No abstract

-The integration of the lake and river MOIRA models into the JRODOS Hydrological Dispersion Module (HDM) modelling framework, that originally only predicted short-term radionuclide dispersion in river systems, was a key objective of the PREPARE project. Thanks to it, the capabilities of JRODOS-HDM have been increased with regard to modelling the long-term fate of radionuclides ( 137 Cs and 90 Sr) in freshwater systems and to predicting the radiation doses via aquatic exposure pathways, as well as the efficiency of countermeasures to improve the radiological impact. Validated models have been implemented and exhaustive verification tests have been performed for both lake and river scenarios.

-The Hydrological Dispersion Module of JRODOS was implemented for the predictions of the long term dynamics of radiocesium in the rivers and ponds of the Fukushima Prefecture and for the forecasting of radiocesium dynamics in the reservoirs under the influences of the extreme flush floods generated by the typhoons. The possibilities of HDM for the assessment of the efficiency of the potential remediation measures for the diminishing water contamination were tested for several water systems.