Study on behavior of tritium in concrete wall

Mobility of Tritium in Engineered and Earth Materials at the NuMIFacility, Fermilab: Progress report for work performed between June 13and September 30, 2006

“…They obtained an isotope exchange capacity about 20% of the reported value in Numata et al (1990b). Furuichi et al (2006) noted that a smaller value may have been obtained because preferential paths for the vapor existed along the walls of the cement paste tube.…”

“…Several studies have examined tritiated water vapor interaction with concrete (Numata et al, 1990a(Numata et al, , 1990bFuruichi et al, 2006). Tritiated water vapor will exchange with water in the pores that directly contact the atmosphere, or condense in the pores if the concrete is not saturated with water.…”

“…They obtained apparent diffusion coefficients by fitting the experimental data with the theoretical solution (numerically solving the one-dimensional diffusion equation). Furuichi et al (2006) conducted experiments in a packed bed of cement particles to obtain the overall mass transfer coefficients representing adsorption of water vapor onto the concrete and the isotope exchange reaction. They obtained an isotope exchange capacity about 20% of the reported value in Numata et al (1990b).…”

Transfer of tritium in concrete coated with hydrophobic paints

“…T transfer in concrete has been correlated in terms of effective diffusivity [4][5][6][13][14][15][16][17][18]. However, there are fewer researches on behavior of T transfer in concrete coated with hydrophobic paints [11,12,19].…”

Effect of hydrophobic paints coating for tritium reduction in concrete materials

“…Basic tritium transport phenomena in concrete materials have been reported [1][2][3][4][5][6][7][8]. Diffusion of tritium in concrete, mortar and cement paste was investigated by a permeation method [3,8] and a soaking method [1,2,[4][5][6].…”