Document: NUREG-0800
Document ID: d6f7c640-9c89-4c04-a929-3caac89cdb95
Document Type: srp
Title: EMERGENCY DIESEL ENGINE COOLING WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350039.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.5.5
CFR Part: 
CFR Title: 

Content:
as set forth in the General Design Criteria (GDC) of Appendix A to 10 CFR Part 50. The staff concludes that the plant design is accept- able and meets the requirements of GDC 2, 4, 5, 17, 44, 45, and 46. 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 EDECWS 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 EDECWS is housed in a seismic Category I structure which provides protection from the effects of tornado, tornado missiles, turbine missiles, and floods. This meets the positions of Regulatory 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 capabil- ity 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 EDECWS is not shared between the diesel generators. 3. The applicant as met the requirements of GDC 17, "Electric Power Systems," with respect to the capability of the cooling system to meet independence and redundancy criteria, and GDC 44 with respect to the following: a. The capability to transfer heat from systems and components to a heat sink under transient or accident conditions, b. Redundancy of components so that under accident conditions the safety function can be performed assuming a single active component failure, and c. The