Document: NUREG-0800
Document ID: 81256f55-72dd-4777-9472-f373c71c4554
Document Type: srp
Title: AC POWER SYSTEMS (ONSITE)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550065.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.1
CFR Part: 
CFR Title: 

Content:
), the duration for which the plant will be able to withstand or cope with, and recover from, a station blackout event, and the adequacy of dc system power supplies (e.g., batteries and chargers) that are not a part of the onsite dc power system reviewed under SRP Section 8.3.2 with respect to the specified station blackout event/duration. 4. Review of the adequacy of the environmental qualification of safety-related electrical equipment as part of its primary review responsibility for SRP Section 3.11. In particular, the reviewer determines the capability of safety-related electrical equipment to perform its intended safety functions when subjected to the effects of (1) accident environments such as loss-of-coolant accidents (LOCAs) and/or steam line breaks, (2) abnormal environments that may temporarily exceed equipment continuous duty design parameters such as temperature and humidity, (3) abnormal environments caused by degradation or loss of heating, ventilation, and/or air conditioning systems, (4) seismic shaking, and (5) normal design environments on redundant safety-related electrical equipment that does not include design diversity (e.g., redundant components manufactured and designed by the same supplier). In the review of other areas associated with the onsite power system, the reviewer will coordinate other branches' evaluations that interface with the overall review of the system. The listed SRP sections interface with this section as follows: 1. The organization responsible for the review of plant systems evaluates the adequacy of those auxiliary supporting systems that are vital to the proper operation and/or protection of the ac power system as part of its primary review responsibility for SRP Sections 9.4.1 through 9.4.5. This includes such systems as the heating, ventilation, and air conditioning systems provided to maintain a controlled environment for safety-related instrumentation and electric equipment. In particular, the organization