Document: NUREG-0800
Document ID: f673d9c7-5410-4f11-8c45-1935b546a77f
Document Type: srp
Title: EMERGENCY DIESEL ENGINE COOLING WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070570.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.5
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Power Systems Branch (PSB)Plant Systems Branch (SPLB)1 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 to assure conformance with General Design Criteria 2, 4, 5, 17, 44, 45, and 46. The PSBSPLB review includes those portions of the 2 EDECWS that receive heat from components essential for proper operation of the diesel engines and that are housed within their respective diesel engine compartments, and those additional parts of the system that transfer the heat to a heat sink. The system includes all valves, heat exchangers, pumps, and piping up to the engine interface.(1) 1. The PSBSPLB reviews the functional performance characteristics of the EDECWS and 3 the effects on those characteristics of adverse environmental occurrences, abnormal operational requirements, accident conditions, and loss of offsite power. DRAFT Rev. 3 - April 1996 9.5.5-2 2. The system is reviewed to determine that malfunction or single failure of a component, or the loss of a cooling source, will not reduce the safety-related functional performance capabilities of the system. The PSBSPLB verifies that: 4 a. System components and piping have sufficient physical separation or shielding to protect the system from internally or externally generated missiles and from pipe whip and jet impingement caused by cracks or breaks in high- and moderate-energy piping. b. System components are designed in accordance with the design codes required by the assigned quality group and seismic category classifications. c. The system is housed in structures designed to seismic Category I requirements. d. Failures of nonseismic Category I structures and components would not affect the safety-related functions of the EDECWS. 3. The PSBSPLB reviews the design of the EDECWS with respect to the following: 5 a. Functional capability during periods of abnormally