The paper provides details on the re-engineering of the European decision support system for nuclear emergencies RODOS. Being a Java based product, the new RODOS version named JRodos introduces a cross-platform solution capable to run on most operation systems, including Windows and the main UNIX derivates. The re-engineered system preserves computational models from RODOS v6.0, adding a powerful GIS support and applying modern database technologies with flexible configuration possibilities. JRodos import functionality includes the support of EURODEP measurement files and GRIB 1 meteo data. The system operates successfully on Windows (NT based versions from Windows 2000 to Windows 7) and UNIX machines (OpenSuSe, Ubuntu, Solaris), both 86 and 64. Any RODOS further development will be realized in the JRodos version aiming to have this as the main operational version for the next 10 years.
Abstract.One of the major objectives of the 6 th Framework EC RTD EURANOS (European Approach to Nuclear and Radiological Emergency Management and Rehabilitation Strategies) project was to improve the RODOS (Real-time on-line decision support) system in its operational applicability. In the first phase of the project two possibilities for the main system development has been discussed: either to carry out refinements in the current version of RODOS or to consider a complete software re-engineering. The RODOS Users Group (RUG) finally concluded that the latter option was one to be realised. As a result a JAVA based version named JRODOS has been developed introducing a cross-platform solution capable to run on most operation systems, including Windows, Macintosh and the main UNIX derivates. The reengineered system preserves computational models from RODOS, adding a powerful GIS support and applying modern database technologies with flexible configuration possibilities. Furthermore, these new GIS functionalities allowed implementing advanced simulation models for simulating countermeasures in inhabited areas (ERMIN -European Model for Inhabited Areas) and food production systems (AGRICPAgricultural Countermeasure Program). Both simulation models have been part of the EURANOS project and represent state of the art modelling capabilities in their respective area.
-The radionuclide transport model THREETOX was extended to include the multi-fractional sediments and two-step kinetics. The model was implemented into the decision support system JRODOS where forecasts of marine currents from the operational ocean models were used to predict dispersion of radionuclides. The results of simulation were compared with measurements for the Fukushima-Daiichi case study. The THREETOX model implemented into the JRODOS was applied to the stress test scenario for the ASCÓ nuclear power plant (Spain).
-Hydrological Dispersion Module (HDM) of JRODOS includes the chain of the models describing the washing out of the accidental deposition from the watersheds to rivernet and radionuclide transport in rivers and reservoirs. This modelling chain of HDM was renewed by the integration of two models. One-dimensional model RIVTOX_SV provides possibilities for the computing radionuclide transport in the branched river networks. Twodimensional model for shallow reservoirs and river floodplains COASTOX_UN used algorithms of the parallel computing on the unstructured mesh of the finite volume method. The renewed modelling chain was tested for the subwatersheds of the Danube river and the Dnieper river.
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