PURIFICATION OF URANIUM-PLUTONIUM EXTRACT OF VVER-1000 SPENT NUCLEAR FUEL FROM FISSION PRODUCTS BY LIQUID CHROMATOGRAPHY

摘要

The purification of VVER-1000 uranium-plutonium extract from fission products by liquid chromatography was tested. The process was conducted in a liquid chromatography column filled with silica gel whose pores were impregnated with nitric acid at concentration 1 mol/L. The purification of the uranium-plutonium extract was performed in two stages. The highest purification factors were obtained from Eu-154 - 2500 and Cs-137 - 3 center dot 10(4). A high purification factor of 12 was obtained for Am-241. The efficacy of purification of the extract from the indicated fission products was observed for extract flow/water solution ratio equal to at least 40.