The blanket tritium recovery system using the hydrogen pump with solid electrolyte membrane has been proposed by the present authors. Perovskite-type ceramic such as SrCe0.95Yb0.05O3-a, is one of the candidate protonic conductor for hydrogen pump and its ionic hydrogen transportation properties are being investigated. Deuterium transportation properties were investigated and were compared with H2 to understand the isotope effect. The basic hydrogen isotope transportation property of SrCe0.95Yb0.05O3-a, its technical feasibility, and issues for further development toward practical devices were revealed.