Document: NUREG-0800
Document ID: d6f7c640-9c89-4c04-a929-3caac89cdb95
Document Type: srp
Title: EMERGENCY DIESEL ENGINE COOLING WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350039.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.5
CFR Part: 
CFR Title: 

Content:
t sink under transient or accident conditions, b. Redundancy of components so that under accident conditions the safety function can be performed assuming a single active component failure, and c. The capability to isolate components of the system or pip- ing, if required to maintain the system safety function. Each EDECWS is independent and physically separated from the other system serving the redundant diesel generator. A single failure in any one of the two systems will affect only the associated diesel generator. The EDECWS tranfers the heat generated by the diesel to the ultimate heat sink via the heat exchangers and the service water system. This meets the position of Regulatory Guide 1.9, "Selection, Design, and Qualification of Diesel Generator Units Used as Standby (Onsite) Electric Power Systems at Nuclear Power Plants." The applicant has also met the positions of Branch Technical Position ICSB-17 (PSB), "Diesel Generator Protective Trip Circuit Bypasses," and NUREG/CR-0660, 9.5.5-7 Rev. 2 - July 1981 "Enhancement of Onsite Emergency Diesel Generator Reliability." The applicant has met the requirements of the following industry standards: IEEE Standard 387, "IEEE Standard Criteria for Diesel Generator Units Applied as Standby Power Supplies for Nuclear Power Generating Stations," and Diesel Engine Manufacturers Association (DEMA) Standard. 4. The applicant has met the requirements of GDC 45 with respect to design provisions to permit periodic inspections of safety- related components and equipment of the system and GDC 46 with respect to design provisions to permit appropriate functional testing of safety-related systems or components to assure structural integrity and leaktightness, operability and per- formance of active components, and the capability of the system to function as intended under accident conditions. To assure structural integrity and leaktightness, operability and per- formance of active components, and the capability of the system to