Office of Nuclear Energy Celebrates Fifth Advanced Reactor Criticality

Started by Marlin, Aug 06, 2026, 10:33

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Oklo achieved criticality for its Groves Isotope Test Reactor at a facility in Lockhart, Texas. This project, authorized under the Department of Energy Reactor Pilot Program, aims to support the development of commercial reactors for isotope production. The milestone marks the fifth successful reactor startup under this program this summer, demonstrating a rapid timeline for testing first-of-a-kind nuclear technologies.

QuoteOklo's Groves Isotope Test Reactor successfully achieved criticality, becoming the fifth DOE-authorized reactor to go critical this summer.

WASHINGTON — Last night, as part of the U.S. Department of Energy (DOE) Reactor Pilot Program, Oklo's Groves Isotope Test Reactor successfully achieved criticality. The experiment took place at the company's facility in Lockhart, Texas. Groves is the fifth DOE-authorized advanced reactor to achieve criticality this summer, further solidifying America's nuclear comeback.

Read the full article at Energy.gov:
https://www.energy.gov/ne/articles/office-nuclear-energy-celebrates-fifth-advanced-reactor-criticality