The computer code Migration Analysis of Radionuclides in the Far Field (Painter and Mancillas, 2009) simulates radionuclide transport in a sparsely fractured geological medium. The numerical tool FASTREACT (FrAmework for STOchastic REActive Transport; Trinchero et al., 2013) relies on the theory of stochastic convective models (e.g. Shapiro and Cvetkovic 1988) and provides a tool for reactive transport simulations along a set of streamlines based on mechanistic geochemical processes. Given their similarity (both codes uses particle-based methods), their remarkable efficiency and their complementarity, the two tools have been integrated in an interface, denoted as iFM (interface FASTREACT-MARFA) whose aim is to increase the scientific soundness of the retention model used by MARFA by periodically updating the
The “background” geochemistry (excluding radionuclides) is calculated using a mechanistic reactive transport code (i.e. including explicitly each relevant geochemical reaction). The link between this mechanistic reactive transport simulation and the MARFA trajectory segments is provided by the FASTREACT approach. By performing a number of batch simulations over this pre-calculated geochemical background, a dataset of Kd values is generated, which is representative of the actual geochemical conditions throughout the model spatial and time domain. This information will then be fed to MARFA in order to calculate radionuclide transport and retardation based on these “intelligent” Kd values.
If you would like to reference Marfa in your publications, please use the following reference: Painter, S., V. Cvetkovic, and O. Pensado. "Time-domain random walk methods for simulating radionuclide transport in fractured porous rock." Proceedings of the 11th International High-level Radioactive Waste Management Conference (IHLRWM 2006). Las Vegas, Nevada. Vol. 30. 2006.
Painter, S., Cvetkovic, V., Mancillas, J., and Pensado, O. (2008). Time domain particle tracking methods for simulating transport with retention and first-order transformation. Water resources research, 44(1), W01406.
Painter, S., and Cvetkovic, V. (2005). Upscaling discrete fracture network simulations: An alternative to continuum transport models. Water resources research, 41(2), W02002.
If you would like to reference FastReact in your publications, please use the following reference: Trinchero, P., Molinero, J., Román-Ross, G. (2012) A streamline-based approach for the solution of multicomponent reactive transport problems, SKB report R-10-45.
Trinchero, P., Molinero, J., Román-Ross, G. (2014) FASTREACT -an efficient methodology for the solution of reactive transport problems, submitted to Applied Geochemistry.
These are the different partners support one or more iMaGe projects: