TRITIUM ADSORPTION AND DIFFUSION OF 25-PERCENT SILVER PALLADIUM CATHODIC MEMBRANES FOR WATER PROCESSING

A study was carried out to ascertain the diffusion and adsorption para meter values for tritiated water in contact with palladium-silver cath odic membranes with and without palladium black deposits. It is shown that the amount of diffused and trapped tritium, the retrodiffusion, d iffusion coefficient, tritium concentrations in the alloy sublayer; an d diffusion layer thickness depend on the applied cathodic potential, temperature, palladium-silver membrane thickness, palladium black depo sits on the cathodic surface, and time. With a palladium black deposit on the palladium-silver; the tritium adsorption and diffusion increas e. Parameter values including the activation energy are determined fro m electrochemical impedance spectroscopy voltammetry: permeation exper iments, and chronocoulometry.