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Nuclear Regulatory Commission.
The U.S. Nuclear Regulatory Commission (NRC) staff is making a finding of no significant impact (FONSI) for a proposed issuance of an exemption in response to a February 28, 2025 request, as supplemented by letters dated April 7, and April 29, 2025, for the proposed Kemmerer Power Station Unit 1 (Kemmerer 1) facility. Specifically, TerraPower, LLC (TerraPower), on behalf of its wholly-owned subsidiary US SFR Owner, LLC (USO), requested an exemption that would modify a portion of the definition of construction applicable to the prohibition on construction of production and utilization facilities without an NRC license for the proposed Kemmerer 1. If granted, this exemption would allow the driving of piles, subsurface preparation, placement of backfill, concrete, or permanent retaining walls within an excavation, installation of foundations, or in-place assembly, erection, fabrication or testing, which are for structures, systems, and components (SSCs) classified as non-safety-related with no special treatment (NST) the failure of which could cause a reactor scram or actuation of a safety-related system that are located on the proposed Kemmerer 1 energy island prior to receipt of a construction permit (CP) and without a limited work authorization. The NRC staff is issuing a final Environmental Assessment (EA) and FONSI associated with the proposed exemption request.
The EA and FONSI referenced in this document are available on May 7, 2025.
Please refer to Docket ID NRC-2024-0078 when contacting the NRC about the availability of information regarding this document. You may obtain publicly available information related to this document using any of the following methods:
- Federal Rulemaking Website: Go to https://www.regulations.gov and search for Docket ID NRC-2024-0078. Address questions about Docket IDs in Regulations.gov to Bridget Curran; telephone: 301-415-1003; email: [email protected]. For technical questions, contact the individual listed in the FOR FURTHER INFORMATION CONTACT section of this document.
- NRC's Agencywide Documents Access and Management System (ADAMS): You may obtain publicly available documents online in the ADAMS Public Documents collection at https://www.nrc.gov/reading-rm/adams.html. To begin the search, select “Begin Web-based ADAMS Search.” For problems with ADAMS, please contact the NRC's Public Document Room (PDR) reference staff at 1-800-397-4209, at 301-415-4737, or by email to [email protected]. For the convenience of the reader, instructions about obtaining materials referenced in this document are provided in the “Availability of Documents” section.
- NRC's PDR: The PDR, where you may examine and order copies of publicly available documents, is open by appointment. To make an appointment to visit the PDR, please send an email to [email protected] or call 1-800-397-4209 or 301-415-4737, between 8 a.m. and 4 p.m. eastern time (ET), Monday through Friday, except Federal holidays.
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