Document: NUREG-0800
Document ID: 33d57664-26a3-4d30-807d-2ce020de062a
Document Type: srp
Title: STATION BLACKOUT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1007/ML100740424.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.4
CFR Part: 
CFR Title: 

Content:
e requirements of 10 CFR 50.63 regarding the AAC source are satisfied, the staff will evaluate and verify the applicant=s submittal on SBO regarding the following issues: A. In accordance with Section C.3.3.5 of RG 1.155, the AAC power source should be capable of supplying power, as necessary, to all loads that are necessary for safe shutdown (non-DBA) in the event of an SBO at any nuclear unit it is credited to serve. The AAC power source should have sufficient capacity to operate the systems necessary for coping with an SBO for the time necessary to bring and maintain the plant in a safe-shutdown condition. The plant systems, functions, and features discussed in Sections C.2 and C.3.3.1 to C.3.3.4 of RG 1.155 should be appropriately addressed as safe-shutdown non-DBA loads (including loads associated with any alternative or added capacity battery charging, water, or air sources to handle SBO). For new applications, the AAC source should be of diverse design (with respect to onsite sources); have adequate capacity, independence, and reliability; and have capability for powering at least one complete set of normal safe-shutdown loads. At sites where units share onsite emergency sources, the AAC power sources should have the capacity and capability to ensure that all units can be brought to and maintained in a safe-shutdown (non-DBA) condition. B. The staff reviews the independence of the AAC power source under SRP Section