Document: NUREG-0800
Document ID: a2680f96-0e15-402d-89ab-688ff09806a8
Document Type: srp
Title: with respect to the specified station blackout event/duration.13
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070497.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.3.2
CFR Part: 
CFR Title: 

Content:
rol room. As a minimum, monitoring should include the voltage, current, frequency, and circuit breaker position. d. The AAC source components are enclosed within structures that conform to the Uniform Building Code. Electrical cables connecting the AAC power source to the shutdown buses are protected against the events that affect the preferred ac power system. This may be accomplished by use of buried cables or by other appropriate methods. e. Nonsafety-related AAC power source(s) and associated dedicated dc system(s) should meet the quality assurance guidance of Position 3.5, Appendix A, and the specifications identified in Appendix B of Regulatory Guide 1.155. f. The AAC power system is equipped with a dedicated dc power system that is electrically independent from the blacked-out unit's preferred and Class 1E power systems during station blackout and is of sufficient capability and capacity for operation of dc loads associated with the AAC source for the maximum required duration of AAC source operation. g. The AAC power system is equipped with a starting system (and motive energy source for starting) that is independent from the blacked-out unit's preferred and Class 1E ac power systems during station blackout. h. The AAC power system is provided with a fuel supply that is separate from the fuel supply for the onsite emergency ac power system. A separate day tank, supplied from a common storage tank, is acceptable, if the fuel is sampled and analyzed using methods consistent with applicable standards prior to its transfer to the day tank. 8.2-25 DRAFT Rev. 4 - April 1996 i. If the AAC power source and an emergency onsite ac power source are identical, procedures are provided to assure that active failures of each identical power source will be evaluated for common cause applicability and that corrective action has been taken to reduce subsequent failures. j. The AAC power system is capable of operating during and after a station blackout without any support