Document: NRC Regulatory Guide
Document ID: 22ccfd5e-c5d8-4615-a02c-32369aa9f533
Document Type: regulatory_guide
Title: Acceptability of Probabilistic Risk Assessment Results for Risk-Informed Activities (Rev. 3)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1930/ML19308B636.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.200
CFR Part: 
CFR Title: 

Content:
Requirements for At-Power Internal Flood Index No Issue Position Resolution Section 3-1 3-1.1 thru 3-1.3 -------------------- No objection -------------------- Section 3-2 3-2 -------------------- No objection -------------------- 3-2.1 – IFPP 3-2.1.1 -------------------- No objection -------------------- Table 3-2.1-1 -------------------- No objection -------------------- Tables 3-2.1-2(a) thru 3-2.1-3(b) IFPP-A1 thru IFPP-A5 -------------------- No objection -------------------- IFPP-B1 thru IFPP-B3 -------------------- No objection -------------------- 3-2.2 – IFSO 3-2.2.1 -------------------- No objection -------------------- Table 3-2.2-1 -------------------- No objection -------------------- Tables 3-2.2-2(a) thru 3-2.2-3(b) IFSO-A2 thru IFSO-A4, IFSO-A6 -------------------- No objection -------------------- IFSO-A1 The list of fluid systems should be expanded to include fire protection systems. Clarification For each flood area ... INCLUDE: (a) equipment (e.g., piping, valves, pumps) located in the area that are connected to fluid systems (e.g., circulating water system, service water system, …and reactor coolant system, and fire protection system) … DG-1362, Appendix A, Page A-20 Table A-3. Staff Position on ASME/ANS RA-Sa-2008 Part 3, Technical and Peer Review Requirements for At-Power Internal Flood Index No Issue Position Resolution IFSO-A5 It is necessary to consider a range of flow rates for identified flooding sources, each having a unique frequency of occurrence. For example, small leaks that only cause spray are more likely than large leaks that may cause equipment submergence. Clarification (b) range of flow rates IFSO-B1 thru IFSO-B3 -------------------- No objection -------------------- 3-2.3 – IFSN 3-2.3.1 -------------------- No objection -------------------- Table 3-2.3-1 -------------------- No objection -------------------- Tables 3-2.3-2(a) thru 3-2.3-3(b) IFSN-A1 thru IFSN-A5, IFSN-A-7 thru IFSN-A17 -------------------- No