Overview
- The U.S. Department of Energy approved the Documented Safety Analysis for Oklo’s Groves Isotope Test Reactor, a decision reported Wednesday that confirms the facility’s final safety basis before startup.
- With the DSA approved, Groves now enters DOE’s final pre-startup readiness review that must authorize fuel receipt, core loading, and startup testing before Oklo can pursue first criticality targeted for July 2026.
- Groves is an isotope-production test reactor sited on privately owned land in Lockhart, Texas, and it will not generate electricity but is meant to make medical, research, industrial, space, and national-security radioisotopes.
- The market reacted to the news with OKLO shares rising about 4–5% in premarket trading, and the company has been building supply and manufacturing ties such as a HALEU letter of intent with Centrus and fuel-recycling MOUs.
- Oklo’s longer-term power project, the Aurora fast-fission design at Idaho National Laboratory, has a DOE preliminary safety nod but still faces separate challenges including commercial NRC licensing, HALEU fuel availability, and financing.