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:
has been taken, where such piping is identified, to ensure that the piping will not be subjected to unacceptable thermal stresses (Reference 20). This review should focus on RHR system configurations; reviewing the stress analysis and ensuring the analysis is in accordance with the ASME code is the responsibility of EMEB in SRP Section 3.9.3.119 For standard design certification reviews under 10 CFR Part 52, the procedures above should be followed, as modified by the procedures in SRP Section 14.3 (proposed), to verify that the design set forth in the standard safety analysis report, including inspections, tests, analysis, and acceptance criteria (ITAAC), site interface requirements and combined license action items, meet the acceptance criteria given in subsection II. SRP Section 14.3 (proposed) contains procedures for the review of certified design material (CDM) for the standard design, including the site parameters, interface criteria, and ITAAC.120 IV. EVALUATION FINDINGS The reviewer verifies that the SAR contains sufficient information and histhe review supports 121 the following kinds of statements and conclusions, which should be included in the staff's Safety Evaluation Report (SER) : 122 For PWRs The residual heat removal function is accomplished in two phases: the initial cooldown phase and the residual heat removal (RHR system) operation phase. In the event of loss of offsite power, the initial phase of cooldown is accomplished by use of the auxiliary feedwater system and the atmospheric dump valves. This equipment is used to reduce the reactor coolant system temperature and pressure to values that permit operation of the RHR system. The review of the initial cooldown phase is discussed in Section of the SER. The review of the RHR system operational phase is discussed below. The residual heat removal (RHR) system removes core decay heat and provides long-term core cooling following the initial phase of reactor cooldown. The scope of review of the RHR