ML26033A251
| ML26033A251 | |
| Person / Time | |
|---|---|
| Site: | 05000614, 99902117 |
| Issue date: | 02/02/2026 |
| From: | O'Connor C Long Mott Energy |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| Shared Package | |
| ML26033A250 | List: |
| References | |
| 2026-PLM-NRC-003 | |
| Download: ML26033A251 (0) | |
Text
Long Mott Energy Long Mott Energy, LLC 221 H. H. Dow Way Midland, MI 48674 2 February 2026 2026-PLM-NRC-003 Docket No. 50-614 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
Subject:
Supplement #6 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) 6)
Long Mott Energy, LLC, 2025, Supplement #5 to the Preliminary Safety Analysis Report for the Long Mott Generating Station Construction Permit Application, 2025-PLM-NRC-017, December 17, 2025 (ML25351A147)
Long Mott Energy, LLC (LME), hereby submits the enclosed Supplement #6 to the Preliminary Safety Analysis Report (PSAR) for the Long Mott Generating Station (LMGS) Construction Permit Application. As described in Attachment 4,Planned Submittals of Supporting Site-Information for LMGS Preliminary Safety Analysis Report Chapter 2, of the cover letter to Reference 1, LME Ž plans to submit additional site-the Nuclear Regulatory Commission (NRC) to support the descriptions of LMGS site geotechnical, seismological, and hydrological characteristics and associated data collection, testing, analysis, and modeling that are contained in Section 2.4 and Section 2.5 of the LMGS PSAR. The NRC, as described in Reference 2, noted that LME expected this additional site-to.
Long Mott Energy Long Mott Energy, LLC 221 H. H. Dow Way Midland, MI 48674 Accordingly, this Supplement #6 includes redlined markups of certain Subsections to PSAR Chapter 2.4,Hydrology, based on additional site-and analyses, as presented in Enclosures 1 thru 3. Additional details for each Enclosure are described below:
x : Provides a redlined markup of Subsection 2.4.12, Groundwater, and describes additional site-.
Revisions to Subsection 2.4.12.1.4, Site-F Hydrogeological Parameters, 2.4.12.2.4.2, Geotechnical Parameters, 2.4.12.3.1.1, Hydrogeologic Conceptual Site Model, and 2.4.12.3.1.2.1, Description of Hydro-lithologic Units, include updates related to site-and groundwater model recalibration.
Editorial markups are also noted.
x : Provides a redlined markup of Subsection 2.4.13, Accidental Releases of
[(@. Revisions to Subsection 2.4.13 incorporate site-the recalibrated groundwater model referenced in. Editorial changes are also noted.
x : Provides a redlined markup of PSAR Table 2.0-1, Long Mott Generating Station (LMGS) Site Characteristicscontained in the updates of Enclosures 1 and 2.
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 2nd day of February 2026.
Sincerely, Charles R. OConnor Sr. Director, Engineering and Projects Long Mott Energy, LLC
Long Mott Energy Long Mott Energy, LLC 221 H. H. Dow Way Midland, MI 48674
Enclosures:
Surface Waters (public) : PSAR Table 2.0-1, Long Mott Generating Station (LMGS) Site Characteristics (public) 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