Oklo Inc. proposes to construct and operate the Groves-1 zero-power critical assembly reactor facility.
Office of NEPA Policy and Compliance
June 15, 2026
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Oklo Inc. proposes to construct and operate the Groves-1 zero-power critical assembly reactor facility. The purpose of building this facility is to demonstrate Oklo’s ability to safely design and construct a critical assembly, and to gain experience for future reactor development projects supporting domestic isotope production. Future facility developments can produce over 40 different high-value radioisotopes for medical, industrial, space, defense, and research. For purposes of DOE authorization under NEPA, the proposed Federal action is DOE’s authorization to take possession of nuclear fuel at the Groves-1 facility and operate the reactor. The operational phase of the facility is set to begin by July 2026 and be complete by the end of 2026. The reactor core will be brought to criticality with low heat generation; the maximum power level is 100 watts. The Groves-1 facility is located on the Proto-Town project site in Caldwell County, Texas. The facility is approximately 0.2 miles northwest of Mineral Springs Rd and approximately 0.1 mile southwest of West Fork Rd.