Abstract
A thermowell dissembled from an on-going high-temperature rotating kiln part from a cold crucible induction melter (CCIM) system was characterized, and the underlying mechanism governing its hot corrosion and degradation behavior was further studied. Results indicate that the high-temperature interaction between the thermowell and the nuclear waste stream leading to the formation of oxides with different valence states mainly composed of FeCrO2, Fe2O3, FeO and NiO, with the diffusion of the simulated radionuclides into the lattice structure The on-site corrosion and phase degradation are thermodynamically driven by the outward growth of the oxidation film.
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