Document: NRC Regulatory Guide
Document ID: 37f53017-d71c-4f3c-a2a4-ab67a8270066
Document Type: regulatory_guide
Title: Pre-Earthquake Planning, Shutdown, and Restart of a Nuclear Power Plant Following an Earthquake (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1826/ML18268A185.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.166
CFR Part: 
CFR Title: 

Content:
of information unless the document requesting or requiring the collection displays a currently valid OMB control number. DG-1337, Page 4 B. DISCUSSION Reason for Revision This guide merges two related RGs—RG 1.166, “Pre-Earthquake Planning and Immediate Nuclear Power Operator Postearthquake Actions,” issued March 1997 (Ref. 8), and RG 1.167 “Restart of a Nuclear Power Plant Shut Down by a Seismic Event,” issued March 1997 (Ref. 9)—into one and revises their technical content. The staff decided to combine these existing RGs because they are similar in nature and contain overlapping guidance. Both guides reference and endorse the same industry guidelines, which more recent industry guidance has superseded. The merged RG incorporates lessons learned following the shutdown and restart of nuclear power plants in response to earthquake ground motion and post-earthquake evaluations since issuance of the two RGs in 1997, through endorsement of ANSI/ANS-2.10-2017, “Criteria for Retrieval, Processing, Handling, and Storage of Records from Nuclear Facility Seismic Instrumentation” (Ref. 10), and ANSI/ANS-2.23-2016, “Nuclear Power Plant Response to an Earthquake” (Ref. 11), with exceptions and clarifications. Background The NRC endorsed Electric Power Research Institute (EPRI) NP-6695, “Guidelines for Nuclear Power Plant Response to an Earthquake,” dated December 1, 1989 (Ref. 12), in the initial version of RG 1.166 (Rev. 0) and RG 1.167 (Rev. 0), issued in 1997. Following the issuance of EPRI NP-6695 in 1989, a significant amount of experience has been gained on the effects of earthquakes on nuclear power plants worldwide and the actions needed to restart a nuclear power plant after an earthquake. Based on these lessons learned, EPRI significantly updated EPRI NP-6695 and published it in 2013 as EPRI Report 3002000720, “Guidelines for Nuclear Plant Response to an Earthquake” (Ref. 13). In addition, experience has been gained from the shutdown and