Document: NRC Regulatory Guide
Document ID: 8a2332d3-66ca-40af-84e1-507db8b26559
Document Type: regulatory_guide
Title: TRIAL - Acceptability of Probabilistic Risk Assessment Results for Non-Light Water Reactor Risk-Informed Activities
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2123/ML21235A008.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.247
CFR Part: 
CFR Title: 

Content:
and has found that it is acceptable for use, either in whole or in part, and allowed for use by licensees as discussed within the RG. The staff endorsement on this RG does not intend to provide a new interpretation of requirements in the ASME/ANS NLWR PRA standard, as necessary interpretations are provided by the standards developing organization, nor to change the text of the standard. The staff position provides resolutions to identified issues on using an acceptable PRA to support a regulatory application. RG 1.247, Appendix A, Page A-3 Table A-1. Staff Position on ASME/ANS RA-S-1.4-2021, NLWR Standard Introduction, Acronyms and Definitions, and Risk Assessment Application Process Index No. Issue Position Resolution Document-wide General The phrase “advanced non-LWR” is used throughout the standard but is not defined. Clarification The standard may be applied to any non-light water reactor (NLWR), regardless of whether the NLWR incorporates one or more of the attributes listed in the Commission’s “Policy Statement on the Regulation of Advanced Reactors” (73 FR 60612; October 14, 2008). References Use of references: The various references may be acceptable in general; however, the staff has not reviewed the references, and there may be aspects that are not applicable or not acceptable. Clarification For every reference cited in the standard: No staff position is provided on this reference. The staff neither approves nor disapproves of information contained in the referenced document. Section 1: Introduction Section 1.1 through Section 1.12 ------------------------ No objection -------------------------------- Section 2: Acronyms and Definitions Section 2.1 Acronyms ------------------------ No objection -------------------------------- Section 2.2 Feasibility In the context of operator actions, several high-level requirements and supporting requirements refer to “feasibility”; however, this term is not defined in the NLWR PRA standard. Feasibility