ML25325A236

Memorandum - Summary of July 8, 2025, Meeting to Provide Clarity on Draft Structural RAIs for the TRISO-X License Application

ML25325A236
Person / Time
Site:	Triso-X
Issue date:	12/09/2025
From:	Matt Bartlett NRC/NMSS/DFM/FFLB
To:	Tekia Govan NRC/NMSS/DFM/FFLB
Shared Package
ML25325A233	List: ML25325A236
References
EPID: L-2022-PMP-0005
Download: ML25325A236 (0)

Text

OFFICIAL USE ONLY - SECURITY-RELATED INFORMATION OFFICIAL USE ONLY - SECURITY-RELATED INFORMATION UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 MEMORANDUM TO:

Tekia Govan, Acting Chief Fuel Facility Licensing Branch Division of Fuel Management Office of Nuclear Material Safety and Safeguards FROM:

Matt Bartlett, Senior Project Manager Fuel Facility Licensing Branch Division of Fuel Management Office of Nuclear Material Safety and Safeguards

SUMMARY

OF JULY 8, 2025, MEETING TO PROVIDE CLARITY ON DRAFT SET 18 STRUCTURAL SAFETY REQUESTS FOR ADDITIONAL INFORMATION FOR THE TRISO-X, LLC, LICENSE APPLICATION (ENTERPRISE PROJECT IDENTIFIER NUMBER L-2022-PMP-0005)

The U.S. Nuclear Regulatory Commission (NRC) staff conducted a closed, virtual, meeting with TRISO-X, LLC (TRISO-X), on July 8, 2025, to discuss the structural Set-18 requests for additional information (RAIs) related to the TRISO-X license. The TRISO-X application for a new fuel fabrication facility located in Oak Ridge, Tennessee was submitted via letter dated April 5, 2022 (Agencywide Documents Access and Management System Accession No. ML22101A200) and supplemented by letters dated October 13, 2022, (ML22286A144) and November 4, 2022, (ML22308A251) and revised license application submitted by letters dated December 30, 2024, (ML24365A254) and January 31, 2025, (ML25031A449).

The purpose of the meeting was to resolve TRISO-Xs questions and ensure alignment on the information needed to resolve the RAIs. During the meeting, the participants reviewed each draft RAI in detail. The topics included meteorological data, extreme temperatures, precipitation, wind and tornado design criteria, and missile hazards. TRISO-X requested the NRC state in the RAIs if the information being requested should be included in the license application, in which the staff agreed.

CONTACT: Matt Bartlett, NMSS/DFM 301-415-7154 The enclosures transmitted herewith contain Security Related Information.

When separated from the enclosures, this document is decontrolled.

December 9, 2025 Signed by Bartlett, Matthew on 12/09/25

OFFICIAL USE ONLY - SECURITY-RELATED INFORMATION T. Govan 2

OFFICIAL USE ONLY - SECURITY-RELATED INFORMATION The NRC staff stated that certain data located on the portal should be included in the license application to support regulatory findings. The discussion also addressed the methodology used to determine design-based events, including the return periods for tornadoes and the justification for selected wind speeds. The parties discussed how to appropriately credit the building structure in accident scenarios and how that decision affects the analysis of natural phenomena hazards.

The key takeaways from the meeting included the agreement to hold additional discussions regarding protection against natural phenomena hazards and the need to demonstrate compliance with the performance requirements in Title 10 of the Code of Federal Regulations (10 CFR) Section 70.61 and the baseline design criteria in 10 CFR 70.64. Both parties agreed that an in-person meeting would be beneficial once draft responses and the integrated safety analysis (ISA) RAIs are available. An onsite audit was agreed to be held on August 19, 2025.

The meeting participants included the following individuals:

NRC staff:

Matt Bartlett (Licensing Project Manager),

Steve Poy (Licensing Project Manager),

Juan Lopez (Structural Safety Tech Reviewer),

Samantha Lav (Licensing Branch Chief), and Lisa Regner (Technical Branch Chief).

TRISO-X staff:

Jennifer Wheeler (Vice President of Regulatory Affairs),

Burns Cunningham, (Licensing Engineer), and Bob Maurer, (Licensing Engineer and ISA Team Lead).

Docket No.: 07007027

Enclosures:

1. Summary of Meeting July 8, 2025, Regarding Structural Safety Draft RAIs for TRISO-X

2. Draft Set 18 Structural Safety RAIs for TRISO-X

ML25325A233(pkg, non-public), ML25325A236 (memo),

ML25325A234 (encl 1, non-public), ML25325A235 (encl 2, non-public)

OFFICE NMSS/DFM NMSS/DFM NMSS/DFM NMSS/DFM NAME MBartlett JGoodridge TGovan MBartlett DATE 12/02/25 12/03/25 12/05/25 12/09/25