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:
f losing electric power from any of the remaining supplies as a result of, or coincident with, the loss of power generated by the nuclear power unit or the loss of power from the transmission network. Acceptability was based on the applicant's design of the d-c power systems meeting the guidelines of Regulaory Guide 1.6 positions D.1, D.2 and D.4, the guidelines of Regulatory Guide 1.32 and the guidelines of Regulatory Guide 1.75. 8.3.2-9 Rev. 2 - July 1981 5. The applicant has met the requirements of GDC 18, "Inspection and Testing of Electric Power Systems,"-with respect to the onsite d-c power system. The d-c power system is designed to be testable during operation of the nuclear power generating station as well as during those intervals when the station is shutdown. Acceptability was based on the applicant meeting test capability guidelines of Regulatory Guide 1.32 and the guidelines of Regulatory Guide 1.118. 6. The applicant has met the requirements of GDC 50, "Containment Design Bases," with respect to penetrations containing circuits of the safety and nonsafety related d-c power system. Containment electric penetrations have been designed to accommodate, without exceeding their design leakage rate, the calculated pressure and temperature conditions resulting from any loss-of-coolant accident concurrent with the maximum short-circuit current versus time condi- tion that could occur given single random failures of circuit over- load protective devices. This meets the positions of Regulatory Guide 1.63, V. IMPLEMENTATION The following is intended to provide guidance to applicants and licensees regarding the NRC staff's plans for using this SRP section. Except in those cases in which the applicant proposes an acceptable alternative method for complying with specified portions of the Commission's regulations, the method described herein will be used by the staff in Its evaluation of conformance with Commission regulations. Implementation schedules for conformance