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:
es 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 provided to transfer heat from structures, systems, and components important to safety to an ultimate heat sink, and specifies performance and design requirements that the SWS must meet. Based on the lessons learned from TMI-2, a requirement was issued for the design of BWR auxiliary heat removal systems to ensure that necessary automatic and manual actions could be taken to ensure the proper functioning of the SWS when the main feedwater system is inoperable. Acceptance criteria related to this issue are identified in TMI action plan item II.K.1.22 of NUREG- 0737 and 10 CFR 50, section 50.34(f)(2)(xxi). Compliance with GDC 44 and the identified TMI-related requirements assures that the SWS will function to provide essential cooling to safety-related equipment and decay heat removal during normal, transient, and accident conditions.40 5. Compliance with GDC 45 requires that the SWS, which provides essential cooling for safety-related equipment, be designed to permit appropriate periodic inspection of important components, such as heat exchangers and piping, to assure the integrity and capability of the system. By allowing for periodic monitoring to detect signs of system degradation or incipient failure, compliance with GDC 45 provides assurance that the SWS will reliably function to provide essential cooling to safety-related equipment and decay heat removal.41 6. Compliance with GDC 46 requires that the SWS, which provides essential cooling for safety-related equipment, be designed to permit appropriate periodic pressure and functional testing to assure the structural and leak-tight integrity of its components, the operability and the performance of the active components of the system, and the operability of the system as a whole and, under conditions as close to