Document: NUREG-0800
Document ID: bb233b69-c637-41e8-9774-95be0cc8b117
Document Type: srp
Title: STATION SERVICE WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550056.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.1
CFR Part: 
CFR Title: 

Content:
tions are identified correctly and can be isolated from nonessential portions. The P&IDs are reviewed for whether they clearly indicate both the physical division between each portion and the required classification changes. System drawings are also reviewed for whether they show how isolation is accomplished and the SAR description is reviewed for minimum performance requirements for the isolation valves. The drawings and descriptions are reviewed for whether automatically-operated isolation valves separate nonessential and essential portions and components. Redundant interconnected trains are considered specially for assurance of the operation of at least one safety-related train by proper isolation in an accident or transient. B. Essential SWS portions, including the isolation valves separating essential and nonessential portions, are classified Quality Group C and seismic Category 1. SAR component and system descriptions of mechanical and performance characteristics are reviewed for whether the seismic and safety classifications are included and whether the P&IDs indicate any points of change in piping quality group classification. C. Design provisions permit appropriate inservice inspection and functional testing of system components important to safety. The design is acceptable if the SAR information delineates a testing and inspection program and if the system drawings show the necessary test recirculation loops around pumps or isolation valves required by this program. 3. The reviewer determines whether the safety function of the system will be maintained, as required, in adverse environmental phenomena like earthquakes, tornadoes, hurricanes, and floods or in certain pipe breaks or loss of offsite power. The reviewer uses engineering judgment, the results of a failure mode and effects analyses, and the results of reviews under other SRP sections to verify whether: A. The failure of portions of the system or of other systems not designed to seismic Category