FAS Note: This Department of Energy fact sheet was prepared by the Department of Energy in late 2000.
PROPOSED DECLASSIFICATION OF THE YIELDS OF RETIRED NUCLEAR
(CURRENTLY FORMERLY RESTRICTED DATA)*
1956 Yields of Trinity (21 Kt), Hiroshima (Little Boy 15 Kt), and Nagasaki (Fat Man 21 Kt) declassified. May 1998 As part of Fundamental Classification Policy Review, DOE and DoD agree that Maximum Credible, Design, and Test Yields should remain classified May 1993 "DOE believes that historical stockpile information, e.g., retired systems, should be declassified, including yield information. However, remaining information about current active systems, including yields needs to be classified...." June 1994 DoD [ATSD(AE) and DNA] approved total yield of stockpile indicated by years for years 1945 to 1994, provided: "....we do not reveal the yields of individual weapons either active, or previously retired or dismantled."
No ongoing actions to declassify yields of retired or dismantled weapons
DOE Eugene E. Habiger
Joseph S. Mahaley
Roger K. Heusser
DoD Arthur L. Money
J. William Leonard
COL William T. Coleman
* Requires joint DOE/DoD agreement for declassification