ML25351A148
| ML25351A148 | |
| Person / Time | |
|---|---|
| Site: | 05000614, 99902117 |
| Issue date: | 12/17/2025 |
| From: | O'Connor C Long Mott Energy |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| Shared Package | |
| ML25351A147 | List: |
| References | |
| 2025-PLM-NRC-017 | |
| Download: ML25351A148 (0) | |
Text
Long Mott Energy Long Mott Energy, LLC 221 H. H. Dow Way Midland, MI 48674 General Business 17 December 2025 2025-PLM-NRC-017 Docket No. 50-614 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
Subject:
Supplement #5 to the Preliminary Safety Analysis Report for the Long Mott Generating Station Construction Permit Application
References:
1)
Long Mott Energy, LLC, 2025, Long Mott Generating Station Construction Permit Application, 2025-PLM-NRC-003, March 31, 2025 (ML25090A057) 2)
U.S. Nuclear Regulatory Commission, 2025, Acceptance for Docketing of the Long Mott Generating Station Construction Permit Application, May 12, 2025 (ML25115A247) 3)
Long Mott Energy, LLC, 2025, Supplement #2 to the Preliminary Safety Analysis Report for the Long Mott Generating Station Construction Permit Application, 2025-PLM-NRC-013, November 20, 2025 (ML25324A307) 4)
Long Mott Energy, LLC, 2025, Supplement #3 to the Preliminary Safety Analysis Report for the Long Mott Generating Station Construction Permit Application, 2025-PLM-NRC-015, December 4, 2025 (ML25338A310) 5)
Long Mott Energy, LLC, 2025, Supplement #4 to the Preliminary Safety Analysis Report for the Long Mott Generating Station Construction Permit Application, 2025-PLM-NRC-016, December 12, 2025 (ML25346A256)
Long Mott Energy, LLC (LME), hereby submits the enclosed Supplement #5 to the Preliminary Safety Analysis Report (PSAR) for the Long Mott Generating Station (LMGS) Construction Permit Application.
PSAR Supplement # 2 provided additional site-in PSAR Sections 2.4.2 through 2.4.5 and 2.4.10 (Reference #3). PSAR Supplement #3 (Reference
- 4) provided a redlined markup of PSAR Table 2.0-1, Long Mott Generating Station (LMGS) Site Characteristics the updated information provided in PSAR Supplement #2. PSAR Supplement # 4 provided additional site-geological and seismological characteristics for the LMGS site, in PSAR Section 2.5 (Reference #5). This PSAR Supplement #5 (Enclosure 1) provides a redlined markup of PSAR Table 6.1-1, Table of Design
F[ŽŽ PSAR supplements described above.
Long Mott Energy Long Mott Energy, LLC 221 H. H. Dow Way Midland, MI 48674 General Business For clarity, LME still intends to submit additional site-
2.4.12 (related to groundwater) by the end of second quarter 2026 and will submit an update to PSAR Table 2.0-1 with this future supplement.
site-s information are expected to be included in a future revision of the entire Reference 1.
This letter contains no commitments. Should you have any questions or require additional information, please contact Jessica Maddocks at jmaddocks@x-energy.com.
I declare under penalty of perjury that the foregoing is true and accurate. Executed on this 17th day of December 2025.
Sincerely, Charles R. OConnor Sr. Director, Engineering and Projects Long Mott Energy, LLC
Enclosures:
- 1. Redlined markup of PSAR Table 6.1-1, Table of Design Basis Hazard Levels
Long Mott Energy Long Mott Energy, LLC 221 H. H. Dow Way Midland, MI 48674 General Business cc:
Long Mott Energy, LLC:
Kreshka Young Charles OConnor Mark Feltner Wayne Blaylock Edward Stones Evan Blankenau U.S. Department of Energy:
Tim Beville David Yarwood X Energy, LLC:
David Bannister Dragan Popovic Steve Miller David Royer Rob Taylor Steve Vaughn Jessica Maddocks U.S. Nuclear Regulatory Commission:
Alissa Neuhausen Adrian Muniz Ondra Dukes Denise McGovern Richard Rivera John Monninger, NRC Region IV