Overview
- The DOE Idaho Operations Office approved the Preliminary Documented Safety Analysis (PDSA) for Oklo’s Aurora powerplant at Idaho National Laboratory on Thursday, June 11, 2026, validating the project’s hazard and accident analyses, safety controls, and key design commitments.
- The approval is a milestone in the DOE Reactor Pilot Program authorization pathway that gives Oklo a way to gain early operating experience under DOE rules while the company continues to pursue full NRC commercial licensing.
- Aurora‑INL will use recovered metallic fuel from the Experimental Breeder Reactor‑II for its initial assemblies and will be supported by Oklo’s Aurora Fuel Fabrication Facility, whose PDSA was approved in December 2025.
- Oklo has recently strengthened its engineering team by closing the ARMEC acquisition on June 4, 2026, and is also negotiating to use surplus plutonium as a temporary bridge fuel while U.S. HALEU supply chains and fabrication capacity scale up.
- The DOE approval does not replace NRC licensing or remove risks on fuel supply, construction financing, and schedule, but it prompted a modest market reaction with Oklo shares rising in premarket trading on the news.