This invention arumino which shuts in the medium level radioactive waste fluid - regards boro-silicated glass. In addition as for this invention, in order the glass solidification additive and thing, that calcination ones and the glass solidification additive which add calcination and the glass solidification additive of the said waste fluid to said calcination ones, to cause glass melting, the fact that the fact that it melts in the cooling crucible, and the glass which is melted are cooled in order arumino - to cause boro-silicated glass, is included, it regards the processing method of the medium level radioactive waste fluid. Selective figure It is not
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