Speaker
Description
During tests of JRODOS, simulations of radionuclide transport in aquatic environments were performed using the Hydrological Dispersion Module (HDM). JRODOS incorporates several hydrological models, including MOIRA, POSEIDON, and others. These models can utilize atmospheric release simulation results to calculate the behavior and fate of deposited radionuclides in rivers, lakes, reservoirs, and oceans. Water bodies are represented as boxes and catchments, each characterized by specific parameters. Detailed information about bathymetry and related data is essential for simulating radionuclide transport in these environments. Additionally, the HDM can be employed to propose medium- and long-term countermeasures.
In this study, the POSEIDON model was applied. POSEIDON is a dynamic marine box model that simulates the migration of radionuclides from sediments to marine organisms. It describes the marine environment as a system of compartments, including the water column, bottom sediments, and biota. Atmospheric releases were assumed as the initial phase, modeled using the Emergency Model Chain and the Atmospheric Dispersion Module (ADM). The source term comprised cesium and strontium isotopes, and historical weather data from NOAA NOMADS was employed. The subsequent POSEIDON simulation utilized the data obtained from the ADM, with a one-year prognosis period. Concentrations of radionuclides in water and seafood were then assessed.
The poster is prepared based on the research project of the Ministry of the Interior of Czechia „Improvement and development of tools, capabilities and skills in order to ensure effective management of the response to a radiation accident in all phases, taking into account the requirements of the National Radiation Emergency Plan of the CR“ (ID:VC20232025007).
