Development of MHI's induction melting system for low level radio active solid waste treatment

摘要

Mitsubishi Heavy Industries, Ltd.. (MHI hasdeveloped melting facilities that reduce radioactive waste volume.The system uses a high-frequency induction to separately meltnonmetallic waste in SUS containers and metallic waste. Use ofsystem extends refractory life. To validate system feasibility, majorcomponents were tested with the following results: (1) Two 200-liter drum cans of molten solid waste are produced per work day,(2) Radioactivity in molten soild was homogeneous with acoefficient of variation <=10 percent, clarifying residue properties,(3) The radioactive decontamination factor of off-gas facilities—DF= Activity to system ÷ Activity at the system exit--exceeded10~7. We confirmed system to fill the requirements for moltensoild waste and have the merit of high volume-reduction and long-life refractory.