Document: NUREG-0800
Document ID: ac4cde5a-7464-48b8-9067-860c672cbb68
Document Type: srp
Title: STATION BLACKOUT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550061.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8.4
CFR Part: 
CFR Title: 

Content:
power sources. vi. For EDGs used as an AAC source, the engine support systems should conform with the relevant criteria used to evaluate them under SRP Sections 9.5.4 through 9.5.8. 4. Procedures and Training. The staff will review procedures and training to ensure that they conform to the guidance in Sections C.1.3, C.2, and C.3.4 and Appendix B to RG 1.155 and include all operator actions necessary to do the following: A. Cope with the occurrence of an SBO for the specified coping duration during all modes of plant operation and include actions necessary to place AAC power sources in service (if used) and maintain acceptable environmental conditions for equipment necessary to mitigate the event. Procedures developed to cope with an SBO should be integrated with the plant-specific technical guidelines and 8.4-15 March 2007 emergency operating procedures developed using the emergency operating procedure upgrade program established in response to Supplement 1 of NUREG-0737. The task analysis portion of the emergency operating procedure upgrade program should include an analysis of instrumentation adequacy during an SBO. B. Restore standby (Class 1E) power sources when the EAC power system is unavailable. C. Restore offsite power sources and use of nearby power sources (which may include nearby or onsite gas turbine generators, portable generators, hydrogenerators, and black start fossil power plants) in the event of a LOOP. As a minimum, the reviewer should consider the following potential causes for a LOOP: i. Grid undervoltage and collapse. ii. Weather-induced power loss. iii. Preferred power distribution system faults that could result in the loss of normal power to essential switchgear buses. This includes such failures as distribution system hardware, switching and maintenance errors, and lightning-induced faults. D. Actions necessary to restore normal long-term core cooling/decay heat removal once ac power is restored. In addition, the reviewer should