ML25232A002
| ML25232A002 | |
| Person / Time | |
|---|---|
| Site: | Kemmerer File:TerraPower icon.png |
| Issue date: | 08/20/2025 |
| From: | George Wilson TerraPower |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| TP-LIC-LET-0415 | |
| Download: ML25232A002 (1) | |
Text
15800 Northup Way, Bellevue, WA 98008 www.TerraPower.com P. +1 (425) 324-2888 F. +1 (425) 324-2889 August 20, 2025 TP-LIC-LET-0415 Docket Number 50-613 U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 ATTN: Document Control Desk
Subject:
Transmittal of Kemmerer Power Station Unit 1 Macro-Corridor Update TerraPower, LLC (TerraPower) on behalf of US SFR Owner, LLC (USO), a wholly owned subsidiary of TerraPower, submits this letter to provide an update to the Kemmerer Power Station Unit 1 macro-corridor. The projects utility corridor is being modified to avoid construction that would adversely impact the area of cultural resource site 48LN8940. contains updated Kemmerer Power Station Unit 1 Environmental Report Figures 2.1-1, 2.1-10, 2.6-1, and 2.6-2. The offsite areas comprising the direct APE for the project is now approximately 578 acres (234 hectares), increased from 511 acres (207 hectacres) macro-corridor within which the water supply line from the Naughton Power Plant and the two transmission lines to the switchyard at the Naughton Power Plant will be located. The Project took steps to ensure there is sufficient space to route the water pipeline and transmission lines without encroaching on contributing elements of Site 48LN8940. The site lies within approximately 181 feet of the edge of the survey area. The eastern boundary of the macro-corridor was extended to the boundary of the survey area.
The portion of Site 48LN8940 outside the original direct area of potential effects (APE) was tested using auger test probes to determine if that portion of the site is contributing to the sites NRHP eligibility. The tested portion of the site was found to be non-contributing and the design of the electric transmission and water pipeline rights of way can proceed in that area without adverse effect to the site. An exclusion area was established on the west side of the macro-corridor to prevent encroaching on the contributing elements of historic property.
The changes increased the area of the co-located macro-corridor from 315 to 381 acres (127 hectares to 154 hectares), a difference of 66 acres (27 hectares).
August 20, 2025 Page 2 of 2 Since the project can avoid adverse effects to the two historic sites, established exclusion areas, and will implement measures to address unanticipated discoveries, the onsite direct impacts to cultural and historic resources are anticipated to be SMALL to MODERATE.
If you have any questions regarding this submittal, please contact Nick Kellenberger at nkellenberger@terrapower.com.
I declare under penalty of perjury that the foregoing is true and accurate.
Executed on August 20, 2025.
Sincerely, George Wilson Senior Vice President of Regulatory Affairs TerraPower, LLC
Enclosure:
- 1. Kemmerer Power Station Unit 1 Macro-Corridor Updated Figures 2.1-1, 2.1-10, 2.6-1, and 2.6-2 cc:
Mallecia Sutton, NRC Josh Borromeo, NRC Patricia Vokoun, NMSS Daniel Barnhurst, NMSS Nathan Howard, DOE
TP-LIC-LET-0415 ENCLOSURE 1 Kemmerer Power Station Unit 1 Macro-Corridor Updated Figures 2.1-1, 2.1-10, 2.6-1, and 2.6-2