Document: NUREG-0800
Document ID: 6f03df27-1f8c-428c-8e39-9465d1235fa1
Document Type: srp
Title: EMERGENCY DIESEL ENGINE LUBRICATION SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0704/ML070460354.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.7
CFR Part: 
CFR Title: 

Content:
continuous loss of off-site power as specified in ANSI/ANS-59.52. Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. GDC 2 requires that SSCs important to safety be designed to withstand the effects of natural phenomena like earthquakes, tornadoes, hurricanes, floods, tsunami, and seiches without loss of capability to perform safety functions. The EDELS safety function is to provide essential lubrication to the emergency diesel engine under standby, startup, and operating conditions. Compliance with GDC 2 requirements provides assurance that natural phenomena events will not affect EDELS capability to provide essential lubrication to the diesel engine. 2. GDC 4 requires that SSCs important to safety be designed to withstand such dynamic effects of pipe ruptures as pipe whip and jet impingement and externally- or internally-generated missiles. The EDELS safety function is to provide essential lubrication to the emergency diesel engines under standby, startup, and operating conditions. Compliance with GDC 4 provides assurance that the dynamic effects of equipment failures, and events external to the plant, will not affect EDELS capability to provide lubrication to the emergency diesel engines. 3. GDC 5 prohibits the sharing of SSCs important to safety among nuclear power units unless such sharing can be demonstrated not to impair their ability to perform safety functions, including in an accident in one unit an orderly shutdown and cooldown of the remaining unit. The EDELS safety function is to provide essential lubrication to the emergency diesel engines under standby, startup, and operating conditions. Compliance with GDC 5 provides assurance that an EDELS failure in one unit will not propagate to other units of the site. 4. GDC 17 requires an onsite electric power system for the functioning of SSCs important to safety. GDC 17