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:
Staff Position on ASME/ANS RA-S-1.4-2021, Technical Requirements for Hazard Screening Analysis Index No. Issue Position Resolution Section 4.3.11.2.1 Section text ------------------------ No objection ---------------------------------- Section 4.3.11.2.2 Section text ------------------------ No objection ---------------------------------- Section 4.3.11.2.2.1 Section text ------------------------ No objection ---------------------------------- Section 4.3.11.2.2.2 Section text ------------------------ No objection ---------------------------------- Section 4.3.11.2.2.3 Section text ------------------------ No objection ---------------------------------- Section 4.3.11.2.2.4 Section text ------------------------ No objection ---------------------------------- RG 1.247, Appendix A, Page A-53 Table A-13. Staff Position on ASME/ANS RA-S-1.4-2021, Technical Requirements for High Winds PRA Index No. Issue Position Resolution Section 4.3.12 Section text ------------------------ No objection ---------------------------------- Section 4.3.12.1 Section text ------------------------ No objection ---------------------------------- Table 4.3.12.1-1 HLR-WHA-A through HLR-WHA-G ------------------------ No objection ---------------------------------- Table 4.3.12.1-2 WHA-A1 through WHA-A4 ------------------------ No objection ---------------------------------- WHA-A5 The 150-mi distance in this requirement is too prescriptive, arbitrary, and based on the writers' judgement/experience. This doesn’t conform to the revised ASME PRA, where the requirement was revised to be less arbitrary and more evidence based. Clarification … a. meet SCR-3 in Table 1.10-1 by showing that the site is more than 150 miles (approximately 250 km) is sufficiently far away from the nearest tropical cyclone-prone coast to screen out tropical cyclone (hurricane or typhoon) high wind hazards from the probabilistic wind hazard analysis; WHA-A6 through WHA-A8 ------------------------ No objection