A Study on the Postweld Heat Treatment Requirements for the Reactor Containment Building Liner Near Penetrations

摘要

The steel liner for an ASME Subsection CB concrete reactor pressure vessel and an ASME Subsection CC concrete containment serve the same function of providing a leaktight membrane effectively stopping the release of radioactive material. However, the examptions to mandatory Postweld Heat Treatment (PWHT) requirements specified for the steel liner in these two subsections are different. The PWHT exemptions outlined in ASME Subsection CC are more limiting than those outlined in ASME Subsection CB and appear to be equivalent to those specified for steel pressure vessels in ASME Subsection NE.