Measurements of tritium permeation through SiC/SiC composite manufactured by nano-powder infiltration and transient eutectoid process were carried out with the use of pure tritium and tritium diluted with hydrogen. Using pure tritium at a pressure of 0.6Pa on the front side of the composite, the steady-state tritium permeation flux was estimated to be 9.5 x 10−12mol/m2s. In experiments with tritium diluted with hydrogen, it was found that the steady-state permeation fluxes went down with a decrease of tritium fraction in tritium–hydrogen gas mixture,

although the partial pressure of tritium on the front side was fixed at 0.6Pa.

Tritium Permeation Behavior in SiC/SiC Composites. K.Isobe, T.Yamanishi, S.Konishi: Fusion Engineering and Design, 2010, 85[7-9], 1012-5