Document: NRC Regulatory Guide
Document ID: c7a40fcc-fc9d-4eb2-ad86-f9f5b0f04c82
Document Type: regulatory_guide
Title: Plant-Specific, Risk-Informed Decisionmaking:  Technical Specifications (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1920/ML19206A489.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.177
CFR Part: 
CFR Title: 

Content:
roach that is acceptable to the staff of the U.S. Nuclear Regulatory Commission (NRC) for developing risk-informed applications for changes to completion times (CTs) and surveillance frequencies (SFs) of plant technical specifications (TS). This guide provides specific guidance for considering engineering issues and using risk information to evaluate changes to nuclear power plant TS CTs and SFs. This RG supplements the guidance provided in RG 1.174, “An Approach for Using Probabilistic Risk Assessment in Risk-Informed Decisions on Plant-Specific Changes to the Licensing Basis,” (Ref. 1) and includes precise terminology to ensure that the defense-in-depth philosophy is interpreted and implemented consistently. Applicability This RG applies to light-water reactor (LWR) licensees subject to Title 10 of the Code of Federal Regulations (10 CFR) Part 50, “Domestic Licensing of Production and Utilization Facilities” (Ref. 2), and 10 CFR Part 52, “Licenses, Certifications, and Approvals for Nuclear Power Plants” (Ref. 3). Applicable Regulations • 10 CFR Part 50, “Domestic Licensing of Production and Utilization Facilities,” provides regulations for licensing production and utilization facilities. o 10 CFR 50.36, “Technical specifications,” requires applicants to submit proposed TS for their facilities. The TS include items in the categories of (1) safety limits, limiting safety system settings, and limiting control settings, (2) limiting conditions for operation, (3) surveillance requirements, (4) design features, and (5) administrative controls (stating that each licensee DG-1287, Page 2 shall submit any reports to the Commission pursuant to approved TS as specified in 10 CFR 50.4, “Written communications.” o 10 CFR 50.90, “Application for amendment of a license, construction permit, or early site permit,” requires that applications for license amendments must fully describe the changes desired. • 10 CFR Part 52, “Licenses,