The Verification of the Correctness of Data Entering into the System that Simulates Consequences of Radiation Accident with an Outflow to the Environment

The Verification of the Correctness of Data Entering into the System that Simulates Consequences of Radiation Accident with an Outflow to the Environment The thesis is aimed to verify the correctness of the data entering the system that is able to simulated consequences following radiation accident with a release of radiation into the atmosphere. The object of testing the correctness were the data used in the program RTARC, which has been used in the nuclear power plant Temelin, for the case all security barriers fail and radioactive substances get into the environment. This program works with real orographic data that were obtained from existing maps. The aim of this work was to carry out complete analysis of current orographic system that has been used by the program RTARC; to get through alternative methods supplementary or more specific orographic data; to verify the correctness of the orographic data that enter system RTARC; to analyze consequences of possible abnormalities. To verify the correctness of entry data, we used the program Google Earth. The object of my investigation was to examine altitude data within the net with zones, found in sectors determining possible directions of radionuclide spreading through the atmosphere into the environment surrounding the nuclear power plant Temelin. We found that there were differences between altitude data in some zones. To assess the consequences of these found differences, we tested influence of the terrain on the development of the atmospheric turbulent diffusion. The goal of this test was to find out if the program RTARC which uses Gaussian dispersion model is accurate. We found that the program RTARC is applicable for the area ETE and the differences in original data and new data concerning the altitudes are negligible from this point of view. The Thesis will be used as a background for updating orographic data used in RTARC program