The Y-12 National Security Complex recently completed a highly successful 2026 lithium metal production campaign, nearly doubling its Fiscal Year (FY) 2026 goal and marking the most successful campaign in decades. This accomplishment also significantly increased Y-12’s stockpile of enriched lithium, helping to ensure the future of the nation’s nuclear deterrent. The lithium metal produced at Y-12 is unlike lithium used for batteries because it is enriched for use as part of the nation’s nuclear weapons deterrent. Brandon Williams, National Nuclear Security Administration (NNSA) Administrator and Department of Energy Under Secretary for Nuclear Security, said, “This achievement is a major win for America’s nuclear deterrent and a clear sign that Y-12 is delivering when the mission demands it most. By far exceeding its lithium processing goal, Y-12 demonstrated the kind of disciplined production performance the nation’s deterrent requires.”