ML25351A004
| ML25351A004 | |
| Person / Time | |
|---|---|
| Site: | 99902079 |
| Issue date: | 01/09/2026 |
| From: | Alissa Neuhausen NRC/NRR/DANU/UAL2 |
| To: | Schoedel A Westinghouse |
| Vechioli-Feliciano L | |
| Shared Package | |
| ML25351A006 | List: |
| References | |
| EPID L-2024-TOP-0020 | |
| Download: ML25351A004 (0) | |
Text
OFFICIAL USE ONLY - PROPRIETARY INFORMATION OFFICIAL USE ONLY - PROPRIETARY INFORMATION UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Mr. Anthony Schoedel, Director eVinci Licensing & Regulatory Affairs Westinghouse Electric Company, LLC.
51 Bridge Street Pittsburgh, PA 15223
SUBJECT:
WESTINGHOUSE ELECTRIC COMPANY, LLC. - FINAL SAFETY EVALUATION FOR TOPICAL REPORT EVR-LIC-RL-002-P/NP, WESTINGHOUSE NUCLEAR DESIGN METHODOLOGY (EPID: L-2024-TOP-0020)
Dear Mr. Schoedel:
By letter dated May 15, 2024 (Agencywide Documents Access and Management System, Accession Number, ML24137A245), Westinghouse Electric Company, LLC. (Westinghouse) submitted the EVR-LIC-RL-002-P/NP, Nuclear Design Methodology Topical Report, Revision 0, for the U.S. Nuclear Regulatory Commission (NRC) staffs review.
The NRC staff's final Safety Evaluation (SE) for the topical report (TR) is enclosed. Enclosure 1 contains proprietary information and access to this document will be controlled consistent with the regulations in Title10 of the Code of Federal Regulations, Section 2.390, Public inspections, exemptions, requests for withholding. Enclosure 2, is the redacted version of the SE and will be made publicly available.
The NRC staff has determined that Westinghouses subject TR provides an acceptable methodology for steady-state and depletion analysis of the eVinci' microreactor because: (1) the underlying calculational methods and techniques used in the model are acceptable approaches to represent the physical phenomena of interest to be modeled, (2) the discussion includes appropriate consideration of model and design uncertainty, and (3) subsequent development, finalization, verification, validation, and implementation of the described methods and models will be completed in accordance with applicable technical knowledge and expertise.
Accordingly, the NRC staff concludes that Westinghouses subject TR is suitable for referencing in future licensing applications for the eVinciTM microreactor, subject to the limitations and conditions included in the Limitations and Conditions, section of the SE. The NRC staff to this letter contains proprietary information. When separated from the Enclosure, this letter is DECONTROLLED.
January 9, 2026
OFFICIAL USE ONLY - PROPRIETARY INFORMATION A. Schoedel OFFICIAL USE ONLY - PROPRIETARY INFORMATION requests that Westinghouse submit an accepted proprietary and non-proprietary version of the SE within 3 months of receipt of this letter. The accepted version shall incorporate any revisions to the TR that resulted from the NRC staff's audit (ML25190A670) conducted as part of the TR review. It should also include this letter and the enclosed SE.
If you have any questions regarding this matter, please contact Lucieann Vechioli Feliciano at (301) 415-6035 or via email at Lucieann.VechioliFeliciano@nrc.gov.
Sincerely, Alissa Neuhausen, Chief Advanced Reactor Licensing Branch 2 Division of Advanced Reactors and Non-Power Production and Utilization Facilities Office of Nuclear Reactor Regulation Project No.: 99902079
Enclosures:
As stated cc: Westinghouse eVinci GovDelivery schoedaj@westinghouse.com Signed by Neuhausen, Alissa on 01/09/26
Package: ML25351A006 Letter: ML25351A004 : (Proprietary) ML25351A005 : (Non-Proprietary) ML25351A003
- SE Only NRR-106 OFFICE NRR/DANU/UAL2:PM NRR/DANU/UAL2:LA NRR/DEX/UTB1:BC*
NRR/DANU/UAL2:BC NAME LVechioli CSmith GOberson ANeuhausen DATE 12/15/2025 12/16/2025 12/17/2025 1/9/2026