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The United States Plutonium Balance, 1944-2009

The United States has released an inventory of its plutonium balances from 1944 through 2009. The document serves as an update to Plutonium: the First 50 Years, which was first released by the U.S. Department of Energy (DOE) in 1996. The report provides the US inventory of plutonium owned by DOE and includes material in the possession of the Department of Defense (DOD).

As an update to the report released in 1996, the current document provides data on the plutonium inventory through 2009. The four most significant changes since 1994 include: the completion of clean-up activities at the Rocky Flats Plant in Colorado in 2005; material consolidation and disposition activities; 2007 declaration of an additional 9.0 MT of surplus weapons- grade plutonium; and the opening of the Waste Isolation Pilot Plant (WIPP) in New Mexico. The updated report does not account for material highly enriched uranium (HEU), planned disposition activities such as the Mixed Oxide Fuel Fabrication Facility, or material obtained through the President’s four year plan to secure vulnerable nuclear material around the globe.

The most recent release, reference material, and the 1996 release an associated fact sheet are available for download below.

US Plutonium Blance as of 2009

The United States Plutonium Balance, 1944-2009

Reference Documents

DOE Decision to Consolidate Surplus Pu in South Carolina

US Removes 9 MT of Pu from Nuclear Weapons Stockpile

Previous Documents

Plutonium: The First 50 Years (February 1996, DOE/DP-0137)

DOE Fact Sheet: Declassification of The US Pu Inventory and Release of Report Plutonium: The First 50 Years