Study on Permeation Behavior of Gaseous Tritium through Concrete Walls

Тритий. Теория, Практика, Последствия.

“…В металлах тритий удерживается поглощением свободной воды в гидратированном поверхностном слое окисления, попаданием H в объёмный металл, а также в виде связанного с решеткой трития, образующегося при нейтронной активации [Nishikawa et al, 2006].…”

Evaluation of Detritiation Strategies for Mitigating Tritium Releases

“…Studies have been performed demonstrating the permeation rate of tritium through cell construction material. 6,7 It was reported that using a porous material will result in the permeation of tritium into the outside environment in a relatively short amount of time, without any sort of stripper system in place. 6 It was also noted that when using a stripper system, tritium that had permeated into the walls initially will be re-emitted from the walls back into the cell due to the change in concentration gradient for tritium movement into the material.…”

“…6,7 It was reported that using a porous material will result in the permeation of tritium into the outside environment in a relatively short amount of time, without any sort of stripper system in place. 6 It was also noted that when using a stripper system, tritium that had permeated into the walls initially will be re-emitted from the walls back into the cell due to the change in concentration gradient for tritium movement into the material. 8 This tritium desorption from the walls back into the cell will result in the observance of a plateau of detectable tritium in the cell atmosphere.…”

“…In an atmosphere containing moisture slightly below saturation, the permeation rate of tritium through a concrete wall may be hindered due to the narrowing of pores by adsorbed water on the concrete surface, 6 however, due to the pore sizes of the material and the overall adsorption levels, this hindrance may be minor, if not negligible.…”