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김병호,권상운,황성태,유재형,김응호,안병길,정지영 한국공업화학회 2000 응용화학 Vol.4 No.1
The technology on the transmutation of nuclear waste has been developed to reduce the long term risks during the storage of the spent nuclear fuels, which contain the long-lived radioactive nuclides. It was studied on the fluorination of zirconium to investigate the preparation of the fuel for transmutation reactor. Solid zirconium was reacted with diluted hydrogen fluoride gas to produce zirconium fluoride in the monel tubular reactor. Fractional conversion was increased with the increasing mole fraction of hydrogen fluoride and reaction temperature. It was found that zirconium should be fluorinated under the 600℃ to overcome the sublimation problem of the produced zirconium fluoride and the spent nuclear fuel should be decladded and chopped into small pieces to reduce the fluorination time. Among the various gas - solid reaction models, 3- dimensional diffusion-controlled model was most suitable for the reaction. It was calculated from the model that 11 hours are required to fluorinate the zirconium sphere of 1㎜ diameter.