Hydrogen recovery unit is developed for the molten salt loop Orosh
2
i-1. Pure Ni was selected as hydrogen
permeation material due to its industrial maturity of fabrication technology and goodcompatibility with molten
salt in fusion reactor condition. No significant degradation of hydrogen permeabilityof the pure Ni during the
fabrication process. Advanced hydrogen permeation materials, such as Pd, V, Nb, and Ta, maintaining higher
hydrogen permeability are also discussed to develop more compact hydrogen recovery systems.