Transfer of tritium in concrete coated with hydrophobic paints

Effect of hydrophobic paints coating for tritium reduction in concrete materials

“…These results mean that the rate-determining step is diffusion in the epoxy paint films. In the cement paste with silicon coating, the data plots are not fitted by the diffusion model but fitted by the sorption model as well as our previous works of high HTO concentration [9,10]. The value of k HTO = 0.03 m 3 /g day is obtained.…”

“…The weight and thickness of cement paste pellets after curing are around 10.6 g and 7.5 mm on the average. In this experiment, the cement paste pellets are prepared as representative of concrete materials because aggregates in concrete and mortar hardly have a capacity to trap tritium in them according to previous reports [2,9,10]. Various thicknesses of the paints are dried off in the molds as well as the cement paste pellets.…”