Declassification of Formerly Restricted Data

Formerly Restricted Data

The Second Open Government National Action Plan for the United States of America (NAP 2.0) called for the DoD, Department of Energy (DOE), and Department of State (DOS) to determine, consistent with applicable statutes, how to implement a systematic review process for the declassification of no-longer sensitive historical information on nuclear programs (Formerly Restricted Data or FRD), focusing on specific events and topics of historical nuclear policy interest and ways for the public to help identify priorities for declassification review.

DoD and DOE have developed a process to begin the declassification process with DOS participating as necessary. Under the Joint DoD-DOE working process, FRD topics are brought forward thru routine partnership & engagement and are evaluated for declassification in the context of technical, policy / political, and administrative benefits.

New Updated Information - Briefing on the DoD/DOE FRD Declassification Process

Declassification Actions:

New Updated Information  The fact that a specified nuclear weapon does or does not have a rapidly-selectable yield or dial-a-yield capability with no elaboration as to the number of selectable yields.

The total size of the U.S. nuclear stockpile and the number of weapons dismantled for disposal, both as of:

The fact that any specified retired nuclear weapon was at a former (now closed) nuclear weapon storage location or former (now closed) operational location (e.g. Nike site, bomber bases, etc.) within the United States, its possessions, and territories.

The fact that U.S. nuclear weapons were deployed on Okinawa prior to Okinawa's reversion to Japan on May 15, 1972.

The fact that prior to the reversion of Okinawa to Japan that the U.S. Government conducted internal discussion, and discussions with Japanese government officials regarding the possible re-introduction of nuclear weapons onto Okinawa in the event of an emergency or crisis situation.

The fact that the last W80-0 TLAM-N warhead was retired from Department of Defense service on August 31, 2011. As of August 31, 2011, the Department of Defense considers the W80-0 warhead as totally removed from the nuclear arsenal.

The fact that the yield of the B53/W53 Y1 was 9 megatons.

The John event (nuclear weapons test) conducted on 7/19/1957 was a W25 warhead on an air-to-air Genie rocket launched from an F89J fighter aircraft.

The Frigate Bird event conducted on 5/6/1962 was a W47 warhead on a Polaris A1 missile launched from the USS Ethan Allen (SSB-608) as part of the system proof test.

The actual yield of the Argus I, Argus II, and Argus III tests that took place between July 27, 1958 and October 6, 1958 was 1.7 kt.

The fact that the “Archie” radar used for the Mk II “Little Boy”, “Fat Man”. Mk III, and Mk4 nuclear bombs, was the APS-13 “Tail Gun Charlie” radar in essentially unmodified form.

The total number of nuclear weapons afloat for each fiscal year from FY 1953 through FY 1991 and the total number of nuclear weapons afloat for each fiscal year by region from FY 1961 through FY 1991. Click Here to view the numbers.






New Updated Information Updated DoD Nuclear Matters Handbook

DoE: An Overview of the Restricted Data and Formerly Restricted Data Classification System

Link to the Atomic Energy Act of 1954