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Radiation Protection Dosimetry 56:77-80 (1994)
© 1994 Oxford University Press
Radon in Belgium: Mapping and Mitigation in the Affected Area of Visé
The massif of Visé is well known by geologists for its special geological features, in particular the great abundance (N>30) of important uranium anomalies. The measuring campaigns conducted over the past years in several hundreds of houses resulted in a detailed radon map with clear indication of risk areas. Based upon the available information some 160 houses (2% of the building stock) are expected to have real radon problems (>400 Bq.m-3). Up to now 24 of these problem houses have been localised. Three of the most contaminated houses (>3000 Bq.m-3 in the living areas) have been studied in detail for mitigation purposes. In two of them sub-floor ventilation has been installed. In this way the original high levels were reduced by more than a factor of ten.
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