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:
ng and instrumentation diagrams, and descriptive information for the system and auxiliary supporting systems essential to its operation. The essential portions of the EDEFSS that are necessary for the safe shutdown of the reactor or necessary to mitigate the consequences of an accident are designed to seismic Category I and Quality Group C. The basis for acceptance of the EDEFSS in our review was conformance of the design criteria and bases to the Commission's regulations as set forth in the General Design Criteria (GDC) of Appendix A to 10 CFR Part 50. The staff concludes that the plant 9.5.4-11 DRAFT Rev. 3 - April 1996 design 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 EDEFSS and the system itself to withstand the effects of natural phenomena such as earthquakes, tornadoes, hurricanes, and floods, and GDC 4, "Environmental and MissileDynamic Effects Design Bases," with respect to structures housing 57 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 EDEFSS, except for the buried fuel oil storage tanks and related components and piping, is housed in a Seismic Category I structure which provides protection from the effects of tornadoes, tornado missiles, turbine missiles, and floods. The buried portions are also protected from tornado, tornado and turbine missiles, and floods. This meets the positions of Regulatory Guide 1.115, "Protection Against Low-Trajectory Turbine Missiles," Position C.1, and "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 capability of shared systems and