[Federal Register Volume 90, Number 203 (Thursday, October 23, 2025)]
[Notices]
[Pages 48507-48508]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2025-19648]
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NUCLEAR REGULATORY COMMISSION
[Docket No. 50-613; NRC-2024-0078]
US SFR Owner, LLC; Kemmerer Power Station, Unit 1; Final
Environmental Impact Statement
AGENCY: Nuclear Regulatory Commission.
ACTION: Notice; issuance.
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SUMMARY: The U.S. Nuclear Regulatory Commission (NRC), in cooperation
with the U.S. Department of Energy (DOE), is issuing a final
environmental impact statement (EIS), NUREG-2268, ``Environmental
Impact Statement for the Construction Permit Application for Kemmerer
Power Station, Unit 1: Final
[[Page 48508]]
Report.'' The NRC is issuing this final EIS as part of its review of
the application submitted by TerraPower, LLC (TerraPower) on behalf of
US SFR Owner, LLC (USO), a wholly owned subsidiary of TerraPower, for a
construction permit (CP) for a Natrium advanced reactor at a site in
Lincoln County, Wyoming, designated as Kemmerer Power Station, Unit 1
(Kemmerer Unit 1). USO plans to build and operate Kemmerer Unit 1 to
demonstrate the Natrium advanced reactor while ultimately replacing
electricity generation capacity in the PacifiCorp service area
following planned retirement of existing coal-fired facilities. The
final EIS evaluates the environmental impacts of the proposed action of
issuing a CP that would allow the construction of Kemmerer Unit 1, as
well as the environmental impacts of alternatives to the proposed
action.
DATES: The final EIS is available as of October 23, 2025.
ADDRESSES: 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 ADAMS Public 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]. The final EIS is available in ADAMS under
Accession No. ML25287A017. The ADAMS accession number for each other
document referenced (if it is available in ADAMS) is provided the first
time that it is mentioned in this document.
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, Monday through Friday, except Federal
holidays.
Project Website: The final EIS will also be available
online at the Kemmerer Unit 1 project website at https://www.nrc.gov/reactors/new-reactors/advanced/who-were-working-with/applicant-projects/terrapower.html.
FOR FURTHER INFORMATION CONTACT: Patricia Vokoun, Office of Nuclear
Material Safety and Safeguards, U.S. Nuclear Regulatory Commission,
Washington, DC 20555-0001; telephone: 301-415-3470; email:
[email protected].
SUPPLEMENTARY INFORMATION:
I. Background
By letter dated March 28, 2024 (ADAMS Package Accession No.
ML24088A059), TerraPower on behalf of USO, a wholly owned subsidiary of
TerraPower, submitted to the NRC pursuant to section 103 of the Atomic
Energy Act of 1954, as amended, and part 50 of title 10 of the Code of
Federal Regulations (10 CFR), ``Domestic Licensing of Production and
Utilization Facilities,'' an application for a CP that would allow the
construction of Kemmerer Unit 1 in Lincoln County, Wyoming, as part of
participation in DOE's Advanced Reactor Demonstration Program. The
proposed facilities would house one 840-megawatt thermal, pool-type,
sodium-cooled fast reactor connected to a molten salt energy storage
system that enables variable energy supply up to 500 megawatts electric
net. This submission initiated the proposed Federal action of
determining whether to issue the requested CP. The CP application was
supplemented on May 2, 2024 (ADAMS Accession Nos. ML24123A242 and
ML24123A243) and on May 9, 2024 (ADAMS Accession No. ML24130A181). A
notice of receipt and availability of the CP application was published
in the Federal Register (FR) on May 14, 2024 (89 FR 42004). A notice of
intent to prepare an EIS and to conduct a scoping process was published
on June 12, 2024 (89 FR 49917).
As set forth in 10 CFR 51.20(b), issuance of a CP to construct a
nuclear power reactor is an action that requires an EIS. This notice is
being published in accordance with the National Environmental Policy
Act of 1969, as amended (NEPA), and the NRC's regulations implementing
NEPA at 10 CFR part 51, ``Environmental Protection Regulations for
Domestic Licensing and Related Regulatory Functions.'' In addition,
pursuant to section 800.8(c) of title 36 of the Code of the Federal
Regulations (36 CFR), the NRC used the process and documentation for
the preparation of the EIS to comply with section 106 of the National
Historic Preservation Act of 1966, as amended, in lieu of the
procedures set forth in 36 CFR 800.3 through 800.6.
A notice of availability of and request for comment on the draft
EIS was published in the Federal Register on June 20, 2025 (90 FR
26333). The public comment period on the draft EIS ended on August 4,
2025, and the comments received on the draft EIS are addressed in the
final EIS.
II. Discussion
As discussed in the final EIS, after weighing the environmental,
economic, technical, and other benefits against environmental and other
costs, and considering reasonable alternatives, the recommendation is,
unless safety issues mandate otherwise, that the NRC issue the
requested CP to USO. This recommendation is based on the CP
application, information gathered during the environmental audit, and
responses to requests for clarifying information; consultation with
Federal, State, Tribal, and local agencies; the independent
environmental review and assessment summarized in the final EIS; and
consideration of public comments received during the scoping process
and on the draft EIS. In addition, no environmentally preferrable
alternatives that meet the purpose and need for the proposed action
were identified; therefore, there is no obviously superior alternative
to the proposed action from an environmental perspective.
Dated: October 20, 2025.
For the Nuclear Regulatory Commission.
Kimyata Savoy,
Acting Deputy Director, Division of Rulemaking, Environmental, and
Financial Support, Office of Nuclear Material Safety and Safeguards.
[FR Doc. 2025-19648 Filed 10-22-25; 8:45 am]
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