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:
goals for the operation of nuclear power plants. The staff expects licensees to provide strong technical bases for any TS change. The technical bases should be rooted in deterministic engineering and system analyses. TS change requests based on PRA results alone should not be submitted for review. TS change requests should give proper attention to the integration of considerations, such as conformance to the STS, generic applicability of the requested change if it is different from the STS, operational constraints, manufacturer recommendations, and practical considerations for test and maintenance. Standard practices used in setting CTs and SFs should be followed (e.g., CTs normally are 8 hours, 12 hours, 24 hours, 72 hours, 7 days, 14 days, and so on, and SFs normally are once per 12 hours, 7 days, 1 month, 3 months, and so on). Using such standards greatly simplifies implementation, scheduling, monitoring, and auditing. Logical consistency among the requirements should be maintained, (e.g., CT requirements for multiple trains out of service should not be longer than that for one of the constituent trains). 2.1 Compliance with Current Regulations (Principle 1) In evaluating proposed changes to TS, the licensee must ensure that the current regulations, orders, and license conditions are met, consistent with Principle 1 in RG 1.174. The 10 CFR 50.36 regulations are specific to TS. The NRC’s final policy statement on TS improvements (Ref. 20) provides additional information on the agency’s TS policies. These documents define the main elements of TS and provide criteria for items to be included in the TS. The final policy statement and the Statements of Consideration for 10 CFR 50.36, as published in Volume 60 of the Federal Register, page 36953 (60 FR 36953, July 19, 1995) (Ref. 21), also discuss the use of probabilistic approaches to improve TS. Regulations on applications for and the issuance of license amendments appear in 10 CFR 50.90, 10 CFR 50.91, and 10