Many toxic, flammable and explosive substances, agents and compounds are produced, treated, handled or stored in the Czech Republic. These substances are also transported in considerable amounts on routes, railways and by pipelines. In other words, considerable part of the infrastructure produces, stores and uses dangerous chemical substances and/or chemical preparations as initial products, semi-products or final products in its own technological processing. Total amounts of the above mentioned dangerous chemical substances and chemical preparations are broad, for instance such as: chlorine, ammonia, formaldehyde, fosgene, hydrogen cyanide, etc. Many toxic, flammable and explosive substances, agents and compounds are produced, treated, handled or stored in the Czech Republic. These substances are also transported in considerable amounts on routes, railways and by pipelines. In other words, considerable part of the infrastructure produces, stores and uses dangerous chemical substances and/or chemical preparations as initial products, semi-products or final products in its own technological processing. Total amounts of the above mentioned dangerous chemical substances and chemical preparations are broad, for instance such as: chlorine, ammonia, formaldehyde, fosgene, hydrogen cyanide, etc. Modelling consequences from accidental or even "terrorist" releases of these dangerous chemicals must be an important measure of prevention, but also essential measure of consequence management. At present new software product TEREX could be used for this modelling. TEREX is intended for modelling and evaluation of leakages of industrial toxic chemicals. TEREX is aimed mainly for flexible use by rescue and emergency units before and during the rescue operations. One model is prepared to evaluate dangerous toxic substances leakages from industry (range and shape of cloud).
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