To provide a canister for melting which can prevent overflow even in the case of the melting treatment for radioactive miscellaneous solid wastes containing a low-melting substance.
An overflow prevention ring 3 forming an inner marquee part 2 is placed on the edge of an upper opening of the canister for melting for the melting and solidifying treatment of the radioactive miscellaneous solid wastes. The overflow prevention ring 3 has a structure where it is mounted on the edge of the upper opening of the canister through adhesion or fitting. It is also acceptable if a material for the overflow prevention ring 3 can withstand the melting temperature of the wastes. Especially, the use of the same material as that for the canister can prevent thermal stress cracking.
Akio Najima
Fumio Yamamoto
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