Advances in Geosciences
Advances in Geosciences
ADGEO
Articles | Volume 67
Articles | Volume 67
https://doi.org/10.5194/adgeo-67-35-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/adgeo-67-35-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 67
30 Oct 2025
 | 30 Oct 2025

Effect of spatial variability on uranium diffusion in the three facies of the Opalinus Clay at Mont Terri

Marco De Lucia, Marco Fabbri, and Theresa Hennig

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Short summary
The effect of spatial variability on uranium diffusion in Opalinus Clay over a million years was assessed by 2D reactive transport simulations. Different rock types and porosity impacted results, with variability's influence growing with longer correlation lengths of geostatistical simulations (up to 12.9 %). This highlights that 1D models may underestimate uncertainty in long-term radionuclide transport at repository sites, and spatial variability must be considered.
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