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ISSN Druckformat: 1093-3611
ISSN Online: 1940-4360
Indexed in
ELECTROLYSIS EFFECTS ON THE CESIUM VOLATILITY DURING THERMAL PLASMA VITRIFICATION OF RADIOACTIVE WASTES
ABSTRAKT
To simulate the Cesium volatility during the vitrification of radioactive wastes by thermal plasma a computer model is used. This model is based on the calculation of system composition using free enthalpy minimization, coupled with the mass transfer equation at the reactional interface. In this model, the electrolysis effects, which occur between the electrodes and the liquid bath, are introduced. This model enables the determination of the influence of various parameters (e.g., temperature, nature of the atmosphere of the furnace, the plasma current) on the Cesium volatility. The results obtained indicate that an increase in the bath temperature produces an increase in the Cesium volatility. It was also found that the oxygen content in the carrier gas improves the Cesium's containments in the matrix and that the increase of plasma current provokes a decrease in Cesium volatility. The simulation results are compared to the experimental measurements obtained by emission spectroscopy. The comparison revealed that the model compares well to the experimental results.
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