Pre-Earthquake Planning, Shutdown, and Restart of a Nuclear Power Plant Following an Earthquake

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The U.S. Nuclear Regulatory Commission (NRC) is issuing for public comment draft regulatory guide (DG), DG-1337, "Pre-Earthquake Planning, Shutdown and Restart of a Nuclear Power Plant Following an Earthquake." This proposed guide is a merger of two closely related guides, namely, regulatory guide (RG) 1.166, "Pre-Earthquake Planning and Immediate Nuclear Power Operator Postearthquake Actions" and RG 1.167 "Restart of a Nuclear Power Plant Shutdown by a Seismic Event." Upon completion of the merger of the two guides, RG 1.167 will be withdrawn. DG-1337 incorporates lessons learned following shutdown and restart of nuclear power plants due to earthquake ground motion and post-earthquake evaluations since issuance of the two RGs in 1997.