ESTE CBRN software tool was developed to model radiological impacts of event in urban environment, from the definition of the meteorological conditions and the source term as input parameters up to the calculated air concentrations and doses received by impacted persons. The approaches and methodologies applied in the ESTE CBRN – wind flow field within the urban area is evaluated by simple steady-state variant of Reynolds-averaged Navier-Stokes (RANS) equations coupled with k-epsilon model, and consequently Eulerian model is applied to dispersion calculation.
Validation of ESTE CBRN was done within the project of Urban Dispersion International Evaluation Exercise (UDINEE), led by the EC-Joint Research Centre (DG-JRC). The project was aimed to evaluate atmospheric dispersion models mainly for application in case of emergency preparedness and response. The observation data of Joint Urban 2003 field experiment (performed in Oklahoma City, USA) were made available for the UDINEE project. The data corresponded to the set of experiments done as instantaneous puff releases of sulphur hexafluoride gas (SF6). The observation database consisted of meteorological data and tracer measurements.
Description of ESTE CBRN approach and results of comparisions within UDINEE project are available here.
Acknowledgements We gratefully acknowledge the European Commission Directorate General for Migration and Home Affairs (DG HOME) for their support to the Urban Dispersion International Evaluation Exercise (UDINEE) activity. We want to acknowledge the contribution of various groups to UDINEE. The following agencies have prepared the data sets used in this study: U.S Army Dugway Proving Group as manager of the JU2003 database; Data from tracer monitoring stations were provided by the National Oceanic and Atmospheric Administration (NOAA) Air Resources Laboratory Field Research Division; Data from meteorological monitoring stations were provided by Dugway Proving Ground. Joint Research Center Ispra/Institute for Environment and Sustainability provided its ENSEMBLE system for model output harmonization and analyses and evaluation.