Abstract: THE SEPARATION OF(210)Po FROM LARGE AMOUNT OF IRRADIATED Bi_2O_3 TARGETSCui Haiping; Zhang Haiyan;Xu Rongwang;Cai Shanyu (Department of Isotope, China Institute of Atomic Energy, Beijing 102413)Abstract:Based on tile electrochemical replacement reaction between bismuth metal and 210Po4+, the polonium can be separated from irradiated Bi2O3 targets.In order to get large amount of 210Po material,the spontaneous deposition technique combined Bi powder stirring with Bi powder column is adopted in the preparation of 210Po-Be start-up source rod for 300 MW Qinshan Nuclear Power Plant. The extraction efficiency of polonium from irradiated Bi2O3 targets is up to 98. 6%.Keywords:~(210)Po~(210)Po-Bi separation spontaneous deposition electrochemical exchange