Document: NUREG-0800
Document ID: ed02b850-92b8-49b0-bb93-6c21528c5133
Document Type: srp
Title: EMERGENCY DIESEL ENGINE STARTING SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550034.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.6
CFR Part: 
CFR Title: 

Content:
delineate all modes of operation and include the means for monitoring, indicating, and controlling receiver air pressure as required by the engine starting service. The P&IDs are reviewed to determine whether a pressure gauge, relief valve, drain valve, automatic means of maintaining the receiver pressure within an allowable range, and suitable low pressure alarms are provided for the receiver(s). Piping interconnections between the dedicated air start systems are reviewed for whether a failure in the interconnecting piping could lead to the loss of starting for more than one diesel engine. The building layout drawings are examined for sufficient space around the components for inspection. The reviewer verifies whether the air starting system meets the specific criteria of Subsection II, SRP Acceptance Criteria. 3. The SAR is reviewed for whether each diesel engine air start system has its own compressor and whether the compressor capacity is adequate for the air receiver capacities of the dedicated air starting system. 4. The reviewer verifies whether the system is designed for operation and maintenance in adverse environmental like hurricanes, tornadoes, or floods, and is protected against the effects of internally-or externally-generated missiles. 5. The reviewer determines whether the failure of nonseismic Category I systems, structures, or components close to the EDESS will preclude system operation. 6. The reviewer determines whether the EDESS design precludes fouling of the air start valve or filter with moisture and contaminants like oil and rust carryover. Air dryers should be installed upstream of air receivers to remove entrained moisture. 7. The reviewer determines whether essential EDESS portions are protected from the effects of high-and moderate-energy line breaks. Layout drawings are reviewed for whether high-or moderate-energy piping systems are close to the system or for protection from the effects of failure. Provisions for such protection are