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:
XFHA-B1 through XFHA-B4 ------------------------ No objection ---------------------------------- Table 4.3.13.1-4 RG 1.247, Appendix A, Page A-60 Table A-14. Staff Position on ASME/ANS RA-S-1.4-2021, Technical Requirements for External Flooding PRA Index No. Issue Position Resolution XFHA-C1 through XFHA-C11 ------------------------ No objection ---------------------------------- Table 4.3.13.1-5 XFHA-D1 through XFHA-D4 ------------------------ No objection ---------------------------------- Table 4.3.13.1-6 XFHA-E1 through XFHA-E4 ------------------------ No objection ---------------------------------- Table 4.3.13.1-7 XFHA-F1 A walkdown should be performed for post- operational plants as part of an investigation. However, a physical walkdown of a plant in the pre-operational phase of development may not always be possible. Performing an investigation that involves something less than a walkdown for post-operational plant may result in a mischaracterization the plant's as-built design in the PRA. Clarification COLLECT information via walkdown(s) or, for PRAs performed during the preoperational phase, investigation(s) (complemented, as needed, by hydrologic surveys) about either the as-built, as-operated or as-designed, as-intended-to- operate, as applicable, plant and site characteristics relevant to the hazard analysis such as site topography, features that may affect flow around the site, drainage features, and features that may impound water. XFHA-F2 through XFHA-F4 ------------------------ No objection ---------------------------------- Table 4.3.13.1-8 XFHA-G1 through XFHA-G4 ------------------------ No objection ---------------------------------- Table 4.3.13.2 Section text ------------------------ No objection ---------------------------------- Table 4.3.13.2-1 RG 1.247, Appendix A, Page A-61 Table A-14. Staff Position on ASME/ANS RA-S-1.4-2021, Technical Requirements for External Flooding PRA Index No. Issue Position Resolution HLR-XFFR-A through