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Boris Dehandschutter, Federal Agency for Nuclear Control (Belgium)
André Poffijn, Federal Agency for Nuclear Control (Belgium)
Giancarlo Ciotoli, Universita` di Roma ??La Sapienza,?? (Italy)
Jean Klerkx, International Bureau for Environmental Studies (Belgium)
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Radon risk mapping is usually based on either indoor radon data, soilgas radon data or other type of data (permeability, geology, gamma dose-rate,...). This contribution compares various types of data and investigates the possibility to combine them in one single 'geogenic radon-potential' database. Based on different parameters such as lithology, soil permeability and soilgas radon concentration, a specific potential indoor radon concentration value can be attributed to soil-gas measurement points, without taking into account building characteristics. Comparing this dataset to the indoor radon dataset investigates the possibility to combine both data sets to obtain a large database with a high density (on average 3 points per square kilometer). The "geogenic radon-potential" data-set as well as the combined data-set could provide information on the potential radon hazard in building extension zones, where indoor based maps lack information. It also copes with the clustered nature inherent to indoor radon data. The possibilities are tested in radon-prone area's of Belgium, where detailed data are available.
The detailed maps are intended to be used for focussed measurement campaigns and information campaigns for the inhabitants (to identify the high exposed houses), prevention campaigns for new buildings and planning of measurement campaigns for workplaces.
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