Document: NUREG-0800
Document ID: 6fd4d885-bb73-4ac0-9513-7365558c831e
Document Type: srp
Title: REACTOR AUXILIARY COOLING WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550053.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.2
CFR Part: 
CFR Title: 

Content:
tions 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. One of the main objectives in CWS review is to determine its safety function. Some cooling systems are designed as entirely safety-related, others have only portions safety-related, and others are classified as nonsafety-related because they perform no safety function. To determine the safety category of a reactor auxiliary CWS, the review evaluates its necessity for achieving safe reactor shutdown conditions or for preventing or mitigating accidents. The safety functions of these systems in all designs are essentially the same; however, the method varies from plant to plant depending upon the designer. Upon request from the primary reviewer, the coordinating reviewers provide input for the areas of review in subsection I of this SRP section. The primary reviewer uses such input as required to complete this review procedure. In view of the various designs, the procedures are for a typical reactor auxiliary CWS designed entirely as a safety-related system. Any variance of the review procedures to take account of a proposed unique design ensures that the system meets the criteria of subsection II of this SRP section. 9.2.2-9 Revision 4 - March 2007 1. The safety analysis report (SAR) information on the design bases and design criteria and the system description section are reviewed by the primary review organization for whether the equipment and the minimum system heat transfer and flow requirements for normal plant operations are identified. The system piping and instrumentation diagrams (P&IDs) show which system components: A. Remove heat from the reactor primary coolant system necessary to achieve a safe reactor shutdown. B. Provide essential cooling for containment components or systems like the sprays, ventilation coolers, or sump