Abstract
The objective of risk management is to prevent incidents due to the operation of facilities which handle hazardous materials. There is a wide range of available models for risk analysis which help to understand the risk of a hazardous facility. Among many of them, ALOHA (Areal Locations of Hazardous Atmospheres) computer programme, which uses site-specific information provided by its user and physical property data from its extensive chemical library, was used to predict atmospheric dispersion of a hazardous gas cloud after an accidental chemical release. The paper compares the predicted hazard zones as a function of wind speed following the accidental release scenario. The ALOHA atmospheric dispersion model was run in pharmaceutical industry for direct release of acetone under different weather conditions. The movement of pollutants is governed by motions in the atmosphere. Some of the transport phenomena determine the path that the airborne contamination will follow. By defining the width of vulnerable and dangerous zones, potentially vulnerable objects can be identified and the response procedure to accidental situation can be defined.
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