INCORPORATION OF PRECIPITATE FROM TREATMENT OF MEDIUM-LEVEL LIQUID RADIOACTIVE WASTE INTO GLASS MATRIX OR CERAMICS TOGETHER WITH HIGH-LEVEL LIQUID WASTE.

Precipitation and separation of the radioactive matter from the bulk liquid, has been developed at Kernforschungszentrum Karlsruhe (KfK) as an alternative to direct solidification of Medium Level Liquid Waste (MLLW)-concentrates by bituminization or cementation. More than 90% of the total radioactivity is removed from MLLW stream by absorbing it on surface rich precipitate, which is ultimately vitrified with HLLW. An addition of MLLW-precipitate to a matrix (glass or glass-ceramic), to which HLLW has already been incorporated, showed no significant decrease in product quality or increase in product amount.