Document: NRC Regulatory Guide
Document ID: 9a8db182-3194-4663-aeb3-64f2e4edd6aa
Document Type: regulatory_guide
Title: Availability of Electric Power Sources (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1008/ML100840581.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.93
CFR Part: 
CFR Title: 

Content:
ne less than the LCO. If the available inverters are one less than the LCO, power operation may continue for a period that should not exceed the 24 hour time period specified in the standard technical specifications. If the affected inverter is restored within this time period, unrestricted operation may resume. If not, the licensee should shut down the plant in accordance with plant-specific technical specifications. D. IMPLEMENTATION The purpose of this section is to provide information on how applicants and licensees may use this guide and information regarding the NRC’s plans for using this Regulatory Guide. In addition, it describes how the NRC staff has complied with the Backfit Rule, 10 CFR 50.109 and any applicable finality provisions in 10 CFR Part 52. The regulatory positions in this draft guide are based on the grid operator’s capability to ensure the adequacy of the offsite power system through contingency analysis and plant design features. Based on the licensee’s response to GL 2006-02, existing standard and plant-specific technical specifications, and the requirements of 10 CFR 50.63, “Loss of all Alternating Current Power” (Ref. 10) and 50.65, the staff believes that this regulatory guide reflects the majority of current regulatory practices and may be used when evaluating compliance for operating nuclear power plants with a Safety Evaluation Report issued after July 1, 1974. Applicant and Licensees’ Use Applicants and licensees may (i.e., voluntarily) use the information in this regulatory guide to develop applications for initial licenses, amendments to licenses, or other requests for NRC regulatory approval (e.g., exemptions). Licensees may use the information in this regulatory guide for actions which do not require prior NRC review and approval (e.g., changes to a facility design under 10 CFR 50.59 which do not require prior NRC review and approval). Licensees may use the information in this Regulatory Guide or applicable parts to