Document: NUREG-0800
Document ID: d9e9d0a9-6390-4154-94dc-7d5e6d8145cd
Document Type: srp
Title: A-C POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350489.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.1
CFR Part: 
CFR Title: 

Content:
ty and fire retardancy, and their fire underwriters rating in accordance with SRP Section 9.5.1. All cable and cable tray penetrations through walls and floors as well as any other types of cable ways or conduits should have fire stops installed. PSB will 8.3.1-17 Rev. 2 - July 1981 review cable derating and raceway fill to ensure compliance with accepted industry practices; -IV. EVALUATION FINDINGS The reviewer verifies that sufficient information has been provided and that *the review supports conclusions of the- following type, to be included in the staff's safety evaluation report: The onsite power system includes the standby power sources, distribution systems, vital auxiliary supporting systems, and instrumentation and controls required to supply power to safety- related components and systems. The review of the a-c power system for the plant covered the descriptive information (CP and OL), functional logic diagrams (CP and OL), functional piping and instrument diagrams (CP and OL) electrical single-line diagrams (CP and OL), preliminary (CP) and final (OL) physical arrangement drawings, and electrical schematics (OL). The basis for acceptance of the a-c power system 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 design is acceptable and meets the requirements of GDC 2, 4, 5, 17, 18 and 50. This conclusion is based on the following: 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 a-c power systems being capable of withstanding the effects of natural phenomena such as earthquakes, tornadoes, hurricanes, and floods by locating the a-c power system and components in seismic Category' I structures which provides protection from the effects of tornadoes, tornado missiles, and floods.