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:
ety to perform required safety functions. Each unit DRAFT Rev. 3 - April 1996 9.5.5-12 of the plant has its own emergency diesel generators whose EDECWS is not shared between the diesel generators. 3. The applicant as met the requirements of GDC 17, "Electric Power Systems," with respect to the capability of the cooling system to meet independence and redundancy criteria, and GDC 44 with respect to the following: a. The capability to transfer heat from systems and components to a heat 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 piping, 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 systemsEDECWS will affect only the associated diesel generator. The 55 EDECWS transfers the heat generated by the diesel to the ultimate heat sink via the heat exchangers and the service water system. This meets the positions of Regulatory Guide 1.9, "Selection, Design, andQualification, and Testing of Diesel Generator Units Used As Standby (Onsite)Class 1E Onsite Electric Power Systems At Nuclear Power Plants." The applicant has also met the positions of 56 Branch Technical Position ICSB-17 (PSB), "Diesel Generator Protective Trip Circuit Bypasses," and NUREG/CR-0660, "Enhancement Of Onsite Emergency 57 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