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:
wn or AAC equipment requiring manual operation. L. Plant operating procedures should consider the effects of ac power loss on area access, as well as the need to gain entry to other locked areas where remote equipment operation is necessary. M. Plant operating procedures should consider the effects of a loss of ac power on communications capabilities, including the potential for a loss of communications with offsite agencies. N. Plant operating procedures should consider the loss of heat tracing effects for equipment necessary to cope with an SBO. O. To provide assurance that the NPP operator will be kept aware of changes in the plant switchyard and offsite power grid, plant or site procedures should establish appropriate communication protocols between the NPP and its transmission system operator (Ref. 15). With regard to SBO, these protocols should aid the operator in determining the following: i. The performance of grid-risk-sensitive maintenance activities (such as surveillances, postmaintenance testing, and preventive and corrective maintenance) that could increase the likelihood of an SBO or impact the plant’s ability to cope with an SBO, such as out-of-service risk-significant equipment (e.g., an EDG, a battery, a steam-driven pump, an AAC power source) ii. The availability of local power sources and transmission paths that could be made available to resupply the plant following a LOOP event 5. QA and Specification Guidance for SBO Equipment That Is Not Safety-Related. The staff will review QA activities and specifications for non-safety-related equipment used to meet the requirements of 10 CFR 50.63 to ensure that they conform to the recommendations in Section C.3.5 and Appendix A to RG 1.155. The review should also determine that systems and equipment used to meet the requirements of 10 CFR 50.63 conform to the system and station equipment specification recommendations of Appendix B to RG 1.155. The NRC staff will accept the nonsafety systems identified