To develop high-efficiency and economical hydrogen isotope purification and recovery processes for a tritium extraction system in a fusion reactor,hydrogen extraction characteristics of an electrochemical hydrogen pump using a one-end closed tube made of proton-conducting ceramic CaZr0.9In0.1O3-α(effective electrode area was 160 cm2)were studied.The hydrogen pumping characteristics were evaluated over the To develop high-efficiency and saving hydrogen isotope purification and recovery processes for a tritium extraction system in a fusion reactor, hydrogen extraction characteristics of an electrochemical hydrogen pump using a one-end closed tube made of proton-conducting ceramic CaZr0.9In0.1O3- α (effective electrode area was 160 cm2) were studied. Hydrogen pumping characteristics were evaluated over the