Document: NUREG-0800
Document ID: 2200e046-1749-4aa1-a474-997b369b63b2
Document Type: srp
Title: REACTOR AUXILIARY COOLING WATER SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070513.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.2
CFR Part: 
CFR Title: 

Content:
GDC 2 requires that nuclear power plant structures, systems, and components important to safety be designed to withstand the effects of natural phenomena such as earthquake, tornado, hurricane, flood, tsunami, and seiche without loss of capability to perform their intended safety functions. The function of the reactor auxiliary CWS is to provide adequate cooling water to reactor system components, reactor shutdown equipment, ventilation equipment, and components of the ECCS during normal operations, anticipated operational occurrences, and accident conditions. GDC 2 applies to this SRP section to ensure that the CWS can withstand the effects of all appropriate combinations of seismic and dynamic effects resulting from these natural phenomena without loss of capability to perform its design safety functions. Meeting the requirements of GDC 2 provides assurance that the reactor auxiliary CWS and associated equipment will be capable of operating during the most severe historical natural phenomena, in combination with appropriate normal operations and accident conditions, without loss of capability to perform their intended safety functions. 46 2. Compliance with GDC 4 requires that structures, systems, and components important to safety be designed to accommodate the effects of, and be compatible with, environmental conditions associated with normal operations, maintenance, testing, and postulated accidents, including loss-of-coolant accidents (LOCAs) and dynamic effects resulting from pipe whip, missiles, and discharging fluids. GDC 4 applies to this SRP section because the reviewer evaluates the CWS and its associated equipment to verify their capability to continue functioning in a manner that will ensure safe shutdown during normal operations, anticipated operational occurrences, and accident conditions. In addition, the CWS must be able to mitigate the consequences, or prevent the occurrence, of an accident caused by exposure to environmental conditions associated