Full Breakdown
U.S. DOE Opens Surplus Plutonium to Private Nuclear Start-ups
5/28/2026, 8:11:40 AM
Core Event
On 26 May 2026 the Energy Department announced that five firms—Oklo, Exodys Energy, SHINE Technologies, Standard Nuclear and Flibe Energy—entered advanced negotiations to receive Cold-War plutonium for reactor fuel.
Background & Timeline
The U.S. holds >50 t surplus plutonium from dismantled warheads. A March 2025 White House order halted dilution-and-burial, directing use for energy. DOE clarified in Oct 2025 the stock includes weapons-grade material. The prior disposal strategy, projected at $19 billion over three decades, involved diluting plutonium and encasing it in glass or concrete for deep-geologic burial. The March order reversed that approach.
Companies & Key Figures
Oklo (California) will partner with Newcleo (Europe) to fabricate fuel. Jacob DeWitte leads Oklo; Stefano Buono leads Newcleo. Energy Secretary Chris Wright, former Oklo board member, oversees the program.
Data & Why It Matters
The program targets up to 20 t—enough for ~2,000 bombs. Pu-239 half-life ?24,000 years. Oklo’s stock rose 5.5 % to $69.51. $2 billion fuel-fabrication site planned; original disposal cost $19 billion. The material could serve as bridge fuel to ease HALEU shortages after the 2024 ban on Russian imports, accelerating SMR deployment.
Official Statements & Responses
A DOE spokesperson said the Surplus Plutonium Utilization Program will unlock private funding, broaden fuel supplies, and spur recycling innovation. The March order was called a reversal of the prior disposal plan. The department also noted that specific safety, transport and security protocols remain under development and will be reviewed before any material transfer.
Criticism & Opposition
Ernest Moniz warned plutonium fuels have a poor track record and could create more weapons-usable material. Senator Markey’s letter said the transfer raises proliferation risk to rogue states. They also claim the plan is economically inefficient and could undermine U.S. defence posture by creating additional weapons-usable stockpiles.
Conflicting Reports & Gaps
Sources vary, describing the allocation as “about 20 t,” “nearly 20 t,” or “up to 20 t.” DOE’s grade breakdown remains unclear; safety protocols are pending.
Verbatim Quotes
- “Fuel supply constraints are a key throttle to advanced reactor development,” — Jacob DeWitte, Co-founder & CEO, Oklo
- “This program creates a pathway to use existing surplus material as bridge fuel for advanced reactors to bring more reactors online sooner.” — Jacob DeWitte, Oklo
- “Plutonium-based fuels and reprocessing have a poor track record when introduced in civilian nuclear energy programs,” — Ernest Moniz, Former Energy Secretary
- “The transfer of weapons-usable plutonium to private industry would increase the risk of nuclear weapons proliferation, including to rogue states or terrorists,” — Ed Markey, U.S. Senator (letter)
What’s Next
DOE will keep negotiations while reviewing security, logistics and NRC licensing. Allocation of up to 20 t could occur later in 2026, pending final approvals for the Savannah River plant. The NRC’s safety review will assess radiation protection, safeguards against theft, and environmental impact before licensing any fuel-fabrication activities.
