Simulation of Accidental Release by Means of two Different Modeling Approaches

Abstract

For the Seveso Directive, the determination of damage areas related to accidental scenarios, is a key issue. In the present work, the results of two simulation models used (the Gaussian model, named EFFECTS, and Lagrangian, named ARRISK) to determine the effects of the local buildings on the simulated dispersion are presented and compared. The selected test site is a depot of hazardous materials. The results show that Gaussian model exhibits a maximum impact distance greater respect to the Lagrangian code. Significant differences between the two modeling approaches are observed for the IDLH index. As expected, the impact of buildings on the spatial extension of dangerous areas is also found to be noteworthy.