Document: NUREG-0800
Document ID: 28a7b60c-ac66-4869-9189-83f494a5059d
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350042.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9
CFR Part: 
CFR Title: 

Content:
own of the reactor or necessary to mitigate the consequences of an acci- dent are designed to seismic Category I and Quality Group C. The staff concludes that the design of the emergency diesel engine lubrication system is acceptable and meets the requirements of GDC 2, 4, 5, and 17. This conclusion is based on the following: 1. The applicant has met the requirements of GDC 2, "Design Bases for Protection Against Natural Phenomena," .with respect to the ability of structures housing the EDELS and the system itself to withstand the effects. of natural phenomena such as earthquakes, tornadoes, hurricanes, and floods, and GDC 4, "Environmental and Missile Design Bases" with respect to structures housing the system and the system itself being capable of withstanding the effects of externally and internally generated missiles, pipe whip, and jet impingement forces associated with pipe breaks. The EDELS is housed in a seismic Category I structure which pro- vides protection from the effects of tornado, tornado missiles, turbine missiles, and floods. This meets the positions of Regu- latory Guides 1.115, "Protection Against Low-Trajectory Turbine Missiles," Position C.1, and 1.117, "Tornado Design Classification," Appendix Position 13. 2. The applicant has met the requirements of GDC 5, "Sharing of Structures, Systems and Components," with respect to the capability of shared systems and components important to safety to perform required safety functions. Each unit of the plant has its own emergency diesel generators, whose EDELS is not shared between the diesel generators. 3. The applicant has met the requirements of.GDC 17, "Electric Power Systems," with respect to the capability of .the lubri- cation system to meet independence and redundancy criteria. Each EDELS is independent and physically separated from the other system serving the redundant diesel generator. A single failure in any one of the systems will affect only the associ- ated diesel generator. The EDELS for