Click on the links below to view the Circulars
- 18-02 Idaho National Laboratory Special Exposure Cohort Class between January 1, 1975 and December 31, 1980
- 18-03 Ames Laboratory Special Exposure Cohort (SEC) Class from January 1, 1971 through December 31, 1989
- 18-04 Updating information regarding employment by the Nuclear Material and Equipment Corporation (NUMEC)