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:
FLSN-A20 through FLSN-A21 ------------------------ No objection ---------------------------------- Table 4.3.8.3-3 FLSN-B1 A walkdown should be performed for post-operational plants and should not be replaced with an investigation. However, a physical walkdown of a plant in the pre-operational phase of development may not always be possible. Performing an investigation instead of a walkdown when a walkdown is possible may result in a mischaracterization the plant response in the PRA. Clarification … (f) calculations or other analyses used to support or refine the flooding evaluation; (g) walkdowns or, for PRAs performed during the preoperational phase, investigation(s) performed; … FLSN-B2 through FLSN-B3 ------------------------ No objection ---------------------------------- Section 4.3.8.4 RG 1.247, Appendix A, Page A-26 Table A-9. Staff Position on ASME/ANS RA-S-1.4-2021, Technical Requirements for Internal Flood Analysis Index No. Issue Position Resolution Section text ------------------------ No objection ---------------------------------- Table 4.3.8.4-1 HR-FLEV-A through HR-FLEV-C ------------------------ No objection ---------------------------------- Table 4.3.8.4.2 FLEV-A1 through FLEV-A4 ------------------------ No objection ---------------------------------- Table 4.3.8.4.3 FLEV-B1 through FLEV-B7 ------------------------ No objection ---------------------------------- Table 4.3.8.4.4 FLEV-C1 through FLEV-C3 ------------------------ No objection ---------------------------------- Section 4.3.8.5 Section text ------------------------ No objection ---------------------------------- Table 4.3.8.5-1 HLR-FLPR-A through HLR-FLPR-C ------------------------ No objection ---------------------------------- Table 4.3.8.5-2 FLPR-A1 through FLPR-A3 ------------------------ No objection ---------------------------------- Table 4.3.8.5-3 FLPR-B1 through FLPR-B10 ------------------------ No objection ---------------------------------- Table 4.3.8.5-4 FLPR-C1