First steps in the multivariate analysis of Belgian radon data
| Autor: | De Heyn V, Cnelli G, Ciotoli G, Tondeur F, Dehandschutter B, Licour C, Gerady I |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | 2nd International Workshop on the European Atlas of Natural Radiation, pp. 56–57, Verbania, Italy, 6-9 November 2017 info:cnr-pdr/source/autori:De Heyn V; Cnelli G; Ciotoli G; Tondeur F; Dehandschutter B; Licour C; Gerady I/congresso_nome:2nd International Workshop on the European Atlas of Natural Radiation/congresso_luogo:Verbania, Italy/congresso_data:6-9 November 2017/anno:2017/pagina_da:56/pagina_a:57/intervallo_pagine:56–57 |
| Popis: | Data: About 30 year after the first radon actions in Belgium, several datasets are available which allow the study of the correlations between indoor radon data and various related quantities. Indoor radon: the database covers the Southern part of Belgium (Walloon region) with an average density of about 1 data/km2, whereas the Northern part (Flemish region), where no affected area is known, only has about 0.1 data/km2. Soil radon and permeability: Ardenne, a radon-affected area of ~4000 km2, was densely explored (> 1 data/km2, including thoron), but only small campaigns went in the whole country (~30000 km2, ~0.003 data/km2), one being planned in summer 2017. Airborne survey of K, Th, U: uncalibrated data are available on a 100m x 100m grid. Soil K, Th, U/Ra: 219 data for U, somewhat less for K and Th, used for the calibration of the airborne data. Terrestrial gamma doserate: 379 measurements; calculated values are also derived from the airborne data. Qualitative information: for each measurement, geological, lithological and pedological information is available. Analyzing the relations between all these factors could allow developing a model that would predict areas affected by 222Rn, even without any measurement in homes. Because of the strong difference between Ardenne and the whole country in the information available on soil Rn and permeability, Ardenne deserves a specific approach. It is unfortunately not possible to include anthropogenic factors influencing indoor radon, because the available information was never encoded in the computerized databases. Ardenne: Ardenne is globally a strongly radon-affected area. Despite its homogeneity for geology, lithology and soil type, an important variability is observed in the indoor radon risk (local GM from ~45 to ~450 Bq/m3) as well as in soil Rn (1 to 400 kBq/m3), soil permeability ( |
| Databáze: | OpenAIRE |
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