ML25015A127
| ML25015A127 | |
| Person / Time | |
|---|---|
| Site: | 99902100 |
| Issue date: | 03/07/2025 |
| From: | Brusselmans R NRC/NRR/DANU/UAL1 |
| To: | George Wilson TerraPower |
| Roel Brusselmans, NRR/DANU | |
| Shared Package | |
| ML25015A124 | List: |
| References | |
| EPID L-2024-TOP- 0006, NAT-4950 | |
| Download: ML25015A127 (3) | |
Text
March 7, 2025 Mr. George Wilson Vice President, Regulatory Affairs TerraPower, LLC 15800 Northup Way Bellevue, WA 98008
SUBJECT:
TERRAPOWER, LLC. AUDIT
SUMMARY
REPORT, TOPICAL REPORT NAT-4950, INSTRUMENTATION & CONTROL ARCHITECTURE AND DESIGN BASIS TOPICAL REPORT, REVISION 1 (EPID NO. L-2024-TOP- 0006)
Dear Mr. Wilson:
By letter dated March 7, 2024, TerraPower, LLC (TerraPower) submitted topical report (TR)
NAT-4950 Revision 1, Instrumentation & Control Architecture and Design Basis Topical Report (Agencywide Documents Access and Management System (ADAMS) Accession No. ML24068A186) to the U.S. Nuclear Regulatory Commission (NRC) staff. The TR describes TerraPowers overall architecture related to the instrumentation and control (I&C) design. It also addresses the associated design basis and the process for I&Cs relationship to lines of defense, structure, system, and component classification, and I&C functions basis and allocation to individual systems. On April 15, 2024, the NRC staff found that the material presented in the TR provides technical information in sufficient detail to enable the NRC staff to conduct a detailed technical review (ML24101A204).
Enclosed is a summary report on the regulatory audit conducted by the NRC staff in connection with its ongoing review of the TR. The audit followed the plan dated June 24, 2024 (ML24163A003).
The audit summary report does not make any licensing conclusions or findings, but it is part of the administrative record of the NRC staffs review of the TR and may provide information supporting the NRC staffs safety evaluation. No requests for additional information were identified as part of the audit and there are no open items resulting from the audit. The report constitutes the final report on the audit.
If you have any questions, regarding this matter, please contact me at (301) 415-0829 or via email at Roel.Brusselmans@nrc.gov.
Sincerely, Roel Brusselmans, Project Manager Advanced Reactor Licensing Branch 1 Division of Advanced Reactors and Non-Power Production and Utilization Facilities Office of Nuclear Reactor Regulation Project No.: 99902100
Enclosure:
As stated cc: TerraPower Natrium via GovDelivery
Package: ML25015A124 Letter: ML25015A127 Public
Enclosure:
ML25015A128 NRR-106 OFFICE NRR/DANU/UAL1:PM NRR/DANU/UAL1:LA NRR/DANU/UTB2:BC NAME RBrusselmans DGreene FSacko DATE 12/30/2024 1/23/2025 1/2/2025 OFFICE NRR/DANU/UAL1:BC NRR/DANU/UAL1:PM NAME JBorromeo RBrusselmans DATE 2/25/2025 3/7/2025