Notice of Intent To Prepare a Supplement to the Stockpile Stewardship and Management Programmatic Environmental Impact Statement-Complex 2030

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The National Nuclear Security Administration (NNSA), an agency within the U.S. Department of Energy (DOE or Department), announces its intent to prepare a Supplement to the Stockpile Stewardship and Management Programmatic Environmental Impact Statement--Complex 2030 (Complex 2030 SEIS or SEIS, DOE/EIS-0236-S4), pursuant to the National Environmental Policy Act (NEPA) of 1969 (42 U.S.C. 4321 et seq.), the Council on Environmental Quality's (CEQ's) and DOE's regulations implementing NEPA (40 CFR parts 1500-1508 and 10 CFR part 1021, respectively). The SEIS will analyze the environmental impacts from the continued transformation of the United States' nuclear weapons complex by implementing NNSA's vision of the complex as it would exist in 2030, which the Department refers to as Complex 2030, as well as alternatives. Since the end of the Cold War, there continue to be significant changes in the requirements for the nation's nuclear arsenal, including reductions in the number of nuclear weapons. To fulfill its responsibilities for certifying the safety and reliability of nuclear weapons without underground testing, DOE proposed and implemented the Stockpile Stewardship and Management (