NEW TECHNOLOGY SCHEME FOR HANDLING AND BURIAL FOR THE RADIOACTIVE EVAPORATOR BOTTOM OF THE PWR PAKS

At the Department of Chemical Technology we developed a complex technology for handling the radioactive evaporator bottom in Paks before burial. The basic concept of the technology is the primary selective separation of the long-lived radioisotopes and then the partial recovery of the boric acid content of the inactive solution. The selective separation is accomplished by using iom exchange and adsorption materials and reagents and the partial recovery of the boric acid content of the inactive solution. The selective separation is accomplished by using ion exchange and adsorption materials and reagents and the partial recovery of the boric acid is carried out by neutralisation with carbon dioxide combined with a purification step involving ammonium-ion exchange. The overall volume reduction factor is about 96