Document: NUREG-0800
Document ID: 4cf3fa16-4c16-442f-9f37-a4f430fc022d
Document Type: srp
Title: EMERGENCY DIESEL ENGINE COMBUSTION AIR INTAKE AND EXHAUST SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350043.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.8
CFR Part: 
CFR Title: 

Content:
onents," with respect to the capability of shared systems and components important to safety to perform required.safety functions. Each unit of the plant has its own emergency diesel generators, whose EOECAIES is not shared between the diesel generators. 9.5.8-6 Rev. 2 - July 1981 3. The applicant has met the requirements of GDC 17, "Electric Power Systems," with respect to the capability of combustion air intake and exhaust system to meet independence and redun- dancy criteria. Each EDECAIES is independent and physically separated from the other system serving the redundant diesel generators. Single failure in any one of the two systems will affect only the associated diesel generator. Each system is sized and physically arranged such that no degradation of engine function will be experienced when the diesel generator set is required to operate continuously at maximum rated power output. The air intakes are located feet above plant grade and adequate filters are provided to minimize airbone particulate material (dust) from entering the system. Suitable design precautions have been taken to preclude degradation of the diesel engine power output due to recirculation of exhaust gases and ingestion of other dilutents that would reduce the oxygen content below acceptable levels. This meets the position of Regulatory Guide 1.9, "Selection, Design, and Qualification of Diesel Generator Units Used as Standby (Onsite) Electric Power Systems at Nuclear Power Plants." The applicant has also met the positions of Branch Technical Position ICSB-17 (P5B), "Diesel Generator Protective Trip Circuit Bypasses.," and NUREG/CR-0660, "Enhancement of Onsite Emergency Diesel Generator Reliability." The applicant has met the requirements of the following industry standards: IEEE Standard 387, "IEEE Standard Criteria for Diesel Generator Units Applied as Standby Power Supplies for Nuclear Power Generating Stations," and Diesel Engine Manufacturers Associated (DEMA) Standard. V.