Mathematical Modeling for Atmospheric Dispersion of Radioactive Cloud Passing Over Jeddah

Atmospheric dispersion has been performed for a hypothetical accidental airborne radionuclide release from any nuclear installation such as power reactor, research reactor or any facility which uses radioisotopes as its tools. Estimate of release for various radionuclides are based on U.S Nuclear Regulatory Commission (NRC 1.183). The normalized concentration distribution (NCD) of pollutants is calculated as a function of downwind horizontal distance up to 10 km from the release point. These estimates have been performed for Jeddah city (Kingdom of Saudi Arabia) using Gaussian Plume Model (GPM). The calculations have been evaluated for the atmospheric thermal stability class , B , (moderately unstable), which is, meteorologically, and according to Pasquill classification, the dominant stability category for Jeddah city. The computer program Mathmatica is used for this purpose.