A hydrogen absorption apparatus was installed for the experiment of hydrogen absorption as a basic procedure for the tritium immobilization. The basic experiment on the hydrogen absorption was conducted by using the zircaloy scrap and the sponge. The surface of the zircaloy scrap was activated and the equilibrium time on hydrogen absorption was determined. Morphology change of the zircaloy scrap was observed according to the progress of activation. The value of H/M measured under the hydrogen condition of 46 atm showed about 2.04 at 600℃ in case of the zircaloy scrap and about 2.01 at 400℃ in case of the zirconium sponge, respectively. These values were maximum allowable hydrogen storage capacity in zirconium.