Regulatory Guide: Guidelines for Lightning Protection for Production and Utilization Facilities

The U.S. Nuclear Regulatory Commission (NRC) is issuing Revision 1 to Regulatory Guide (RG), 1.204, "Guidelines for Lightning Protection for Production and Utilization Facilities." This regulatory guide (RG) revision endorses, with clarifications and exceptions, the methods described in four Institute of Electrical and Electronics Engineers (IEEE) Standards (Std.). This revision also addresses one National Fire Protection Association standard and one Underwriters Laboratory standard as useful secondary references for demonstrating compliance with the applicable NRC regulations for adequate lightning protection of safety-related systems, structures, and components.