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:
s guidance on an acceptable approach for developing risk-informed applications for a licensing basis change and considers engineering issues and applies risk insights. This RG supplements the guidance provided in RG 1.174. The staff normally uses deterministic engineering analysis to evaluate license amendment requests for TS changes that are consistent with approved staff positions (e.g., generic letters, regulatory guides, standard review plans, branch technical positions, or the Standard Technical Specifications (STS) (Refs. 10-14)). For TS change requests that go beyond current staff positions, in which a licensee elects to use risk information in support of the proposed TS change, the staff’s evaluation may use deterministic engineering analyses and the risk-informed approach set forth in this RG. The staff will review the information provided by the licensee to determine whether it can approve the application based on the information provided using deterministic and risk-informed methods, as applicable, and will either approve or reject the application based upon the review. DG-1287, Page 5 The guidance provided within this guide does not preclude other approaches for requesting changes to the TS. Rather, this RG is intended to improve consistency in regulatory decisions when the results of risk analyses are used to help justify TS changes. This regulatory guide describes an acceptable approach for assessing the nature and impact of proposed TS changes in CTs and SFs by considering engineering issues and applying risk insights. As presented in detail under Regulatory Position C of this RG, assessments should consider relevant safety margins and defense-in-depth attributes, including considering success criteria as well as equipment functionality, reliability, and availability. In addition, this RG describes acceptable TS change implementation strategies and performance monitoring plans that will help ensure that assumptions and analyses supporting the change