Abstract: STUDIES ON THE RECOVERY AND PURIFICATION OF URANIUM AND PLUTONIUM BY ELECTREFINING Ⅰ．DIRECT DISSOLUTION OF U-10Zr ALLOY IN　LIQUID CADMIUMYE YUXING; GAO YUAN （China Institute of Atomic Energy，P.O. Box 275（26），Beijing，102413）ABSTRACT he effects of time，temperature，total surface area of pellets and stirring on the solubilityand dissolution rate of uranium in liquid cadmium are studied．The experimental results show thatat 500℃ or 400℃ with the stirring rate of some 150r／min ，the solubilities of uranium in liquidcadmium are 2．2g and 0．4g，respectively. At the first 30 min，the dissolution rates of U-10Zr al-loy pellets are 0．32g／cm~2·h and 0．05g／cm~2·h，respectively．The suitable dissolution conditionsfor U-10Zr alloy pellets in liquid cadmium（the ratio of the quality of liquid cadmium to that ofthe pellets≈7）are：temperature，about 480℃；stirring rate，about 150r／min，time，4h.Key words U-10Zr alloy Dissolution Solubility Cadmium