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|1. (WO2018221811) TREATMENT METHOD AND TREATMENT APPARATUS FOR URANIUM HEXAFLUORIDE RESIDUE WITHIN CYLINDER, USING GAS PHASE REACTION|
|Applicants:||KEPCO NUCLEAR FUEL CO., LTD.
|Title:||TREATMENT METHOD AND TREATMENT APPARATUS FOR URANIUM HEXAFLUORIDE RESIDUE WITHIN CYLINDER, USING GAS PHASE REACTION|
The present invention relates to a treatment method and a treatment apparatus for UF6 heel, using a gas phase reaction. A specific treatment method comprises the steps of: (1) vaporizing UF6 heel; (2) generating solid UO2F2 by using the vaporized UF6 gas; (3) separating the solid UO2F2 from a by-product gas; and (4) separating hydrogen fluoride from the by-product gas. The treatment apparatus can comprise: (1) a vaporizer used only for vaporizing UF6 heel; (2) a reactor connected to the vaporizer so as to generate UO2F2 by using the UF6 gas generated at the vaporizer; (3) a solid/gas separator connected to the reactor so as to separate the solid UO2F2, which is generated in the reactor, from the by-product gas; (4) a heat exchanger connected to the solid/gas separator so as to allow the by-product gas, which is supplied from the solid/gas separator, to pass therethrough and be condensed into liquid; and (5) a liquid/gas separator for separating the hydrogen fluoride liquid, which is condensed at the heat exchanger, from the gas. According to the present invention, stabilization of a reconversion process and the quality of a UO2 powder can be improved by preparing solid UO2F2, which is an intermediate of the UO2 powder, through UF6 heel treatment, and the high cost of radioactive waste disposal is reduced by minimizing UF6 heel to be less than 0.5 kg.