Review of hydrogen isotopes transport parameters and considerations to corresponding experiments

Abstract The hydrogen isotopes tritium and deuterium as fuel of future fusion power plants will be in contact with several plant components: Reduced Activation Ferritic Martensitic (RAFM) steel parts of the blanket and austenitic steels used for pipelines and process equipment. Temperatures range from ambient up to 550 °C. Since both steel kinds can store and transport hydrogen to a considerable extent, design and safety analyses depend on hydrogen transport parameters for these materials over the full operation temperature range. Therefore, a qualified data base will be necessary for the future work on DEMO. This contribution presents an overview of available transport parameters of different RAFM and austenitic steels, also regarding exothermic hydride generating alloy elements and pure elements. A pre-selection of materials for a planned permeation chamber is discussed on the base of these data.