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:
CEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. These review procedures are based on the identified SRP acceptance criteria. For deviations from these acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. 9.5.5-8 Revision 3 - March 2007 EDECWS design may vary considerably from plant to plant due to the requirements of various diesel engine manufacturers, the number and type of secondary cooling loops for heat removal, and the number of intermediate cooling loops required to transfer the rejected heat to the ultimate heat sink. Variations in design also may occur due to performances of various architect-engineer firms. Therefore, for purposes of this SRP section, a typical system is assumed. Any variance in the review procedure to suit a particular design must cover the system review areas in subsection I of this SRP section and the system must meet the criteria in subsection II of this SRP section. 1. The SAR is reviewed to establish that the EDECWS description and related diagrams clearly delineate system operation, individual and total heat removal rates required by components, and the margin in the design heat removal rate capability. The reviewer verifies the following: A. The interfacing branches review the seismic design bases and the seismic and quality group classifications as indicated in subsection I of this SRP section. The primary reviewer assures that essential EDECWS portions including the isolation valves separating essential and non-essential portions are classified quality Group C and seismic Category I. SAR component and system descriptions of mechanical and performance characteristics are reviewed for whether the seismic and quality group classifications are included and whether the piping and instrumentation