U.S. Faces Critical Tritium Shortage Threatening Fusion Reactors and Nuclear Warheads
America’s dwindling tritium supply, essential for both commercial fusion plants and the nuclear weapons stockpile, could run out within years unless the supply chain is rebuilt.
The United States relies on a tiny, decaying stock of tritium for both the next generation of fusion power plants and the maintenance of its nuclear warhead arsenal. With a half-life of 12.33 years, tritium losses exceed 5 percent annually, and worldwide civilian reserves total only 20-30 kilograms, priced at about $33,000 per gram. Production is limited to by-product recovery at Canada’s Darlington plant and South Korea’s Wolsong facility, each yielding less than a kilogram per year.
The Savannah River Site processes tritium-producing rods from the Watts Bar reactors for the military, but all harvested material is earmarked for defense use. The article outlines four policy steps: a 20-year interagency demand forecast, DOE and Pentagon investment in lithium-6 separation under the Defense Production Act, development of alternative civilian tritium sources such as Los Alamos’s accelerator-driven molten-salt project, and congressional action to secure unobligated low-enriched uranium supplies needed for reactor irradiation. Failure to act could stall commercial fusion ventures and compromise the nuclear stockpile.
Why it matters
A tritium shortage would delay clean-energy fusion projects and jeopardize the reliability of the U.S. nuclear deterrent.
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