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:
hstand earthquakes without the loss of capabilities to perform safety function is listed in RG 1.29. Compliance with GDC 2 is reviewed under other SRP sections as specified in subsection I of this SRP section. 2. GDC 4 requirements of SSCs to be protected against the effects of externally- and internally-generated missiles, pipe whip, and jet impingement forces of pipe breaks, apply to safety-related EDECAIES SSCs. Compliance with GDC 4 is reviewed under other SRP sections as specified in subsection I of this SRP section. 3. GDC 5 requirements for sharing of SSC important to safety are met when each diesel generator has its own independent and reliable combustion air intake and exhaust system. 4. GDC 17 as related to the capabilities of the diesel engine combustion and air intake exhaust system to meet independence and redundancy criteria. Acceptance is based on meeting the following specific criteria: A. NUREG/CR-0660, "Enhancement of Onsite Emergency Diesel Generator Reliability." i. Engine combustion air should be through piping directly from outside the building with the air intake sufficiently (20 feet) above ground level and filtered to preclude any degradation of continuous engine function. ii. The piping for room ventilation air should be separate from that for engine combustion air. iii. Engine exhaust gas should not circulate back into the diesel generator room, fuel storage room, or any part of the power plant. B. Each emergency diesel engine should have an independent and reliable combustion air intake and exhaust system sized and physically arranged for no degradation of engine function when the diesel generator set must operate continuously at the maximum rated power output. 9.5.8-6 Revision 3 - March 2007 C. The combustion air intake system must have a means of reducing airborne particulate material over the entire time period requiring emergency power, assuming the maximum airborne particulate concentration at the combustion air intake. D. Suitable