Background: The Executive Order
On June 8, 2026, President Donald Trump signed Executive Order 14302, titled "Reinvigorating the Nuclear Base." The order directs the U.S. Department of Energy (DOE) to transfer 20 metric tons (44,000 pounds) of weapons-grade plutonium to private companies for use as nuclear reactor fuel. This marks the first time the U.S. government has made such material available to the private sector, breaking with decades of bipartisan policy aimed at preventing the spread of weapons-usable nuclear materials.
Scale of the Plutonium
To understand the magnitude, consider that the Fat Man bomb dropped on Nagasaki contained approximately 13.6 pounds of plutonium, leveling about two square miles. The 44,000 pounds under discussion is enough to build roughly 2,000 such bombs, each capable of devastating a city center. The material would be distributed to five nuclear energy startups, none of which have yet built a commercial reactor capable of using this type of fuel.
Senator Markey's Opposition
Senator Edward J. Markey (D-MA), co-Chair of the bicameral Nuclear Weapons and Arms Control Working Group, has been a vocal critic. In a June 2, 2026 letter to President Trump, Markey urged cancellation of the plan, citing serious security concerns, proliferation risks, and questionable economics. He also highlighted a conflict of interest: Secretary of Energy Chris Wright previously served on the board of Oklo, one of the companies slated to receive plutonium. Markey argued that the plan undermines long-standing U.S. nuclear security policy and makes little economic sense.
Technical and Safety Challenges
Weapons-grade plutonium contains a high concentration of the isotope Pu-239, which is not typically used in commercial reactors. No existing U.S. nuclear power plant is designed to run on this material. The startups involved would need to develop and license new reactor designs, a process that could take years and cost billions. Critics worry that the rush to utilize this plutonium could cut corners on safety and security protocols.
Proliferation Risks
International nonproliferation experts have expressed alarm. The transfer of weapons-grade material to private entities could set a dangerous precedent, potentially inspiring other nations to follow suit. The material could be vulnerable to theft or diversion by terrorist groups. The U.S. has historically led efforts to minimize the civilian use of highly enriched uranium and plutonium to reduce proliferation risks.
Economic Viability
The economic case for using weapons-grade plutonium in power reactors is weak. The cost of converting the material into a suitable fuel form, coupled with the need for specialized reactors, makes it far more expensive than conventional low-enriched uranium fuel. Additionally, the DOE would likely incur significant costs for security and transportation. Markey's letter questioned why taxpayers should bear these costs for unproven technology.
Conflict of Interest
Secretary of Energy Chris Wright's previous role on Oklo's board raises ethical questions. Oklo is one of the five startups that may receive plutonium. Critics argue that Wright should recuse himself from decisions involving the company, but no such recusal has been announced. This has led to calls for an investigation by the Office of Government Ethics.
Historical Context
For over 50 years, U.S. policy has opposed the commercial use of plutonium and the spread of technologies that could facilitate nuclear weapons proliferation. The Trump administration's move represents a dramatic reversal. Past administrations, both Republican and Democratic, have maintained strict controls on weapons-grade materials, deeming them too dangerous for civilian hands.
Industry Response
The five startups involved have defended the plan, arguing that it could help jumpstart advanced nuclear technologies and reduce reliance on fossil fuels. They claim that new reactor designs can safely consume plutonium while generating electricity. However, independent experts remain skeptical, noting that no such reactor has been licensed or built in the U.S.
Next Steps
The DOE has not yet finalized the transfer agreements. Senator Markey and other lawmakers have promised to hold hearings and introduce legislation to block the plan. The nuclear industry watchdog groups are preparing legal challenges. The debate is likely to intensify as the 2026 midterm elections approach.
This article is based on reporting by CleanTechnica. Read the original article.
Originally published on cleantechnica.com
