Document: NUREG-0800
Document ID: 243e1ce7-857c-48e4-9eb7-6125311da9be
Document Type: srp
Title: RESIDUAL HEAT REMOVAL (RHR) SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070437.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.7
CFR Part: 
CFR Title: 

Content:
e rupture strength capable of withstanding full RCS pressure is not possible, the reviewer verifies that appropriate compensating measures have been taken in accordance with the review provided in SRP Section 3.12 (proposed).13 2. With respect to the staff review for compliance with Branch Technical Position RSB 5-1 (Reference. 57) , the Auxiliary Systems Branch (ASB) Plant Systems Branch (SPLB), 14 Materials and Chemical Engineering Branch (CMEB EMCB) , and RSBSRXB effort is 15 16 divided as follows: a1. For BWRs, the RSB SRXB reviews the processes and systems used in the 17 cooldown of the reactor for the entire spectrum of potential reactor coolant system pressures and temperatures during decay heat removal. b2. For PWRs, the RSB SRXB reviews the approach used to meet the functional 18 requirements of BTP RSB 5-1 with respect to cooldown to the conditions permitting operation of the RHR system. Since an alternate approach to that normally used for cooldown may be specified, the reviewers identify all components and systems used. The CMEB EMCB has primary review 19 responsibility for the review of the pertinent portions of the CVCS (SRP Section 9.3.4). The ASB SPLB , as part of its primary review responsibility for SRP 20 Sections 10.3 and 10.4.9 reviews the atmospheric dump valves and the source for auxiliary feedwater, respectively, for conformance to BTP RSB 5-1. The RSB SRXB reviews the pressurizer relief valve and ECCS, if used. PWR 21 depressurization systems used for cooldown are reviewed by the SRXB as part of its primary review responsibility for SRP Section 6.8 (proposed). In addition, 22 the RSB SRXB reviews the tests and supporting analysis concerning mixing of 23 borated water and cooldown under natural circulation as required in BTP RSB 5-1. c3. For both PWRs and BWRs, the ASB SPLB reviews the component cooling or 24 service water systems that transfer decay heat from the RHR system to the ultimate heat sink as part of its primary review