Design and calculation of tritium extraction from liquid LiPb by bubble columns for ITER(In Chinese)

A mathematical model describing the complex fluid-dynamics of a bubble extractor from liquid LiPb loop for ITER is presented.A parametric analysis of the extraction efficiency of a bubble column as a function of the process parameters is carried out and the design of a bubble extractor system is proposed.On this base,a mathematical model is built by taking into consideration the kinetics of deuterium desorption from liquid LiPb alloy.The calculation data of deuterium release-behavior from liquid LiPb under different operating conditions of temperature and deuterium partial pressures and helium gas flow-rates in the liquid LiPb alloy are obtained.These results have shown that the overall release process is governed by the diffusion of deuterium atoms in the LiPb and by the heterogeneous reaction at the gas-eutectic interface of the deuterium atoms recombination under the probable working temperature range.

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