Document: NUREG-0800
Document ID: 7bdf9a80-e0a1-48fe-a048-0d2501e0ff68
Document Type: srp
Title: EMERGENCY DIESEL ENGINE COMBUSTION AIR INTAKE AND EXHAUST
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070573.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.8
CFR Part: 
CFR Title: 

Content:
eviewed to assure that the arrangement and location of the combustion air intake and exhaust are such that dilution or contamination of the intake air by exhaust products, fire extinguishing (gaseous) medium, or other gases that may intentionally or accidentally be released on site will not preclude operation of the diesel engines at rated power output, or cause engine shutdown as a consequence of any meteorological or accident condition. 4. The SAR is reviewed to verify that if the intake air flow or engine exhaust is dependent upon the actuation of flow control devices (louvers, dampers), the EDECAIES will function if there is a failure of an active component. 5. The SAR is reviewed to assure that system components exposed to atmospheric conditions (dust storms, rain, ice, snow) are protected from possible clogging during standby or operation of the system. 6. The reviewer verifies that the system will function as required in the event of other adverse natural phenomena. The reviewer evaluates the system, using engineering judgment and failure modes and effects analyses to determine that: DRAFT Rev. 3 - April 1996 9.5.8-8 a. The failure of nonessential portions of the system or of other systems not designed to seismic Category I requirements and located close to essential portions of the system, or of non-seismic Category I structures that house, support, or are close to essential portions of the EDECAIES, will not preclude operation of the system. Reference to SAR sections describing site features and the general arrangement and layout drawings will be necessary, as well as the SAR tabulation of seismic design classifications for structures and systems. Statements in the SAR that verify that the above conditions are met are acceptable. b. The essential portions of the system are protected from the effects of floods, hurricanes, tornadoes, and internally or externally generated missiles. Flood protection and missile protection criteria are discussed and evaluated