Document: NUREG-0800
Document ID: 91b47227-679e-4e3e-95a7-e32002caa9a9
Document Type: srp
Title: EMERGENCY DIESEL ENGINE COMBUSTION AIR INTAKE AND EXHAUST
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550033.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.8
CFR Part: 
CFR Title: 

Content:
ated in a seismic Category I structure that is tornado- missile and flood-protected, or that components of the system will be located in individual cubicles or rooms that will withstand the effects of both flooding and missiles is acceptable. C. Essential portions of the system are protected from the effects of high-energy and moderate-energy line breaks. Layout drawings are reviewed to assure that no high- or moderate-energy piping systems are close to the essential portions of the system, or that protection from the effects of failure will be provided. The means of providing such protection will be given in Section 3.6 of the SAR and procedures for reviewing this information are in the corresponding SRP sections. 7. The descriptive information, P&IDs, EDECAIES layout drawings, and failure modes and effects analyses in the SAR are reviewed to assure that functional requirements of the system will be met following design basis accidents, assuming a concurrent single, active component failure. The reviewer evaluates the effects of failure of components, traces the availability of redundant components on system drawings, and checks that the SAR contains verification that the system functional requirements are met. 8. The SAR is reviewed for provisions in the diesel generator combustion air intake design to minimize the ingestion of airborne particulate material over the entire time requiring emergency power. The reviewer also verifies the following: A. The bottom of the intake opening is located a minimum of 6.1 meters (20 feet) above grade. B. Provisions are made to minimize the generation of dust, particularly in multi-unit plants when one unit is operating and the other is under construction (abnormal generation of dust). 9.5.8-9 Revision 3 - March 2007 Dust control in the ventilation system for the diesel generator rooms is reviewed by interfacing branches under SRP Section 9.4.5. In SRP Section 8.3.1, interfacing branches review the SAR for whether electrical