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:
ena and loss of offsite power. The reviewer evaluates the system for whether: A. Failure of nonessential EDECWS portions or of other systems not designed to seismic Category I requirements and located close to essential EDECWS portions or failure of nonseismic Category I structures housing, supporting, or located close to essential EDECWS portions will not preclude essential functions. Reference to SAR sections describing site features and the general arrangement and layout drawings as well as the SAR tabulation of seismic design classifications for structures and systems is necessary. SAR statements to the effect that these conditions are met are acceptable. B. Essential EDECWS portions are protected from the effects of floods, hurricanes, tornadoes, and internally- and externally-generated missiles. Flood protection and missile protection criteria are evaluated in detail under the SRP sections for Chapter 3 of the SAR. A statement to the effect that the system is located in a tornado-, missile-, and flood-protected seismic Category I structure or that system components are located in individual cubicles or rooms that will withstand the effects of both flooding and missiles is acceptable. 4. The reviewer verifies whether there are high- or moderate-energy piping systems located close to the EDECWS or whether the EDECWS is protected from the effects of postulated breaks in these systems. The means of such protection are in SAR Chapter 3 and procedures for review of such information are in the SRP sections for that chapter. 5. The descriptive information, P&IDs, onsite emergency power supply drawings, and system analyses are reviewed for whether essential portions of the system will function following design basis accidents, assuming a concurrent, single, active component failure. The reviewer evaluates the results of failure modes and effects analyses in the SAR for the functioning of required system portions. 6. The performance requirements of the diesel engine are