Abstract
Some years ago, we started developing an enhanced soil transport model, where short life nuclide contributions were accurately accounted, Teodori (2017). The aim was to extend the code capabilities to handle incidental release of contaminant to soil, by evaluating exposure since the very beginning of the contamination event, before the radioactive decay chain equilibrium is reached. In this years those new capabilities have been widely extended: the leaching model has been reworked in a more physically based manner, by using a more sophisticated formulation for the transfer rate; the soil compartment number has been increased, by introducing an intermediate layer; bioturbation by animals now also affects downward transfer of materials, by modifying the leaching constant and by void collapse; plant transfer contributes to contaminant redistribution through all soil depth by plant recycle.
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