Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8208396 | Applied Radiation and Isotopes | 2018 | 25 Pages |
Abstract
This work presents two complementary approaches (for low and high desaturation) to study tritiated water (HTO) diffusion through unsaturated cement-based materials. The first approach was based on through-diffusion experiments where suction was controlled by osmosis. In the second approach, diffusion experiments were performed in humidity chambers controlled by under-saturated saline solutions. Results revealed a decrease of effective diffusion coefficient by a factor of 10 from 100% to 23% of saturation degree. Comparison with gaseous H2 suggests that HTO diffuses through unsaturated cement-based materials at rates 4 orders of magnitude lower.
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Authors
S. Savoye, A. Rajyaguru, N. Macé, S. Lefèvre, G. Spir, J.C. Robinet,