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:
y-related components in the event of a loss of offsite power resulting from natural phenomena events. 2. GDC 4 in relevant part requires that structures, systems, and components important to safety be designed to withstand the dynamic effects of pipe ruptures such as pipe whip and jet impingement, and externally or internally generated missiles. Regulatory Guide 1.115, Position C.1, identifies those essential systems that should be protected against low- trajectory turbine missiles. The safety function of the EDEFSS is to store a quality fuel supply for the EDE, and transfer the fuel to the emergency diesel engine following an engine start signal. In order to ensure the availability of emergency ac power, the EDEFSS must be capable of supplying fuel to the engine under the expected operational and postulated accident conditions for the plant. These conditions include consideration DRAFT Rev. 3 - April 1996 9.5.4-6 of the dynamic effects of equipment failures such as pipe ruptures and turbine missiles, and events and conditions external to the plant. Compliance with GDC 4 and the applicable portion of Regulatory Guide 1.115 provides assurance that the dynamic effects of equipment failures, and events external to the plant, will not affect the capability of the EDEFSS to provide fuel to the emergency diesel engines. 3. GDC 5 prohibits the sharing of structures, systems, and components important to safety among nuclear power units unless it can be demonstrated that such sharing will not significantly impair their ability to perform their safety functions, including in the event of an accident in one unit, an orderly shutdown and cooldown of the remaining unit. The safety function of the EDEFSS is to store a quality fuel supply for the EDE, and transfer the fuel to the emergency diesel engine following an engine start signal. In order to ensure the availability of emergency ac power to safety-related components, the EDEFSS must be designed to perform this safety