Document: NUREG-0800
Document ID: 12f45e44-74bc-4a6b-933a-2fd6bc43c6dd
Document Type: srp
Title: deals with the fuel oil storage and transfer system for these diesel engines up to the engine
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070569.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.4
CFR Part: 
CFR Title: 

Content:
locating the day tank other than stated above shall assure that the diesel-generator unit can start automatically and attain the required voltage and frequency within acceptable limits and time. If a booster pump is required, it shall be powered from a reliable power supply and arranged to operate when the engine receives a start signal and it shall operate during the engine starting cycle or until system fuel oil pressure is established by the engine-driven fuel oil pump. d. A day or integral tank overflow line is provided to return excess fuel oil delivered by the transfer pump back to the fuel oil storage tank. e. A low-level alarm is provided to enable the operator to accomplish minor repairs or maintenance before all fuel in the day or integral tank is consumed (assuming full-power operation). f. The day or integral tank and storage tanks associated with each diesel-generator set include provisions for removal of accumulated water. 7. The reviewer verifies that suitable precautions will be taken, once the fuel oil tank has been filled, to exclude sources of ignition such as open flames or hot surfaces, and that protective measures such as compartmentation of redundant elements are used to minimize the potential causes and consequences of fires and explosions. 8. The reviewer verifies that the system function will be maintained as required in the event of failure of nonseismic Category I systems or structures located near the system. Reference to the SAR sections describing site features and the general arrangement and layout drawings will be necessary in this determination. Plant arrangement features, in conjunction with the protection obtained by location and the design of the system and structures, are considered in determining the ability of the system to maintain function in the event of such failures. 9. The diesel engine fuel oil storage and transfer system is reviewed to verify that protection from the effects of breaks in high and moderate energy lines