Effect of tritium and helium-3 on the lifetime properties of PdAg alloys in ITER tritium purification technology

Abstract An experimental verification for long-term performance of a Pd Ag permeation in ITER tritium fusion cleanup units (FCU) is needed. In addition, information is required on the influence of tritium and 3 He decay on the physical and chemical properties of Pd Ag alloys (V-1). The results of the investigations of alloys (V-1) (mechanical properties and microstructure) after long-term usage exposition in tritium are given in this report. The experimental conditions (temperature, pressure, clearance, 3 He concentrations) and the previous conclusions on the V-1 alloy performance are presented.