Document: NUREG-0800
Document ID: 7aef037f-a817-4377-a41f-be2c1006a20b
Document Type: srp
Title: STATION SERVICE WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350543.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.1
CFR Part: 
CFR Title: 

Content:
component allowable operational degradation (e.g., pump leakage) and describes the procedures that will be followed to detect and correct these conditions when they became excessive. 2. The reviewer, using the results of failure modes and effects analyses as appropriate, comparisons with previously approved systems, or independent calculations, determines that the system is capable of sustaining the loss of any active component and meeting minimum system requirements (cooling load and flow) for the degraded conditions. The system P&IDs, layout drawings, and component descriptions and characteristics are then reviewed for the following points: a. Essential portions of the SWS are correctly identified and are isol- able from the non-essential portions of the system. The P&IDs are reviewed to verify that they clearly indicate the physical division between each portion and indicate the required classification changes. System drawings are also reviewed to see that they show the means for accomplishing isolation and the SAR description is reviewed to iden- tify minimum performance requirements for the isolation valves. The drawings and descriptions are reviewed to verify that automatically operated isolation valves separate non-essential portions and compo- nents from the essential portions. Special consideration is given to the case of redundant interconnected trains to assure the operation of at least one safety-related train by proper isolation in the event of an accident or transient. b. Essential portions of the SWS, including the isolation valves separat- ing essential and non-essential portions, are classified Quality Group C and seismic Category 1. Components and system descriptions in the SAR that identify mechanical and performance characteristics are reviewed to verify that the above seismic and safety classifica- tions have been included, and that the P&IDs indicate any points of change in piping quality group classification. c. Design provisions have been