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:
transfer heat from SSCs important to safety to an ultimate heat sink is provided. In addition, the SWS can transfer the combined heat load of these SSCs under normal operating and accident conditions, assuming loss of offsite power and a single failure, and that system portions can be isolated so the safety function of the system is not compromised. 5. Cooling Water System Inspection. Information that addresses the requirements of GDC 45 regarding the inspection of cooling water systems will be considered acceptable if the design of the SWS permits inservice inspection of safety-related components and equipment and operational functional testing of the system and its components. 6. Cooling Water System Testing. Information that addresses the requirements of GDC 46 regarding the testing of cooling water systems will be considered acceptable if the SWS is designed for testing to detect degradation in performance or in the system pressure 9.2.1-6 Revision 5 - March 2007 boundary so that the SWS will function reliably to provide decay heat removal and essential cooling for safety-related equipment. Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. GDC 2 requires that the SWS SSCs providing essential cooling for safety-related equipment be designed to withstand the effects of natural phenomena without loss of capability to perform safety functions. Based on numerous SAR reviews, a seismic design classification system developed for identifying plant features should be designed to withstand SSE effects. RG 1.29 describes an acceptable method for classifying light-water reactor nuclear power plant features that should be designed to withstand SSE effects. SSCs that should be designed to remain functional in SSEs are designated as Seismic Category 1. RG 1.29, Position C.1, states that systems required for safe shutdown, including their