Abstract
It is conceived that tritium can be extracted from breeding liquid metals by using vacuum permeator. The properties of hydrogen isotopes under various operating conditions in the permeation system are basic condition of the optimal design of Permeator Against Vacuum (PAV). The capabilities of two different numerical models that can be used for predicting the permeation process of hydrogen isotope controlled by solid state bonding and convective diffusion, are described in this work. One model is tritium transport numerical computation, normally can be achieved by using Matlab and it can reveal whether radial transport is limited by the LiPb eutectic or by the solid membrane. Another model is based on Computational Fluid Dynamics (CFD) by using COMSOL Multiphysics. The geometry is simplified as a permeator tube with an α-Fe membrane. The simulation results show that by decreasing the flow rate and the tube diameter, and increasing the tube length, the permeator extraction efficiency can be improved to the greatest extent. In addition, the differences between the two models show that the permeator’s efficiency can be influenced by the fluid field in the permeator tube.
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