Fissile Materials Disposition

Since the end of the Cold War, significant quantities of plutonium and highly enriched uranium have become surplus to the defense needs of both the United States and Russia. The Office of Fissile Materials Disposition (FMD) plays an important role in enhancing global nuclear security by disposing of this surplus weapon-grade plutonium and highly enriched uranium (HEU) in a safe and secure manner, allowing the United States to meet our international disarmament and nonproliferation commitments. The office achieves this by overseeing all activities relating to the disposition of HEU and plutonium which are excess to U.S. national security needs and assists Russia in its efforts to eliminate its surplus weapon-grade plutonium.

HEU Disposition Program down-blends HEU with natural or depleted uranium, which results in low enriched uranium (LEU) for peaceful use as nuclear reactor fuel. 

Plutonium Disposition Program works to dispose of at least 34 metric tons of weapon-grade plutonium under the U.S.-Russia Plutonium Management and Disposition Agreement (PMDA). FMD also supports Russia with its efforts to dispose of its surplus weapon-grade plutonium under this agreement.