Jan 28, 2026 - Technology

New tritium harvesting record set for U.S. nukes

Colin Demarest

Green-lit industrial or scientific lab with metal equipment, tubes, wires, and control panels in a reflective metal-walled room. — The Target Rod Prep Module, which houses equipment essential to tritium extraction. Photo: Courtesy of NNSA

The National Nuclear Security Administration reported a record number of tritium extractions during fiscal years 2025 and 2026.

The big picture: Tritium, an isotope of hydrogen, boosts the yield of nuclear weapons. But it quickly decays, requiring repeat harvests.

Driving the news: Thirteen tritium extractions were conducted in nine months at the Savannah River Site in South Carolina, according to the NNSA.

That surpasses a previous benchmark of eight extractions in 12 months during fiscal years 2022 and 2023.

What they're saying: "What I think it shows is that Savannah River has been, over the past several years, in an upswing on tritium production, and that is really good for" the nuclear arsenal, Frank Rose, a former NNSA deputy and assistant secretary for arms control, verification and compliance, told Axios.

"If you're going to move forward with a larger stockpile, you're going to need more tritium."

Zoom out: The National Defense Strategy, published Jan. 23, commits to upgraded armaments "amidst the changing global nuclear landscape."

More from Axios:

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Introducing Trump's puzzling nuclear-armed battleship

Energy Department orders "special" investigation of plutonium pit problems

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New tritium harvesting record set for U.S. nukes

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