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:
normal operating and accident conditions. b. Component redundancy so that safety functions can be performed assuming a single active component failure coincident with the loss of offsite power. c. The capability to isolate components, systems, or piping, if required, so that the system safety function will not be compromised. d. Loss of cooling water to reactor coolant pump (RCP) seals,Task Action Plan items II.K.2.16 and II.K.3.25 of NUREGs-0718 and 0737 as they related to as per 10 CFR 50.34(f)(1)(iii).35 e. Remote manual isolation of the RCP seal coolant water by the main control room operator to permit continued long-term pump operation in an actual event.36 9.2.2-7 DRAFT Rev. 4 - April 1996 e.f. A single failure in the CWS does not result in fuel damage or reactor coolant leakage in excess of normal coolant-makeup capability. Single failure includes but is not limited to operator error, spurious activation of a valve operator, and loss of a cooling water pump. g. A moderate-energy leakage crack or an accident that is initiated from a failure in the CWS piping does not result in excessive fuel damage or reactor coolant leakage in excess of normal coolant- makeup capability. A single active failure is considered when evaluating the consequences of this accident. Moderate leakage cracks are determined in accordance with the guidelines of Branch Technical Position ASB 3-1, "Protection Against Postulated Failures in Fluid Systems 37 Outside Containment." h. It has been demonstrated by testing that the reactor coolant pumps will withstand a complete loss of cooling water for 20 minutes, and instrumentation in accordance with IEEE 279 IEEE Std 603 as endorsed by Regulatory Guide 1.153, that alarms in the control room is provided to detect a loss of cooling 38 water to ensure a period of 20 minutes is available so that the operator would have sufficient time to initiate manual protection of the plant. Alternatively, if it is not demonstrated by the necessary pump