Document: NRC Regulatory Guide
Document ID: 47b09be1-4bf8-45f9-a099-7fed871c09bd
Document Type: regulatory_guide
Title: Plant-Specific, Risk-Informed Decisionmaking: Inservice Testing (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2114/ML21140A055.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.175
CFR Part: 
CFR Title: 

Content:
f the same principles with respect to changes to a plant’s licensing basis. The NRC encourages licensees to consult these and other international documents noted throughout this regulatory guide and implement the good practices, where applicable, that are consistent with NRC regulations. RG 1.175, Page 9 C. STAFF REGULATORY GUIDANCE This section provides detailed descriptions of the methods, approaches, or data that the staff considers acceptable for meeting the requirements of the applicable regulations cited in the Introduction of this guide. This RG provides a brief overview of a four-element approach, described in RG 1.174, as applied to the development of an RI-IST program for submittal as part of an alternative request in accordance with 10 CFR 50.55a(z)(1). This approach is iterative rather than sequential. Element 1 of the approach is to define the proposed changes to the IST program, which will help determine what supporting information is needed and define how subsequent reviews will be performed. Element 2 of the approach is to perform an engineering analysis to justify the proposed changes to the IST program. Element 3 of the approach is to define the implementation and monitoring program to ensure that the conclusions drawn from the risk-informed evaluation remain valid. Element 4 of the approach is to address the documentation requirements for licensee submittals to the NRC and to identify additional information that the licensee should maintain in its records in case later review or reference is needed. Appendix A to this RG contains additional guidance for dealing with certain IST-related issues that might arise during the deliberations of the licensee in carrying out integrated decisionmaking. Licensees submitting risk information to the NRC should address each of the principles of risk-informed decisionmaking discussed in RG 1.174 and repeated in this guide and identify the appropriateness of chosen approaches and methods (whether they are