Computational study of solute effects in tungsten under irradiation

Suzudo, Tomoaki   

Although tungsten attracts attention as candidates for plasma facing materials in nuclear fusion reactors, hydrogen radioactive isotopes in plasma may be captured by irradiation defects in this material, leading to a serious problem. Therefore, it is important to suppress irradiation defect accumulation in tungsten materials, and a possible solution is to add alloy elements that suppress the defects. For this reason, we searched for optimum alloying elements using first principles calculation and kinetic Monte Carlo method, and the result suggested that chromium and vanadium may be promising candidates.