Document: NUREG-0800
Document ID: b351c30f-74b4-4d36-833e-939d23abae4e
Document Type: srp
Title: D-C POWER-SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350494.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.2
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Power Systems Branch (PSB) Secondary - None I. AREAS OF REVIEW The descriptive information, analyses, and referenced documents, including electrical single line diagrams, electrical schematics, functional piping and instrument diagrams, logic diagrams, tables, and physical arrangement drawings for the d-c onsite power system, presented in the applicant's safety analysis report (SAR), are reviewed. The intent of the review is to determine that the d-c onsite power system satisfies the requirements of General Design Criteria 2, 4, 5, 17, 18 and 50 and will perform its intended functions during all plant operating and accident conditions. The d-c power systems include those d-c power sources and their distribution systems and vital supporting systems provided to supply motive or control power to safety-related equipment. Batteries and battery chargers are used as the power sources for the d-c power system, and inverters are used to convert d-c from the d-c distribution system to a-c instrumentation and control power as required. The PSB will pursue the following phases in the review of the d-c Dower systems during both the construction permit (CP) and operating license (OL3 stages of the licensing process: 1. System Redundancy Requirements The system is reviewed to determine that the required redundancy of components and subsystems is provided. This requires an examination of the d-c power system configuration including power supplies, power supply feeders, load center arrangements, loads supplied from each bus, and power connections to the instrumentation and control devices of the system. Rev. 2 - July 1981 USNRC STANDARD REVIEW PLAN Standard review plans are prepared for the guldance of the Office of Nuclear Reactor Regulation taff responsible for the review of applications to construct and oera nuclear power plants. Thes documents are made available to the public as part of the Commission's policy to Inform the nuclear Industry and