The U.S. Department of Energy is moving to address the long-standing challenge of managing Cold War-era plutonium stockpiles by engaging private sector innovators. In a strategic shift, the government has selected five nuclear startups to enter negotiations for the potential use of surplus plutonium in next-generation nuclear reactors. This initiative aims to repurpose a portion of the approximately 100 tons of radioactive material currently held in high-security storage, specifically targeting 34 tons previously identified for disposal.

The selected companies—Oklo, Standard Nuclear, Shine Technologies, Flibe Energy, and Exodys Energy—are exploring various methods to integrate this material into their reactor designs. For instance, Oklo is developing technology capable of running on both traditional uranium and plutonium, while Exodys Energy is focusing on mixed oxide (MOX) fuel, which blends uranium with plutonium. Flibe Energy is also working on reactors designed to utilize plutonium and other fission by-products.

This move comes as the administration seeks to manage the material’s significant environmental footprint, given that plutonium has a half-life of approximately 24,000 years. The transition involves notable figures in the energy sector; Energy Secretary Chris Wright, who previously served on Oklo’s board, has divested his shares, and Sam Altman has also stepped down from his former role as Oklo’s board chair. While the technology offers a potential solution for the material’s long-term storage, the plan faces scrutiny regarding the security risks of transporting and utilizing material originally intended for nuclear weapons.

Moving forward, the startups must navigate complex negotiations with the government regarding the safe transportation and rigorous security protocols required for handling such sensitive material. While some experts argue that the material should be permanently disposed of to avoid long-term liability, the push to convert weapons-grade isotopes into a viable energy source represents a significant pivot in national energy and waste management policy.