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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Печать: 1093-3611
ISSN Онлайн: 1940-4360

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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v14.i1-2.60
pages 77-88


Imed Ghiloufi
Imam University
Jacques Amouroux
Laboratoire de Genie des Precedes Plasmas Universite P. et M. Curie, ENSCP 11 rue P. et M. Curie 75005 Paris France

Краткое описание

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.