Document: NRC Regulatory Guide
Document ID: cde52d5a-adf9-49be-9d1f-59449dfca895
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:
plant response analysis including consideration of operations; flooding design/licensing basis; design, construction, and performance of flood protection features; hydrology and hydraulics; and manual actions. RG 1.247, Appendix A, Page A-65 Table A-14. Staff Position on ASME/ANS RA-S-1.4-2021, Technical Requirements for External Flooding PRA Index No. Issue Position Resolution the plant's as-built design in the PRA. XFPR-G2 ------------------------ No objection ---------------------------------- XFPR-G3 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 EVALUATE the external floods plant response analysis for the as-built, as-operated or as-designed, as-intended-to- operate plant conditions via walkdown(s) or, for PRAs performed during pre- operational phase, investigation(s) to do the following: Table 4.3.13.3-9 XFPR-H1 through XFPR-H3 ------------------------ No objection ---------------------------------- Section 4.3.13.4 Section 4.3.13.4.1 Section text ------------------------ No objection ---------------------------------- Section 4.3.13.4.2 Section text ------------------------ No objection ---------------------------------- Section 4.3.13.4.3 Section 4.3.13.4.3.1 Section text ------------------------ No objection ---------------------------------- Section 4.3.13.4.3.2 Section 4.3.13.4.3.2.1 Section text ------------------------ No objection ---------------------------------- RG 1.247, Appendix A, Page A-66 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 4.3.13.4.3.2.2 Section text ------------------------ No objection