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:
SI-191 Technical Assessment,” NUREG/CR-6762, Vols. 1–4, August 2002, ADAMS Accession Nos. ML022470077 (package), ML022470093, ML022480182, and ML022480262. A-3. U.S. Nuclear Regulatory Commission, “Containment Emergency Sump Performance: Technical Findings Related to Unresolved Safety Issue A-43,” NUREG-0897, Rev. 1, October 1985, ADAMS Accession No. ML112440046. A-4. U.S. Nuclear Regulatory Commission, “Hydraulic Performance of Pump Suction Inlets for Emergency Core Cooling Systems in Boiling Water Reactors,” NUREG/CR-2772, June 1982, ADAMS Accession No. ML112440074. A-5. U.S. Nuclear Regulatory Commission, “Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems,” Generic Letter 2008-01, January 11, 2008, ADAMS Accession No. ML072910759. A-6 Nuclear Energy Institute, “Guidelines for Effective Prevention and Management of System Gas Accumulation,” NEI 09-10, Rev. 1a-A, April 2013, ADAMS Accession No. ML13136A129. A-7 U.S. Nuclear Regulatory Commission, “Guidance to NRC/NRR/DSS/SRXB Reviewers for Writing Temporary Instruction (TI) 2515/177 Suggestions for the Region Inspections,” Rev. 11, May 23, 2011, ADAMS Accession No. ML111660748 (package). DG-1385, Appendix B, Page B-1 APPENDIX B GUIDANCE FOR THE USE OF CONTAINMENT ACCIDENT PRESSURE IN DETERMINING THE NET POSITIVE SUCTION HEAD MARGIN FOR EMERGENCY CORE COOLING SYSTEM PUMPS AND CONTAINMENT HEAT REMOVAL PUMPS IN BOILING-WATER REACTORS AND PRESSURIZED-WATER REACTORS The purpose of this guidance is to ensure that emergency core cooling system (ECCS) and containment heat removal pumps will perform their safety functions during postulated design-basis accidents (DBAs) and certain postulated non-DBAs. Specifically, this guidance addresses the use of containment accident pressure (CAP) to ensure adequate suction conditions for these pumps. This appendix refers to the pertinent non-DBAs collectively as “special events.” B-1 Pump Net Positive