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:
nerating 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 performance of active components, and the capability of the system to function as intended under accident conditions. To assure structural integrity and leaktightness, operability and performance of active components, and the capability of the system to function as intended, the diesel engine cooling water system has provisions to permit periodic inspection and functional testing during standby and normal modes of power plant operation. 9.5.5-13 DRAFT Rev. 3 - April 1996 The staff concludes that the design of the diesel engine cooling water system conforms to all applicable GDCs, positions of the regulatory guides cited, NUREG/CR-0660, staff positions, and industry standards, and is therefore acceptable. If the applicant proposes to designate an emergency diesel generator as the alternate AC source in response to a station blackout event, the following finding should be included: The applicant has met the requirements of 10 CFR Part 50.63, "Loss of All Alternating Current Power," relevant to the design of the EDECWS for the Alternate ac power source. The EDECWS for the Alternate ac power source can perform its cooling functions for its associated diesel generator independent of preferred and onsite emergency ac power for the specified duration of the station blackout. This meets the applicable positions of Regulatory Guide 1.155 "Station Blackout."58 For design certification reviews, the findings will also summarize, to the extent that the review is not discussed in other safety evaluation report sections, the staff's