Scenarious for the intentional release of Cs-137 from stacks of cement production factory :event analysys using the HotSpot code.

Abstract: - There are several types of events that could result in dispersion of radioactive substances in the environment. These include both intentional and unintentional events. The extent of the contamination and impact on the environment and people depend greatly on the specific event and the radionuclide involved. In recent years, the concern for protection of urban populations against terrorist attacks involving radiological substances has attracted increasing attention. Models and computational codes have been developed and hypothetical scenarios have been formulated for establishing priority of countermeasures and protective actions; determining of generic operational guidelines; and assessment of risks for exposure population. The aim of the presents study is to illustrate the resultant effects of intentional release of Cs-137 from stacks of cement production industry. This is done through simulation of different scenarios using a computer code named HotSpot. The Total Effective Dose Equivalent (TEDE), which includes external and internal contributions for the whole absorbed dose, has been calculated for various atmospheric stability Pasquill categories [1]. The meteorological data on atmospheric stability conditions are setting as “mean wind speed” and the results have been analyzed and are presented here. The results indicate that atmospheric dispersion of a relatively small amount of Cs-137 has the potential to contaminate a relatively large area with the extent of contamination (area and activity) firstly dependent on Cs-137 particle size, the height of release, and local weather conditions.