Document: NUREG-0800
Document ID: 02f672d7-50e8-458f-90d4-e5eb19bd5a4d
Document Type: srp
Title: EMERGENCY DIESEL ENGINE COOLING WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550035.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.5
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Organization responsible for the review of diesel generator support systems Secondary - None I. AREAS OF REVIEW The emergency diesel engine cooling water system (EDECWS) provides cooling water to the station emergency diesel engines and is reviewed for compliance General Design Criteria (GDCs) 2, 4, 5, 17, 44, 45, and 46. The review covers EDECWS portions housed within their respective diesel engine compartments receiving heat from components essential for proper operation of the diesel engines and additional parts of the system transferring the heat to a heat sink. The system includes all valves, heat exchangers, pumps, and piping up to the engine interface.1 The specific areas of review are as follow: 1. The EDECWS is reviewed to verify whether: A. Each emergency diesel engine has an independent cooling water system. B. The system is properly designed, fabricated, erected, and tested to acceptable quality standards. 9.5.5-2 Revision 3 - March 2007 C. The system has boundary divisions between safety-related and nonsafety-related sections. D. Failure of any nonseismic Category I structure, system, or component (SSC) will not affect EDECWS safety-related functions. E. Sections of the system important to safety are housed within seismic Category I structures. F. The consequences of a single active failure in an EDECWS or the loss of a cooling source will not lead to a loss of more than one diesel generator. G. Instrumentation and control features permit operational testing of the system and assure that normal protective interlocks do not preclude engine operation during emergency conditions. H. The design includes the capability to detect and control system leakage, including isolation of portions of the system for excessive leakage or component malfunction. I. Sufficient space permits inspection, cleaning, maintenance, and repair of the system. J. The design includes measures to preclude long-term corrosion and organic fouling that