ML25303A307
| ML25303A307 | |
| Person / Time | |
|---|---|
| Site: | Kemmerer File:TerraPower icon.png |
| Issue date: | 11/06/2025 |
| From: | NRC/NRR/DANU |
| To: | |
| References | |
| Download: ML25303A307 (1) | |
Text
THIS NRC STAFF DRAFT SE HAS BEEN PREPARED AND IS BEING RELEASED TO SUPPORT INTERACTIONS WITH THE ACRS. THIS DRAFT SE HAS NOT BEEN SUBJECT TO FULL NRC MANAGEMENT AND LEGAL REVIEWS AND APPROVALS, AND ITS CONTENTS SHOULD NOT BE INTERPRETED AS OFFICIAL AGENCY POSITIONS.
OFFICIAL USE ONLY - PROPRIETARY INFORMATION 7
DESCRIPTIONS FOR SAFETY-SIGNIFICANT STRUCTURES, SYSTEMS, AND COMPONENTS This chapter of the safety evaluation (SE) describes the staffs review and evaluation of the Kemmerer Unit 1 (KU1) preliminary safety analysis report (PSAR) chapter 7, which contains preliminary descriptions of KU1 safety-significant structures, systems, and components (SSCs).
The applicable regulatory requirements for the evaluation of the descriptions of safety-significant SSCs include:
Title 10 of the Code of Federal Regulations (10 CFR) 50.34, Contents of applications; technical information, paragraph (a), Preliminary safety analysis report, including:
o 10 CFR 50.34(a)(1)(ii);
o 10 CFR 50.34(a)(4);
o 10 CFR 50.34(a)(3)(ii); and o 10 CFR 50.34(a)(3)(iii);
10 CFR 50.35, Issuance of construction permits; and 10 CFR 50.40, Common standards.
General guidance on content of applications for safety-significant SSCs is provided by Nuclear Energy Institute (NEI) 21-07, Technology Inclusive Guidance for Non-Light Water Reactors, Revision (Rev.) 1 (ML22060A190), as endorsed by Regulatory Guide (RG) 1.253, Guidance for a Technology-Inclusive Content-of-Application Methodology to Inform the Licensing Basis and Content of Applications for Licenses, Certifications, and Approvals for Non-Light-Water Reactors, Rev. 0 (ML23269A222). PSAR chapter 7 deviates slightly from this content of application guidance by combining the descriptions of safety-related (SR) SSCs and non-safety-related with special treatment (NSRST) SSCs into a single chapter.
To document the staffs review of PSAR chapter 7, this chapter of the SE is organized into sections and subsections corresponding to each of the major systems identified in the PSAR.
Each major system subsection (e.g., 7.1.1) contains the following elements:
an introduction describing the SSC, any SSC-specific regulatory requirements and guidance, and the applicable principal design criteria (PDC), as described in PSAR section 5.3; an assessment of the preliminary SSC design against the PDC and the safety functions which the SSC supports, as described in PSAR sections 5.3 and 5.2, respectively, and evaluated in the licensing basis event (LBE) analyses in PSAR chapter 3; and an evaluation of the design codes and standards and any special treatments necessary to support the SSCs consistency with the PDC and performance of the safety functions.
For each SSC, the staff reviewed the information provided in the PSAR and verified the SSC met the requirements of 10 CFR 50.34(a), in part, because the PSAR provides the following information:
An overall description of the SSC, its location, and its modes of operation;