Research progress on the hydrogen permeation behavior of the nuclear waste container–A mini review

A large amount of nuclear waste produced in the process energy utilization has always been a key problem to be solved urgently for safety. At present, “deep geological disposal” is feasible method and generally accepted by many countries. It “multi-barrier system” composed an artificial barrier, including solidified body, outer packaging material, buffer backfill natural barrier surrounding rock. During deep disposal, near-field environment, where corrosion container could happen, formed with continuous groundwater infiltration release much heat decay fission. same time, environment will become long-term reduction place because gradual consumption initially retained oxygen. The hydrogen evolution reaction dominant, so unpredictable embrittlement materials happen due absorption penetration. This study summarizes possibility carbon steel, titanium, their alloys from three aspects, namely, solubility, diffusion coefficient, embrittlement, which provides theoretical basis predicting life time scale.