Tritium permeation through martensitic steel from Li17Pb83 in in-pile reactor experiments

The work was devoted to development of the experimental unit for measurement and comparison of tritium permeation rates through bare and protected martensitic steel tubes. Both out-of-pile deuterium gas driven experiments and in-pile tritium permeation experiments were performed. The permeation reduction factor was estimated to be not less than 50 in both series. A few in-pile experiments of 6 h of duration each were performed in a high flux reactor. No degradation of the protection layer was observed for this period.