Document: NUREG-0800
Document ID: 6fd4d885-bb73-4ac0-9513-7365558c831e
Document Type: srp
Title: REACTOR AUXILIARY COOLING WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550053.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.2
CFR Part: 
CFR Title: 

Content:
of this SRP section. 4. The system design information and drawings are analyzed by the primary review organization for whether the following features are incorporated: A. A leakage detection system to detect component or system leakage is provided. An adequate means for implementing this criterion is by sumps or drains with adequate capacity and appropriate alarms in the immediate area of the system. B. Components and headers of the system are designed for individual isolation capabilities to ensure system function, control system leakage, and allow system maintenance. C. Design provisions ensure the capability to detect radioactivity leakage or chemical contamination from one system to another. Radioactivity monitors and conductivity monitors should be located in the system component discharge lines to detect leakage. An alternative means of preventing leakage is by operating the system at higher pressure so leakage is in the preferred direction. D. The system is designed for cooling the RCP seals and bearings during normal plant operating conditions, anticipated operational occurrences, and following 9.2.2-11 Revision 4 - March 2007 postulated accidents. There should be instrumentation in accordance with IEEE Std 603, as endorsed by RG 1.153, with alarms in the control room to detect a loss of cooling water to ensure that the operator has a period of 20 minutes to initiate manual protection of the plant, if necessary. E. For new pressurized-water reactor applications, the design provides for RCP seal integrity during station blackout. Acceptable provisions include a diverse injection/cooling system that may be powered from the alternate alternating current (AAC) source for station blackout independent of non-AAC source-backed injection/cooling systems and support systems to the extent practicable. Where a system for RCP seal injection/cooling is required specifically to meet the station blackout duration, the system should comply with RG 1.155, Position C.3.3.4,