Abstract
The investigation of life-time properties of Russian industrial Pd-membrane alloy V-1, as a material for a palladium diffuser of the ITER Fuel Clean-Up System, has been continued. The saturation experiment with duration up to 2004 h has been performed. The calculated helium-3 concentration in the samples was 466 appm. Investigation of the samples after exposure showed that mechanical properties were slightly changed. The lattice parameter was slowly decreased. Positron annihilation treatment showed that simple defect concentration was slowly decreased, and that the helium-3 bubble sizes and He-3 concentration were significantly increased during the exposure. Microstructures of the specimens showed a uniform distribution of helium-3 bubbles inside the grains.
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