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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/161572
Decreasing Kd uncertainties through the application of thermodynamic sorption models
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Radionuclide retardation processes during transport are expected to play an important role in the safety assessment of subsurface disposal facilities for radioactive waste. The linear distribution coefficient (Kd) is often used to represent radionuclide retention, because analytical solutions to the classic advection-diffusion-retardation equation under simple boundary conditions are readily obtainable, and because numerical implementation of this approach is relatively straightforward. For these reasons, the Kd approach lends itself to probabilistic calculations required by Performance Assessment (PA) calculations. However, it is widely recognised that Kd values derived from laboratory experiments generally have a narrow field of validity, and that the uncertainty of the Kd outside this field increases significantly. Mechanistic multicomponent geochemical simulators can be used to calculate Kd values under a wide range of conditions. This approach is powerful and flexible, but requires expert knowledge on the part of the user.
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DOMÈNECH ORTÍ, Cristina, GARCÍA, D. and PEKALA, M. Decreasing Kd uncertainties through the application of thermodynamic sorption models. Science of the Total Environment. 2015. Vol. 527-528, num. 297-305. ISSN 0048-9697. [consulted: 18 of June of 2026]. Available at: https://hdl.handle.net/2445/161572