Document: NUREG-0800
Document ID: 6d6e43af-f998-40fc-9062-1277b9cebd60
Document Type: srp
Title: REACTOR AUXILIARY COOLING WATER SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350544.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.2
CFR Part: 
CFR Title: 

Content:
ristics are then reviewed for the following points: a. Essential portions of the CWS are correctly identified and are isol- able from the nonessential portions of the system. The P&IDs are reviewed to verify that they clearly indicate the physical division between each portion and indicate required classification changes. System drawings are reviewed to see that they show the means for accomplishing isolation and the SAR description is reviewed to identify minimum performance of the isolation valves. The drawings and description are reviewed to verify that automatically operated isolation valves separate nonessential portions and components from the essential portions. Special consideration is given to the case of redundant interconnected trains to assure operation of at least 9.2.2-6 Rev. 3 - June 1986 - - one safety-related train by proper isolation in the event of an acci- dent or transient. b. Essential portions of the CWS, including the isolation valves separat- ing seismic Category I portions from the nonseismic portions, are Quality Group C and seismic Category 1. System design bases and cri- teria, and the component classification tables are reviewed to verify that the heat exchangers, pumps, valves, and piping of essential por- tions of the system will be designed to seismic Category I requirements in accordance with the applicable criteria. The review of seismic design is performed by the structural and geotechnical reviewer of EB and the review for seismic and quality group classification is performed by the mechanical engineering reviewer of EB as indicated in subsection I of this SRP section. c. The system is designed to provide water makeup as necessary. Cooling water systems that are closed loop systems are reviewed to ensure that the surge tanks have sufficient capacity to accommodate expected leakage from the system for seven days or that a seismic source of makeup can be made available within a time frame consistent with the surge tank capacity