Document: NUREG-0800
Document ID: 5cdeed4a-6cd5-4840-90c0-5159fbf2c9f0
Document Type: srp
Title: CHILLED WATER
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1409/ML14093A350.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.7
CFR Part: 
CFR Title: 

Content:
rements identified in Subsection II. One of the main objectives in VWS review is to determine its safety function. Some cooling systems are designed as entirely safety-related, other systems 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 VWS, 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 VWS 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. The specific areas of review for the safety-related VWS are as listed below. Additionally, the nonsafety-related areas of review, including RTNSS B and C functions, are shown below each area of review for the safety-related VWS in bold-italics. 1. Programmatic Requirements ─ In accordance with the guidance in NUREG-0800 “Introduction,” Part 2 as applied to this SRP Section, the staff will review the programs proposed by the applicant to satisfy the following programmatic requirements. If any of the proposed programs satisfies the acceptance criteria described in Subsection II, it can be used to augment or replace some of the review procedures. It should be noted that the wording of “to augment or replace” applies to nonsafety-related risk-significant SSCs, but “to replace” applies to nonsafety-related nonrisk-significant SSCs