Patent Number: 
Section: claims

1. A method for separating fission products, comprising:subjecting a spent electrolyte produced in a pyro-reprocessing process to a phosphate conversion processing to obtain a processing target substance;passing the processing target substance through a separating material comprising an iron phosphate glass at a temperature of not more than a softening point of the iron phosphate glass in order to remove insoluble fission products included in the processing target substance by filtration with the separating material and to sorb fission products in solution to the separating material for separation; andusing the iron phosphate glass holding the fission products as a waste vitrification material. 2. The method for separating fission products according to claim 1, wherein an atmosphere of the processing target substance is adjusted by an inert gas supplied from a pressurization system, and simultaneously applying pressure to a liquefied processing target substance so that passage of the separating material can be accelerated by the pressure added to the liquefied processing target substance. 3. An apparatus for separating fission products used for implementation of the method for separating fission products according to claim 1, the apparatus comprising:a separator body comprising a cylindrical separation container filled with a separating material;a feed opening for a processing target substance opened in an upper portion of the separation container;a refined liquid receiver tank that communicates with a lower portion of the separation container;a pressurization system that can apply pressure to the processing target substance supplied to the separation container;a suction system connected with the refined liquid receiver tank; anda heating element that controls a temperature within the apparatus; wherein the separating material comprises an iron phosphate glass. 4. The apparatus for separating fission products according to claim 3, wherein as composition of the iron phosphate glass, an Fe/P ratio is 0.15 to 0.75; andthe iron phosphate glass is used as the separating material in a shape of powers or a shape of fibers, or used as the separating material by heating the powders or fibers to a softening point of the iron phosphate glass and molding and processing the powders or fibers so as to have a cartridge form. 5. An apparatus for separating fission products used for implementation of the method for separating fission products according to claim 2, the apparatus comprising:a separator body comprising a cylindrical separation container filled with a separating material;a feed opening for a processing target substance opened in an upper portion of the separation container;a refined liquid receiver tank that communicates with a lower portion of the separation container;a pressurization system that can apply pressure to the processing target substance supplied to the separation container;a suction system connected with the refined liquid receiver tank; anda heating element that controls a temperature within the apparatus; wherein the separating material comprises an iron phosphate glass. 6. The apparatus for separating fission products according to claim 5, wherein as composition of the iron phosphate glass, an Fe/P ratio is 0.15 to 0.75; andthe iron phosphate glass is used as the separating material in a shape of powers or a shape of fibers, or used as the separating material by heating the powders or fibers to a softening point of the iron phosphate glass and molding and processing the powders or fibers so as to have a cartridge form.