NNSA Amended Record of Decision for Disposition of Fast Critical Assembly Plutonium (March 2021)

The National Nuclear Security Administration (NNSA) amended its decision for disposition of up to 350 kilograms of stainless-steel clad plutonium from Japan’s Fast Critical Assembly reactor. Instead of preparing this material for emplacement in the Waste Isolation Pilot Plant as analyzed in Surplus Plutonium Disposition Supplemental EIS (DOE/EIS-0283-S2, 2015), NNSA decided to disposition it by electrolytic dissolution in H-Canyon, vitrification with high level radioactive waste at the Defense Waste Processing Facility, and storage at the Savannah River Site until a geologic repository is available. NNSA prepared Supplement Analysis for the Disposition of Fast Critical Assembly Plutonium (DOE/EIS-0283-S2-SA-02, January 2021) to inform this amended decision and determined that no additional NEPA review is required.

For more information, see EIS-0283-S2: Surplus Plutonium Disposition Supplemental Environmental Impact Statement.