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:
--------------------- Section 4.3.12.4.3.3 Section text ------------------------ No objection ---------------------------------- Section 4.3.12.4.3.4 Section text ------------------------ No objection ---------------------------------- Section 4.3.12.4.3.5 Section text ------------------------ No objection ---------------------------------- RG 1.247, Appendix A, Page A-59 Table A-14. Staff Position on ASME/ANS RA-S-1.4-2021, Technical Requirements for External Flooding PRA Index No. Issue Position Resolution Section 4.3.13 Section text ------------------------ No objection ---------------------------------- Section 4.3.13.1 Section text ------------------------ No objection ---------------------------------- Table 4.3.13.1-1 HLR-XFHA-A through HLR-XFHA-G ------------------------ No objection ---------------------------------- Table 4.3.13.1-2 XFHA-A1 through XFHA-A7 ------------------------ No objection ---------------------------------- XFHA-A8 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 of as well as missing information from the plant's as-built design in the PRA. Clarification CONFIRM that the external flood hazard screening represents either the as-built, as-operated or as-designed, as- intended-to-operate configuration of the plant, including relevant deficiencies (if applicable), and by performing walkdowns or, for PRAs performed during the preoperational phase, investigations. XFHA-A9 ------------------------ No objection ---------------------------------- Table 4.3.13.1-3 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,