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:
mplished by the residual heat removal (RHR) system. However, certain single failures can render the RHR system inoperative. In that event, two alternate systems that use components of the RCIC and RHR system are available to bring the reactor to cold shutdown conditions. The scope of review of these systems for the plant included piping and instrumentation diagrams, equipment layout drawings, failure modes and effects analysis, and design performance specifications for essential components. The review has included the applicant's proposed design criteria and design bases for these systems and histhe analysis of the adequacy of those criteria and bases and of the conformance of 136 the design to these criteria and bases. The staff concludes that the design of the Rresidual Hheat Rremoval Ssystem is 137 acceptable and meets the requirements of General Design Criteria 2, 4, 5, 19, and 34 and 10 CFR 50.34(f)(2)(xxvi) . This conclusion is based on the following: 138 (1) The applicant has met General Design Criterion 2 with respect to position C-2 of Regulatory Guide 1.29 concerning the seismic design of systems, structures and components (SSCs) whose failure could cause an unacceptable reduction in the 139 capability of the residual heat removal system. (2) The applicant has met the General Design Criterion 4 with respect to dynamic effects associated flow instabilities and loads (e.g., water hammer). (3) The applicant has met the requirements of General Design Criterion 5 with respect to sharing of structures, systems, and components SSCs by 140 demonstrating that such sharing does not significantly impair the ability of the Rresidual Hheat Rremoval Ssystem to perform its safety function including, in 141 the event of an accident to one unit, an orderly shutdown and cooldown of the remaining units. (4) The applicant has met General Design Criterion 19 with respect to the main control room requirements for normal operations and shutdown and General Design Criterion 34