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:
. 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 components associated with the multi-unit design are housed in physically separate seismic Category I structures and are not shared between units. Acceptability was based on the applicant meeting Regulatory Guide 1.32, position C.2.a, and guidelines of Regulatory Guide 1.81, position C.1. 4. The applicant has met the requirements of GDC 17, "Electric Power Systems," with respect to the onsite dc power system's (a) capacity and capability to permit functioning of structures, systems, and components important to safety; (b) the independence and redundancy to perform their safety function assuming a single failure; and (c) provisions to minimize the probability of 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 dc power systems meeting the guidelines of Regulatory Guide 1.6, positions D.1, D.2, and D.4 and the guidelines of Regulatory Guides 1.32, and the guidelines of Regulatory Guide 1.75, 1.128, and 1.153.115 5. The applicant has met the requirements of GDC 18, "Inspection and Testing of Electric Power Systems," with respect to the onsite dc power system. The dc power system is designed to be testable during operation of the nuclear power generating station as well 116 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 Guides 1.118 and 1.153.117 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 dc power system.