R&D of Lifetime Extension for Primary Materials by Active Chemistry Control for Coolant Helium: Corrosion Tests of Heat Resistant Alloy

摘要

Ni-base heat-resistant alloys are used for the structural components in gas cooled reactors and exposed to high-temperature helium gas environment. The degradation issues of the material like oxidation and creep are primary concerns for the plant operation and further development of the alloys to be used in Very High Temperature Reactor (VHTR) and Gas-cooled Fast Reactor (GFR). In this investigation, a corrosion testing facility was fabricated in order to investigate oxidation behavior of heat resistant alloys in high-temperature helium environments.