Tritium penetration through concrete material with waterproof coating

Edao, Yuki

Tritium penetration behavior in various hydrophobic paints coated on concrete walls was investigated in order to obtain fundamental data of contamination and decontamination of tritium. The amount of tritium penetration and release in epoxy resin which exposed in tritium atmosphere were measured. The amount of tritium penetration per weight of the epoxy films was constant regardless of their thicknesses and that of the films less than 0.5 mm of the thicknesses was saturated within a day. It was found that tritium penetration rates through epoxy films were fast and tritium was uniformly trapped in the films. Tritium penetration rates through epoxy films were faster than those of cement pastes coated with epoxy films. It was considered that the rate-controlling step of tritium transfer process through cement pastes coated with epoxy film was diffusion in the interface between cement paste and epoxy film.