Stabilization and volume reduction Of spent radioactive ion-exchange resins (IERs) were studied. Stabilization technology includes volume reduction with wet Chemical oxidation process and immobilization of the residue...Stabilization and volume reduction Of spent radioactive ion-exchange resins (IERs) were studied. Stabilization technology includes volume reduction with wet Chemical oxidation process and immobilization of the residue into cement. Under suitable conditions, the exhaussted radioactive ion-exchange resins were dissolved successfully in a H2,O2-Fe2+/Cu2+ catalytic oxidation system (Fenton reagent). The analytical results indicated that the radioactive nuclides loaded in the resins were concentrated in decomposed solution and solid residues. The process parameters of wet chemical oxidation and solidification were also obtained. The decomposition ratios were 100% and more than 90% for canon and anion IERs respectively. The waste volume was decreased by 40% compared with that of original spent resins.展开更多
The policy and principles on management of radioactive wastes are stipulated.Cement solidification and bituminization unit has come into trial run. Solid radioactive waste is stored in tentative storage vault built...The policy and principles on management of radioactive wastes are stipulated.Cement solidification and bituminization unit has come into trial run. Solid radioactive waste is stored in tentative storage vault built in each of nuclear faCilities. Seventeen storages associated with applications of nuclear technology and radioisotopes have been built for provinces. Disposal of low and intermediate level radioactive wastes pursues the policy of 'regional disposal'. Four repositories have been planned to be built in northwest, southwest, south and east China respectively. A program for treatment and disposal of high level radioactive waste has been made.展开更多
文摘Stabilization and volume reduction Of spent radioactive ion-exchange resins (IERs) were studied. Stabilization technology includes volume reduction with wet Chemical oxidation process and immobilization of the residue into cement. Under suitable conditions, the exhaussted radioactive ion-exchange resins were dissolved successfully in a H2,O2-Fe2+/Cu2+ catalytic oxidation system (Fenton reagent). The analytical results indicated that the radioactive nuclides loaded in the resins were concentrated in decomposed solution and solid residues. The process parameters of wet chemical oxidation and solidification were also obtained. The decomposition ratios were 100% and more than 90% for canon and anion IERs respectively. The waste volume was decreased by 40% compared with that of original spent resins.
文摘The policy and principles on management of radioactive wastes are stipulated.Cement solidification and bituminization unit has come into trial run. Solid radioactive waste is stored in tentative storage vault built in each of nuclear faCilities. Seventeen storages associated with applications of nuclear technology and radioisotopes have been built for provinces. Disposal of low and intermediate level radioactive wastes pursues the policy of 'regional disposal'. Four repositories have been planned to be built in northwest, southwest, south and east China respectively. A program for treatment and disposal of high level radioactive waste has been made.
