Document: NUREG-0800
Document ID: 6cf2fb95-08c8-493a-b5b1-4d05d609e5c4
Document Type: srp
Title: STATION SERVICE WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070512.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.1
CFR Part: 
CFR Title: 

Content:
996 9.2.1-6 constructed so that the SSE would not cause such failure. Compliance with Regulatory Guide 1.29, Positions C.1 and C.2, assures that the SWS will remain functional during a SSE and provide essential cooling water necessary for the operation of safety-related components and decay heat removal.37 2. Compliance with GDC 4 requires that the SWS structures, systems and components, which provide essential cooling for safety-related equipment, shall be designed to accommodate the effects of, and to be compatible with, the environmental conditions associated with normal operation, maintenance, testing, and postulated accidents, and shall be appropriately protected against dynamic effects, including the effects of missiles, pipe whipping, and discharging fluids, that may result from equipment failures and from external events. Compliance with GDC 4 assures that the SWS will remain functional under postulated environmental conditions and provide essential cooling water necessary for the operation of safety-related components and decay heat removal.38 3. GDC 5 prohibits the sharing of structures, systems and components among nuclear power units unless it can be shown that such sharing will not significantly impair their ability to perform their safety functions, including, in the event of an accident in one unit, an orderly shutdown and cooldown of the remaining units. The service water system provides essential cooling water necessary for the operation of safety-related components and decay heat removal. The service water system needs to be designed such that the ability to perform these safety-related functions are not compromised for each unit regardless of equipment failures or other events that may occur in another unit. Meeting the requirements of GDC 5 provides assurance that unacceptable effects of equipment failures or other events occurring in one unit of a multi-unit site will not propagate to the unaffected unit(s).39 4. GDC 44 requires that a SWS be