Document: NUREG-0800
Document ID: c5cd8519-169f-4fec-9d25-9ddb3ba73f52
Document Type: srp
Title: RESIDUAL HEAT REMOVAL (RHR) SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550002.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.7
CFR Part: 
CFR Title: 

Content:
as may be appropriate for a particular case. 5.4.7-9 Revision 4 - March 2007 These review procedures are based on the identified SRP acceptance criteria. For deviations from these acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. For operating license (OL) reviews, the reviewer uses the procedures to verify that the final design appropriately implements the initial design criteria and bases as set forth in the final safety analysis report (SAR). The OL review also covers the proposed technical specifications to ensure that they are adequate with regard to limiting conditions of operation and periodic surveillance testing. As noted in Subsections I and II, the organization responsible for the review of reactor thermal hydraulic systems for PWRs considers only the low pressure—low temperature RHR system. For BWRs, the review includes all of the systems used to transfer residual heat from the reactor over the entire range of potential reactor coolant temperatures and pressures. The reviewer should apply the following steps for the appropriate systems, depending on whether the plant is a PWR or BWR. The reviewer should adapt these steps to construction permit or OL reviews as appropriate. 1. Using the description given in the applicant’s SAR, including component lists and performance specifications, the reviewer determines that the system piping and instrumentation provide reasonable assurance that the system(s) will operate as intended, with or without offsite power and given any single active component failure. To do this, the reviewer evaluates the piping and instrumentation diagrams (P&IDs) to confirm that piping arrangements permit the achievement of the required flowpaths and that sufficient process sensors are available to measure and transmit required information. The reviewer uses a failure modes