Document: NRC Regulatory Guide
Document ID: da2e0703-3488-44b0-b6d0-089aac7cae3d
Document Type: regulatory_guide
Title: Format and Content of Plant-Specific Pressurized Thermal Shock Safety Analysis Reports for Pressurized Water Reactors
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003740028.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.154
CFR Part: 
CFR Title: 

Content:
rized thermal shock (PTS) rule, § 50.61 of 10 CFR Part 50 (July 23, 1985--50 FR 29937), requires collection and reporting of material properties data, analyses of flux reduction options, and detailed plant-specific PTS risk analyses for those plants that reach the screening criterion based on RTNDT,* as specified in the rule, during the term of the operating 1 icense. The regulatory guide addresses the detailed plant-specific risk analysis requirement, providing recommendations regarding how licensees should perform and how the NRC staff should review those analyses. Neither the PTS rule nor the regulatory guide requires specific corrective actions. The guide merely provides guidance for the performance of the analyses required by the rule to identify and select necessary corrective actions. There- fore, i n accordance w i t h the Commission's Regulatory Analysis Guide1 ines (NUREG/ BR-0058, Revision l), this regulatory analysis does not provide extensive and detai led assessment of required, specific corrective actions. The background material, nature of the problem, objectives, and costs, etc., of the PTS rule's requirements are covered in the regulatory analysis prepared as part of the rulemaking proceeding (Enclosure B to SECY-83-288, Proposed Pressurized Thermal Shock (PTS) Rule, July 15, 1983, and Enclosure D to SECY-85-60, Fi nal Pressurized Thermal Shock (PTS) Rul e, February 20, 1985). This regulatory analysis therefore addresses only (1) the need for publishing guidance regarding how licensees should perform the required plant-specific analyses, (2) the appropriateness of this particular guidance, and (3) the basis i for the NRC staff acceptance criteria provided in the subject guide. , Need for Guidance The NRC staff has gained considerable experience concerning PTS risk analyses. This experience has come from performance of analyses by the staff, from prototype plant-specific analyses performed by national laboratories and sponsored by NRC, and from