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:
, pipe whip, and jet impingement forces of pipe breaks apply to safety-related EDELS SSCs. Comprehensive compliance with GDC 4 is reviewed under other SRP sections as specified in subsection I of this SRP section. 3. GDC 5 requirements for sharing of SSCs important to safety among nuclear power units are met if each unit has its own diesel generator(s), each with an independent lubrication system. 4. GDC 17 requirements of independence and redundancy criteria are applicable to the EDELS. Acceptance is based on the following specific criteria: A. NUREG/CR-0660, "Enhancement of Onsite Emergency Diesel Generator Reliability." B. System operating pressure, temperature differentials, flow rate, and heat removal rate external to the engine in accordance with engine manufacturer recommendations. C. Sufficient system protective measures to maintain required oil quality during engine operation. D. Protective measures (e.g., relief ports) to prevent unacceptable crankcase explosions and to mitigate consequences of such events. E. A keep-warm oil lubricating system to maintain engine lubricating oil passages in a warmed and filled state when the diesel engine is in the standby mode. F. System design to circulate lubricating oil to the diesel engine during standby to enhance starting capability in conditions under which the engine-driven oil pump can pressurize the system quickly following engine starts. 9.5.7-6 Revision 3 - March 2007 G. Each diesel engine lubricating oil system completely independent of other diesel engines so a single failure will not cause a loss of the required minimum diesel generator capacity as specified in ANSI/ANS-59.52. H. Onsite lubricating oil storage capacity for each diesel engine sufficient for seven days operation after any design basis event and a 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