Document: NRC Regulatory Guide
Document ID: 6f0a99f2-d25a-44e3-b7f2-3286449a9752
Document Type: regulatory_guide
Title: Water Sources for Long-Term Recirculation Cooling Following a Loss-of-Coolant Accident (Rev. 5)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2126/ML21266A185.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.82
CFR Part: 
CFR Title: 

Content:
of an approval under 10 CFR Part 52, “Licenses, Certifications, and Approvals for Nuclear Power Plants.” The staff also does not intend to use the guidance to support NRC staff actions in a manner that constitutes forward fitting as that term is defined and described in Management Directive 8.4. If a licensee believes that the NRC is using this regulatory guide in a manner inconsistent with the discussion in this Implementation section, then the licensee may file a backfitting or forward fitting appeal with the NRC in accordance with the process in Management Directive 8.4. DG-1385, Page 41 ACRONYM LIST 10 CFR Title 10 of the Code of Federal Regulations ADAMS Agencywide Documents Access and Management System ANSI American National Standards Institute BWR boiling-water reactor BWROG Boiling Water Reactor Owners’ Group CAP containment accident pressure CFD computational fluid dynamics CS core spray or containment spray CSS containment spray system DBA design-basis accident ECCS emergency core cooling system GDC general design criterion (criteria) GL Generic Letter GSI Generic Safety Issue HELB high energy line break HI Hydraulic Institute HPSI high pressure safety injection HX heat exchanger IAEA International Atomic Energy Agency IN Information Notice LPSI low pressure safety injection LOCA loss-of-coolant accident LWR light water reactor NEI Nuclear Energy Institute NPSH net positive suction head NPSHa net positive suction head available NPSH margin net positive suction head margin (NPSHa – NPSHr) NPSHr net positive suction head required DG-1385, Page 42 NRC U.S. Nuclear Regulatory Commission PDR public document room PWR pressurized-water reactor RCS reactor coolant system RG Regulatory Guide RHR residual heat removal RPV reactor pressure vessel RWST refueling water storage tank SE safety evaluation URG Utility Resolution Guide WCAP Westinghouse Commercial Atomic Power ZOI zone of influence DG-1385, Page 43 REFERENCES1 1. U.S. Code of Federal Regulations,