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:
personnel to confirm that the selection of plant operating states correctly represents the as-designed, and as-intended- to-operate plant. POS-A9 through POS-A13 ------------------------ No objection -------------------------------- Table 4.3.1.1-3 POS-B1 The requirement should assess whether grouping of POSs impacts risk- significant event sequences. Without such an assessment, Qualification CC-I GROUP plant evolutions into a set of representative evolutions. ENSURE that (a) the evolutions within a group can be considered RG 1.247, Appendix A, Page A-7 Table A-2. Staff Position on ASME/ANS RA-S-1.4-2021, Technical Requirements for Plant Operating State Analysis Index No. Issue Position Resolution event sequences that might otherwise be considered risk- significant may not be categorized as such. similar in terms of the set of plant operating states that they contain; (b) the evolutions are bounded by the worst case impact within the group; (c) the grouping does not impact risk-significant event sequences. POS-B2 through POS-B8 ----------------------- No objection ---------------------------------- Table 4.3.1.1-4 POS-C1 through POS-C5 ----------------------- No objection ---------------------------------- Table 4.3.1.1-5 POS-D1 through POS-D3 ----------------------- No objection ---------------------------------- Section 4.3.1.2 Section text ----------------------- No objection ---------------------------------- Section 4.3.1.2.1 Section text ----------------------- No objection ---------------------------------- Section 4.3.1.2.2 Section text ----------------------- No objection ---------------------------------- Section 4.3.1.2.3 Section text ----------------------- No objection ---------------------------------- RG 1.247, Appendix A, Page A-8 Table A-3. Staff Position on ASME/ANS RA-S-1.4-2021, Technical Requirements for Initiating Event Analysis Index No. Issue Position Resolution Section 4.3.2 Section text ------------------------ No objection