Document: NUREG-0800
Document ID: 9fa7092c-7628-402d-9028-6601d5f5fdfb
Document Type: srp
Title: DC POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550063.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.2
CFR Part: 
CFR Title: 

Content:
ance designation of Class 1E. 2. The applicant has met the requirements of GDC 4 with respect to structures, systems, and components of the dc power system that are capable of withstanding the effects of missiles and environmental conditions associated with normal operation and postulated accidents because of an adequate plant design and an equipment qualification program. 3. The applicant has met the requirements of GDC 5 with respect to structures, systems, and components of the dc power system. Physically separate seismic Category I structures house the dc power system and components associated with the multi-unit design, and they are not shared between units. Acceptability was based on the applicant meeting Regulatory Position C.2.a of Regulatory Guide 1.32 and Regulatory Position C.1 of Regulatory Guide 1.81. 8.3.2-19 Revision 3 - March 2007 4. The applicant has met the requirements of GDC 17 with respect to the onsite dc power system’s (a) capacity and capability to permit the functioning of structures, systems, and components important to safety, (b) the independence and redundancy necessary to perform their safety functions, 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 Positions D.1, D.2, and D.4 of Regulatory Guide 1.6 and the guidelines of Regulatory Guides 1.32, 1.75, 1.53, 1.128, 1.129, and 1.153. 5. The applicant has met the requirements of GDC 18 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 as during those intervals when the station is shut down. Acceptability was based on the applicant meeting the test