NNSA issued a Supplemental Environmental Impact Statement for Enhanced Plutonium Facility Utilization at Lawrence Livermore National Laboratory (DOE/EIS-0547-S1).
Office of NEPA Policy and Compliance
May 21, 2026
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Supplemental EIS for Enhanced Plutonium Facility Utilization; Alameda County, California
The National Nuclear Security Administration (NNSA), a semi-autonomous agency within the U.S. Department of Energy (DOE), issued a Supplemental Environmental Impact Statement (SEIS) for Enhanced Plutonium Facility Utilization at Lawrence Livermore National Laboratory (LLNL) in Livermore, California (DOE/EIS-0547-S1), tiered from the 2023 LLNL Site-Wide Environmental Impact Statement (DOE/EIS-0547). This project would increase the amount of fissile materials for research and development (R&D) operations at the Plutonium Facility, which would require increasing the facility Security Category (CAT) from Security CAT III operations to Security CAT II.
For more information, see Supplemental EIS for Enhanced Plutonium Facility Utilization.