transmittal to Sponsor; but in no event shall the Sponsor's cost
responsibility exceed the total cost to the Sponsor as described in Article III,
above. Closeout costs do not include costs for transitioning personnel.

It  is  agreed  that  any  obligations  of  the  Parties  regarding  Proprietary
Information or other intellectual property will remain in effect,  despite early
termination of the Agreement.

Article XX.  ALTERNATE DISPUTE RESOLUTION (DEVIATION)
             ----------------------------------------

Step 1.  NEGOTIATION

The Parties shall attempt in good faith to resolve any dispute arising out of or
relating to this Agreement by negotiating  between  executives  and/or officials
who have  authority to settle the  controversy  and who are at a higher level of
management than the persons with direct  responsibility  for  administration  of
this  contract.  Either  Party may give the other  Party  written  notice of any
dispute not  resolved  in the normal  course of  business.  Within 15 days after
delivery of the notice,  the receiving Party shall submit to the other a written
response.  The notice and the  response  shall  include (a) a statement  of each
Party's  position and a summary of arguments  supporting that position,  and (b)
the name and title of the  executive or official who will  represent  that Party
and of any other person(s) who will accompany the executive or official.  Within
30 days after delivery of the disputing  Party's notice,  the executives of both
Parties shall meet at a mutually  acceptable  time and place,  and thereafter as
often as they reasonably deem necessary,  to attempt to resolve the dispute. All
reasonable  requests  for  information  made by one party to the  other  will be
honored.

If the  matter has not been  resolved  within 60 days of the  disputing  Party's
notice,  or if the Parties fail to meet within 30 days,  either  party  initiate
mediation of the controversy or claim as provided hereafter.

All  negotiations  pursuant  to this  Agreement  are  confidential  and shall be
treated as compromise  and settlement  negotiations  for purposes of the Federal
Rules of Evidence and state rules of evidence.

Step 2.  MEDIATION

In the event the  dispute  has not been  resolved  by  negotiation  as  provided
herein,  the  Parties  agree  to  participate  in a one day  mediation,  using a
mutually agreed upon mediator. The mediator will not render a decision, but will
assist the Parties in reaching a mutually satisfactory agreement.

The  Parties  agree to  equally  split  the  costs of the  mediation.  The first
mediation  session shall commence within 30 days from agreement on the selection
of mediator.  The Parties may contact the DOE Office of Dispute  Resolution with
questions or for assistance  with selection of neutrals or samples of Agreements
to Mediate.

All  meditations  are  confidential  and  shall be  treated  as  compromise  and
settlement  negotiations for purposes of the Federal Rules of Evidence and state
rules of evidence.

Step 3.  ARBITRATION

Any dispute not otherwise  satisfactorily  resolved may, by mutual agreement, be
submitted to arbitration,  provided that both parties shall bear their own costs
of arbitration and further provided that such arbitration  shall be binding only
if the  Parties  have  previously  agreed upon the limits of the awards that may
result from arbitration,  pursuant to the Administrative  Dispute Resolution Act
through the American Arbitration  Association,  Jams/Endispute Center for Public
Resources,  United States  Arbitration  and  Mediation,  or other  reputable ADR
provider.


Article XXI.      CERTIFICATION

Sponsor  certifies  that to the best of its knowledge and belief the analysis or
other work or services to be provided hereunder cannot reasonably or practicably
be  conducted  in  private  facilities  or  with  private  equipment  reasonably
available.


IN WITNESS WHEREOF, THE PARTIES HERETO HAVE EXECUTED THIS 
AGREEMENT NO. ERD-99-1731


FOR LOCKHEED MARTIN ENERGY RESEARCH CORPORATION


Name:     /s/ Frank V. Damiano                                                  
         -----------------------------------
Title:   Sr. Contracts Admin                                                    
         -----------------------------------
Date:    March 25, 1999                                                     
         -----------------------------------


FOR THERAGENICS CORPORATION

Name:     /s/ Bruce W. Smith                                                   
         ------------------------------------
Title:   Executive V/P & CFO                                                    
         ------------------------------------
Date:    March 25, 1999                                                     
         ------------------------------------


ON BEHALF OF THE DEPARTMENT OF ENERGY

Name:    /s/ James A. Reafsnyder                                              
         ------------------------------------
         James A. Reafsnyder, Director       

Title:   Office of Partnerships and Program Development
         ----------------------------------------------

Date:    March 25, 1999                                                    
         -------------------------------------


<TABLE> <S> <C>


<ARTICLE>                     5

       
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<PERIOD-TYPE>                   3-mos
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<PERIOD-START>                                 JAN-01-1999
<PERIOD-END>                                   MAR-31-1999
<CASH>                                         $23,589,146
<SECURITIES>                                     9,522,224
<RECEIVABLES>                                    4,142,954
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