Behavior of tritiated water on concrete materials

Kobayashi, Kazuhiro; Hayashi, Takumi; Yamanishi, Toshihiko

In a fusion reactor of high safety and acceptability, safety confinement of tritium is one of key issues for the fusion reactor. Tritium should be well-controlled and not excessively released to environment and to prevent workers from excess exposure. Especially, the hot cell and tritium facility of ITER will be used various construction materials such as the concrete and the organic materials. Since the organic and the concrete materials will be contaminated by tritium compared with the metal materials such as SS, it is very important to study the tritium behavior on the materials from viewpoint of protection the excess exposure to workers. Therefore, in order to understand for tritium behavior on the concrete materials, the sorption and desorption experiment was carried out as a function of the exposure time, temperature and tritiated water concentration. From the results, the behavior of tritium sorption and desorption in the concrete materials will be discussed.