Abstract
The feasibility of using palladium alloy membranes in a diffusion cascade in order to separate the H, D and T in the exhaust stream of a fusion reactor is discussed. Values of the permeation separation factor are estimated for Pd - 20% Ag from available data and corresponding estimates for the necessary number of stages and the total membrane area are given for the required isotopic purification. The results show the advantage of operating at low temperatures and pressures and show that the method is perfectly feasible. The use of Pd - 8% Y will probably further improve the performance.
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