Document: NUREG-0800
Document ID: 8e754440-b70e-4b8a-9816-b4a64b631220
Document Type: srp
Title: Initial – February 2012
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1136/ML113640138.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8
CFR Part: 
CFR Title: 

Content:
sting an extension of the onsite or offsite AOT should either install permanently, or make available on a temporary basis, a supplemental AC source capable of powering the inoperable onsite or offsite power source bus LOOP loads during the period of AOT extension. Although this extended AOT is allowed for pre-planned maintenance activities, it could be used for corrective maintenance on a limited base, provided the licensee meets risk-informed criteria, the maintenance rule availability/reliability requirements, and the reactor oversight process performance indicator criteria for availability/reliability. Although the installation of a supplemental power source could be temporary for only the time duration of the AOT, a permanent source would maintain multiple independent AC sources capable of providing power to necessary equipment needed for safe shutdown and could also reduce the risk of core damage frequency due to a LOOP. C. REFERENCES 1. RG 1.93, December 1974, “Availability of Electric Power Sources” 2. RG 1.174, May 2011, “An Approach for Using Probabilistic Risk Assessment in Risk-Informed Decisions on Plant-Specific Changes to the Licensing Basis” 3. RG 1.177, May 2011, “An Approach for Plant-Specific, Risk-Informed Decision-making: Technical Specifications” 4. RG 1.200, March 2009, “An Approach for Determining the Technical Adequacy of Probabilistic Risk Assessment Results for Risk-Informed Activities.” 5. NUREG-1784, December 2003, “Operating Experience Assessment – Effects of Grid Events on Nuclear Power Plant Performance” 6. RG 1.155, August 1988, “Station Blackout” 7. Commission Policy Statement: “Use of Probabilistic Risk Assessment Methods In Nuclear Regulatory Activities; Final Policy Statement” (60 Federal Register 42622, August 16, 1995) 8-8-7 Initial - February 2012 PAPERWORK REDUCTION ACT STATEMENT The information collections contained in the Standard Review Plan are covered by the requirements of 10 CFR Part 50 and