Protection Against Extreme Wind Events and Missiles for Nuclear Power Plants

The U.S. Nuclear Regulatory Commission (NRC) is issuing for public comment draft regulatory guide (DG), DG-1313, ``Protection Against Extreme Wind Events And Missiles For Nuclear Power Plants.'' This proposed guide has been revised to incorporate additional information identified since revision 1 of Regulatory Guide (RG) 1.117 was issued. The proposed revision describes an approach that the staff of the NRC considers acceptable for identifying those structures, systems, and components (SSCs) of light-water-cooled reactors that should be protected from the effects of the worst case extreme winds and wind-generated missiles, and remain functional.