| Insights | Nuclear Update Site

Regulatory Guides

The NRC is issuing Revision 3 of Regulatory Guide (RG) 1.124, “Service Limits and Loading Combinations for Class 1 Linear-Type Supports,” and Revision 3 of RG 1.130, “Service Limits and Loading Combinations for Class 1 Plate-and-Shell-Type Supports.” These revisions include an update of the Edition and Addenda of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code. Regulatory Guides 1.124 and 1.130 delineate levels of service limits and appropriate combinations of loadings associated with normal operation, postulated accidents, and specified seismic events for the design of Class 1 linear-type component and piping supports, and Class 1 plate-and-shell-type component and piping supports, respectively.