Proceedings of the Korean Radioactive Waste Society Conference (한국방사성폐기물학회:학술대회논문집)
- 2019.05a
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- Pages.69-69
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- 2019
Effect of the Crucible Cover on the Distillation of Cadmium
- Kwon, S.W. (Korea Atomic Energy Research Institute) ;
- Jung, J.H. (Korea Atomic Energy Research Institute) ;
- Lee, S.J. (Korea Atomic Energy Research Institute)
- Published : 2019.05.09
Abstract
The distillation of liquid cathode is necessary to separate cadmium from the actinide elements in the pyroprocessing since the actinide deposits are dissolved or precipitated in a liquid cathode. It is very important to avoid a splattering of cadmium during evaporation due to the high vapor pressure. Several methods have been proposed to lower the splattering of cadmium during distillation. One of the important methods is an installation of crucible cover on the distillation crucible. A multi-layer porous round cover was proposed to avoid a cadmium splattering in our previous study. In this study, the effect of crucible cover on the cadmium distillation was examined to develop a splatter shield. Various surrogates were used for the actinides in the cadmium. The surrogates such as bismuth, zirconia, and tungsten don't evaporate at the operational temperature of the Cd distiller due to their low vapor pressures. The distillation experiments were carried out in a crucible equipped with cover and in a crucible without cover. About 40 grams of Cd was distilled at a reduced pressure for two hours at various temperatures. The mixture of the cadmium and the surrogate was heated at
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