Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)

The present state of the radon risk mapping in the Czech Republic

 

Ivan Barnet, Jitka Mikšová, Josef Procházka, Robert Tomas, Jana Karenová, Vladimír Bláha, Jan Holák

Geoscience Research Reports 33, 2000 (GRR for 1999), pages 108–111

Full text (PDF, 0.57 MB)

 

Abstract

The radon risk mapping in 1999 comprised two main projects - radon risk maps on scales 1 : 500 000 and 1 : 50 000. The generalised radon risk map was built as a GIS project in ArcView with the possibility of downloading ArcExplorer viewer directly from the CD. The vector data are in ESRI format, the tabelar data are connected in the *.dbf format. Topographic raster data use the *..tiff format. Radon risk from bedrock is characterised by three basic categories (low, medium and high) and one transient category (typical for the radon risk from the category to medium in the inhomogeneous Quaternary sediments). The data backgroun is based on 7000 point data from radon database. The contours of geological units are filled after the prevailing radon risk in particular rock types. The Czech Geological Survey also uses the vectorized geological maps on a scale of 1 : 50 000, enabling to construct the more detailed radon risk maps. The principle of construction is partly similar to generalised radon risk map, but the raster topography for the whole state territory (214 map sheets 1 : 50 000) is much more detailed. Therefore the more precise determination of radon risk from bedrock in particular villages and towns is possible. These maps (the programme started in June 1999) will be used by the State Bureau of Nuclear Safety and municipal authorities for more precise distribution of the track-etch detectors within villages and cities.