Oklo gets DOE startup nod for Groves isotope test reactor

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Go back to Oklo gets DOE startup nod for Groves isotope test reactor

Oklo Receives U.S. Department of Energy Startup Authorization for Groves Reactor, Clearing Way for Fuel Loading and First Criticality

July 23, 2026 4:30 PM EDT

The U.S. Department of Energy (DOE) startup authorization allows Oklo to load nuclear fuel, conduct startup testing, and proceed toward first criticality.

In just over 10 months, Oklo progressed from groundbreaking to receiving DOE startup authorization for its first reactor at the Groves site.

During that period, Oklo built the reactor facility, established the operating organization, qualified personnel, implemented nuclear programs and procedures, procured fuel and major equipment from commercial suppliers, and completed the DOE authorization process.

The Groves low-power test reactor will demonstrate reactor operations that support Oklos plans for commercial-scale domestic... More