Glass-ceramic waste forms for immobilization of Cs trapping filters

Cesium gas is evolved from spent nuclear fuel during the head-end process of Pyroprocess. Capture of Cs has been performed with aluminosilicate-based ceramic filters at high temperatures. This study presents a simple and novel scheme to immobilize the Cs trapping filters in glass-ceramic waste forms. The Cs-SA filter was transformed to monolithic waste forms for the final storage of Cs. A glass frit was synthesized and mixed with the Cs-SA filter, which was heat-treated at 1000¶C for 3 h to for the synthesis of waste forms. Characterization revealed that pollucite was the major Cs phase when the waste loading was not less than 30wt%