Melt-processing method for miscellaneous radioactive solid wastes

Miscellaneous radioactive solid wastes containing waste components of various kinds of materials are charged into a water-cooling type cold crucible induction melting furnace disposed in high frequency coils. High frequency electric current is supplied to the high frequency coils which surrounds the melting furnace to melt the miscellaneous wastes by induction-heating. In this case, plural kinds of currents of high frequencies suitable to induction-heating the various kinds of materials contained in the miscellaneous radioactive solid wastes are supplied to the high frequency coils in the present invention. Therefore, the most effective melting performance can be provided. As a result, even miscellaneous radioactive solid wastes having various kinds of mixed materials can be melted and processed uniformly, rapidly and efficiently entirely. In addition, since both materials of metals and glasses in the miscellaneous solid radioactive wastes can be melted as main materials, they are not limited to the mixing ratio of metals and glass in the wastes. (T.M.)