Radon in Buildings: A Report on the Situation in France

Abstract

Radon is a radioactive gas of natural origin that tends to accumulate in buildings. Although the levels recorded can be reduced, this requires the co-operation of resi dents, and the French population has a very poor under standing of radon-induced risk. The justification for keep ing a close watch on indoor radon concentrations is the underlying risk of lung cancer as a consequence of expo sure to high levels. Two official statements dealing with radon risk management were issued in 1999 in France to define the thresholds that should not be exceeded. The results of measurement campaigns, the number of build ings where concentrations above these thresholds are likely to occur, the identification of high-radon potential areas and the actions taken locally together with the way that the risk from radon and remedial actions are per ceived are reviewed herein.