Document: NUREG-0800
Document ID: b5ea3f55-f54e-45cf-b921-3944d12b4ce2
Document Type: srp
Title: REACTOR AUXILIARY COOLING WATER SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350545.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.2
CFR Part: 
CFR Title: 

Content:
tion with regard to safety. Some cooling systems are designed as safety-related systems in their entirety, others have only portions of the system that are safety-related, and others are classified as nonsafety-related because they do not perform any safety function. To determine the safety category of a CWS, the ASB will evaluate its necessity for achieving safe reactor shutdown condi- tions or for accident prevention or accident mitigation functions. The safety functions to be performed by these systems in all designs are essentially the same, however, the method used varies from plant to plant depending upon the individual designer. Upon request from the primary reviewer, the coordinating review branches will provide input for the areas of review stated in subsection I of this SRP section. The primary reviewer obtains and uses such input as required to ensure that this review procedure is complete. In view of the various designs provided, the procedures set forth below are for a typical CWS designed entirely as a safety-related system. Any variance of the review procedures to take account of a proposed unique design will be such as to ensure that the system meets the criteria of subsection II. The reviewer 9.2.2-5 Rev. 2 - April 1984 will select and emphasize material from this SRP section, as may be appropriate for a particular case. 1. The information provided in the SAR pertaining to the design bases and design criteria, and the system description section are reviewed to verify that the equipment used and the minimum system heat transfer and flow requirements for normal plant operations are identified. A review of the system piping and instrumentation diagrams (P&IDs) will show which components of the system are used to: 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 such as the sprays, ventilation coolers, or sump equipment. c. Provide