Document: NUREG-0800
Document ID: f9d2d9cb-1d13-407e-ad7a-523fff64de06
Document Type: srp
Title: DC POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1007/ML100740391.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.2
CFR Part: 
CFR Title: 

Content:
was based on the applicant meeting Regulatory Position C.2.a of RG 1.32 and Regulatory Position C.1 of RG 1.81. 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 RG 1.6 and the guidelines of RGs 1.32, 1.75, 1.53, 1.128, 1.129, and 1.153. 8.3.2-19 Revision 4 - May 2010 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 capability guidelines of RG 1.32 and the guidelines of RGs 1.118, 1.129, and 1.153. 6. The applicant has met the requirements of GDC 50 with respect to penetrations containing circuits of the safety- and nonsafety-related dc 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 LOCA concurrent with the maximum short-circuit current versus time condition that could occur given single random failures of circuit overload protective devices. This meets the positions of RG 1.63. 7. The applicant has met the requirements of 10 CFR 50.63 with respect to the onsite dc power system. The dc power systems