Department of Energy
Declassification Decisions

Selected DOE Memoranda of Decisions on Declassification

as released under the Freedom of Information Act

Declassification of specified reconciled quantity of Pu under IAEA safeguards at Savannah River building 105-K, August 27, 2020

Declassification of non-pit metal plutonium shipped from Rocky Flats to Savannah River, April 25, 2019

Declassification of fact of transfer of 1 MT of plutonium from Savannah River for pit production at Los Alamos, June 26, 2018

Declassification of certain equations of state, April 4, 2018

Declassification of [DELETED], April 4, 2018

Declassification of output results from LASNEX ICF simulation code, April 4, 2018

Declassification of stockpile size as of September 30, 2017, March 13, 2018

Declassification of downblending of approximately 25 MT of HEU, October 19, 2017

Declassification of fact that a specified weapon has a dial-a-yield capability, January 12, 2017

Declassification of stockpile size as of September 30, 2016, January 10, 2017

Declassification of getter nickel plating thickness, August 29, 2016

Declassification of fact that any retired weapon was at a former storage location in the US, August 12, 2016

Declassification of specific country assessed by Nuclear Material Inventory Program, July 21, 2016

Declassification of stockpile size as of September 30, 2015, March 13, 2016

Declassification of historical presence of US nuclear weapons in Okinawa, July 1, 2015

Declassification of stockpile size as of September 30, 2014, April 10, 2015

Declassification of yield of nuclear weapon tests Argus I, II and III, February 12, 2015

Declassification of number of nuclear weapons afloat from FY1961-1991, February 12, 2015

Declassification of use and design of "Archie" radar, February 12, 2015

Declassification of total weapon yield of B53/W53 Y1, November 20, 2014

Declassification of weapon safing by insertion of inert material into pit, November 20, 2014

Declassification of aspects of thermonuclear initiators, August 19, 2014

Declassification of sufficiency of 52.5 kg of U-235 for a gun-type weapon, August 19, 2014

Declassification of aspects of thermally-stabilized PETN, August 19, 2014

Declassification of stockpile size as of September 30, 2013, March 24, 2014

Declassification of existence of unlimited life neutron generators, October 24, 2013

Declassification of the neutron tube cleaning process sequence, October 24, 2013

Declassification of the initial shelf life of a neutron generator, October 24, 2013

Declassification of gas boost reservoir technology, October 24, 2013

Declassification of U-235 mass detection threshold for verification purposes, October 21, 2013

Declassification of stockpile size, June 17, 2013

Declassification of response time for July 28, 2012, Y-12 event, May 1, 2013

Declassification of thorium inventory, March 20, 2013

Declassification of visual access to internal converter components, October 2, 2012

Declassification of seal disk specifications, October 2, 2012

Declassification of plutonium inventories, December 20, 2011

Declassification of fact that B61 nuclear bomb is deployed to NATO, April 8, 2011

Declassification of fact that commercial inorganic membranes are extruded, August 2, 2010

Declassification of U.S. nuclear stockpile and annual dismantlements, May 6, 2010

Declassification of the total size of the U.S. nuclear stockpile through 2009, April 30, 2010

Declassification of Tactical Ferry Incident of August 29-30, 2007, March 25, 2010

Declassification of fact that beryllium may be present within weapon subassembly, March 18, 2010

Declassification of select U.S. centrifuges operated between 1961 and 1967, October 31, 2008

Declassification of maximum storage capacity of the proposed Consolidated Nuclear Production Center, March 21, 2008

Disposition of additional surplus highly enriched uranium, February 6, 2008

Declassification of fact that thorium metal is used in radiation case of W71 warhead, January 14, 2008

Declassification of the unfinished winding mandrel outer diameter and rotor tube length for the USEC American Centrifuge Program, July 3, 2007

Declassification of fact that Cannikin event was a proof test of the W71 warhead, March 14, 2007

Declassification of fact that a W44 warhead was detonated in the Swordfish shot, March 14, 2007

Declassification of sequence of operations for the Thermal Cycling Absorption Process, March 8, 2007

Changes in classification guidance for the USEC American Centrifuge Program, October 12, 2006

Declassification of fact that PRC obtained design information on the W88 warhead, August 18, 2006

Declassification of aspects of historical radiation warfare programs, August 18, 2006

Declassification of total number of armature permanent magnets procured in the USEC American centrifuge program, June 20, 2006

Declassification of "specific lubricating oil used with the USEC gas centrifuge", June 13, 2006

Declassification of "Design, specifications, or drawings for the column assembly support rod and the support rod (hardware), per se, used in the USEC gas centrifuge and U.S. Gas Centrifuge", June 13, 2006

Declassification of Aluminum alloy and temper used in USEC, Inc. American centrifuge program, March 27, 2006

Updated guidance for USEC American Centrifuge Program, March 17, 2006

Declassification of aggregate total of operationally deployed strategic nuclear warheads, May 2, 2005

Declassification of Equation of State data for monobismuthide compounds of an actinide element, March 8, 2005

Declassification of deployed strategic nuclear warheads as of December 31, 2003, November 10, 2004

Declassification of "optical pumping" in the plutonium AVLIS process, January 15, 2004

Recommendations of the LANL Technical Evaluation Panel, September 17, 2003

Restricted Data Annual Report, 2008-2010, excerpts

Restricted Data Annual Report, 2007, excerpts

Restricted Data Annual Report, 2005-2007, March 21, 2008

Restricted Data Annual Report, 2005-2007, alternate version

2004 Report on Restricted Data Declassification Determinations, July 5, 2005

2003 Report on Restricted Data Declassification Determinations, March 2, 2004

2002 Report on Restricted Data Declassification Determinations, February 20, 2003

Restricted Data Declassification Decisions, 1946 to the Present, Department of Energy, RDD-8, January 1, 2002

FAS | Secrecy | Other Gov Docs || Join FAS |