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Harmonization of practices for atmospheric dispersion modelling within the framework of risk assessment

Abstract : Since many years, using tridimensional (3D) models is increasing in order to compute hazardous consequences of dangerous phenomena such as fire, explosion or atmospheric gas dispersion and then estimate safety distances. In the specific context of the French regulation and mainly for the land use planning in the neighbourhood of industrial facilities as depicted in the Technological risk prevention plan (PPRT), prediction of safety distances is a key issue. First computations that were achieved has highlighted discrepancies between atmospheric 3D models (CFD, mass consistent, ...) results but also with conventional approach as Gaussian or integral models. In order to prevent such discrepancies and to enlighten scientific reasons of those differences, a French working group was created in November 2009 on the demand of French Ministry of Ecology and Sustainable Development. To reach these objectives, several simulation benchmark tests were carried out. In a first part we present the benchmark tests as well as their interpretations and we describe efforts of harmonization on practice and input data. In a second part we focus on the scientific analysis to perform more homogeneous input data between the several kinds of 3D atmospheric dispersion models. Some of the best practices and requirements are presented and discussed in the last part.
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  • HAL Id : ineris-00973694, version 1
  • INERIS : EN-2013-107

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Jean-Marc Lacome, Benjamin Truchot. Harmonization of practices for atmospheric dispersion modelling within the framework of risk assessment. 15. International conference on harmonisation within atmospheric dispersion modelling for regulatory purposes (HARMO 15), May 2013, Madrid, Spain. pp.718-723. ⟨ineris-00973694⟩

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