METHOD FOR VITRIFICATION OF HIGH-LEVEL RADIOACTIVE LIQUID WASTE FOR HIGH VOLUME REDUCTION

摘要

PROBLEM TO BE SOLVED: To obtain vitrified waste which is homogeneous and chemically stable over a long period of time even if conventional glass materials are used by heightening the concentration of the waste in vitrified waste to 45 to 55 wt.% and decrease costs of storage and geological disposal by curbing heat evolution of vitrified waste.;SOLUTION: On the way of a route for supplying high-level radioactive liquid waste 10 to a glass melting furnace 12; a molybdenum removal unit 14 for sequentially separating solid molybdate and molybdenum dissolving as ions from the waste 10 and then an exothermic element removal unit 16 for separating cesium and strontium, exothermic elements, dissolving as ions are laid out. By supplying the liquid waste after the treatment for separating and removing molybdenum, cesium and strontium from the high-level radioactive liquid waste 10 in a series of processes in their supply route to the glass melting furnace 12, vitrified waste with a high volume reduction and where the concentration of waste is 45 to 55 wt.% is obtained through a treatment for mixing the liquid waste with glass materials and melting and solidifying it.;COPYRIGHT: (C)2008,JPO&INPIT