ASME NTB-4-2021

ASME NTB-4-2021 PDF

The purpose of this document is to provide background information on the scope, development, and verification of elevated-temperature design and construction rules as defined in the ASME Boiler and Pressure Vessel Code ("BPVC"), Section III Rules for Construction of Nuclear Facility Components, Division 5 High Temperature Reactors Subsection HH, Class A Nonmetallic Core Support Structures, Subpart A Graphite Materials, 2017 edition. The general requirements applicable to nonmetallic core components are discussed in BPVC Subsection HA General Requirements, Subpart B, Graphite Materials.