Non-EAC Corrosion Concerns Affecting Life Extension of Light Water Reactors

摘要

Corrosion is a major service life limiting mechanism for both pressurized water reactors (PWRs) and boiling water reactors (BWRs). While most of the corrosion research emphasis in the nuclear corrosion community has been focused on environmentally-assisted cracking (EAC) of austenitic stainless steels and nickel-base alloys and weld metals, in particular stress corrosion cracking (SCC), there are other corrosion phenomena that seriously affect plant life extension that cannot be ignored. This paper presents three other important corrosion areas, i.e., general corrosion of the light water reactor (LWR) containments, flow-accelerated corrosion of carbon steel piping systems and the corrosion of buried piping.