Document: NUREG-0800
Document ID: eb1d19c1-686c-42f5-ba0a-c417c7b12b8e
Document Type: srp
Title: DC POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070499.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.2
CFR Part: 
CFR Title: 

Content:
onvert the dc to ac and are arranged to provide a dependable power supply for 107 safety-related instrumentation and control loads. The review of the dc power system for the ________ plant covered the single-line diagrams (CP and OL), station layout drawings (CP and OL), schematic diagrams (OL) , and descriptive information. The basis for acceptance of the 108 dc power system in ourthe review was conformance of the design criteria and bases to the 109 Commission's regulations as set forth in 10 CFR 50.63 and the General Design Criteria 110 (GDC) of Appendix A to 10 CFR Part 50. The staff concludes that the plant design is 111 DRAFT Rev. 3 - April 1996 8.3.2-18 acceptable and meets the requirements of GDC General Design Criteria 2, 4, 5, 17, 18, and 50 and of 10 CFR 50.63. This conclusion is based on the following: 112 1. The applicant has met the requirements of GDC 2, "Design Basis for Protection Against Natural Phenomena," with respect to structures, systems, and components of the dc power systems being capable of withstanding the effects of natural phenomena such as earthquakes, tornadoes, hurricanes, and floods as the dc power system and components are located in seismic Category I structures, which provides protection from the effects 113 of tornadoes, tornado missiles, and floods. In addition, the dc power system and components have a quality assurance designation "Class 1E." 2. The applicant has met the requirements of GDC 4, "Environmental and Missile Dynamic Effects Design Bases," with respect to structures, systems, and components of the dc 114 power system being capable of withstanding the effects of missiles and environmental conditions associated with normal operation and postulated accidents by adequate plant design and equipment qualification program. 3. The applicant has met the requirements of GDC 5, "Sharing of Structures, Systems, and Components," with respect to structures, systems, and components of the dc power system. The dc power system and