Energia i regulacje · 06/10/2014

Nonmetallic Thermal Insulation for Austenitic Stainless Steel

The U.S. Nuclear Regulatory Commission (NRC) is issuing for public comment draft regulatory guide (DG), DG-1312, "Nonmetallic Thermal Insulation for Austenitic Stainless Steel," also known as Regulatory Guide (RG) 1.36. The NRC is proposing to revise the guidance toreflect the most current versions of voluntary consensus standards since the initial publication of RG 1.36 in February 1973. The guide describes methods and procedures that the staff of the NRC considers acceptable when selecting and using nonmetallic thermal insulation in the stainless steel portions of the reactor coolant pressure boundary and other systems, in order to minimize any contamination that could promote stress-corrosion cracking. This RG applies to light-water- cooled reactors.