Vitrification of dry active waste using pilot scale cold crucible melter

A simulated mixed Dry Active Waste(DAW) has been vitrified using a pilot scale Cold Crucible Melter(CCM). A processability, characteristics of the combustion and dust generation of the DAW in the CCM, and glass properties were investigated and evaluated. The glass melt was maintained at around 1,150 .deg. C constantly and the mixed DAW was fed into the CCM at the feed rate of 10, 15 and 20kg/h during the test. The viscosities of the base and the final glass were well within the desired range. There was electrical conductivity difference between the base glass and the final glass and it was also within the desired range, as 0.33 S/cm. A stable combustion process of the DAW was performed during the test. And only 3.03% of the dust was generated from the cold crucible melter. All regulated emission gases in the stack were well below the environmental regulation limits. The physical properties and chemical durability of the waste glass were satisfactory the required quality