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:
S provides essential cooling water necessary for the operation of safety-related components and decay heat removal and be designed for each unit’s ability to perform safety-related functions without compromise regardless of equipment failures or other events in another unit. GDC 5 requirements provide assurance that unacceptable effects of equipment failures or other events in one unit of a multi-unit site will not propagate to the unaffected unit(s). 4. GDC 44 requires an SWS to transfer heat from SSCs important to safety to an ultimate heat sink and specifies performance and design requirements that the SWS must meet. GDC 44 requirements assure that the SWS will function to provide essential cooling to safety-related equipment and decay heat removal during normal, transient, and accident conditions. 5. GDC 45 requires that the SWS, which provides essential cooling for safety-related equipment, be designed for appropriate periodic inspection of important components like heat exchangers and piping to assure system integrity and capability. By periodic monitoring to detect signs of system degradation or incipient failure, GDC 45 provides 9.2.1-7 Revision 5 - March 2007 assurance that the SWS will function reliably to provide decay heat removal and essential cooling for safety-related equipment. 6. GDC 46 requires that the SWS, which provides essential cooling for safety-related equipment, be designed for appropriate periodic pressure and functional testing of the structural and leak-tight integrity of its components, the operability and the performance of system active components, and the operability of the system as a whole and, under conditions as close to design as practical, the performance of the full operational sequence that brings the system into operation for reactor shutdown and for loss-of-coolant accidents, including operation of portions of the protection system and transfer between normal and emergency power sources. By designing the SWS for testing