The national radon survey in ireland

This paper presents the results of the National Survey of Radon in Dwellings carried out by theRadiological Protection Institute of Ireland (RPII). Radon measurements were carried out in 11,319houses throughout the country. Indoor annual average radon concentrations ranged from 10 Bq/m3 to1924 Bq/m3. The measurement data were grouped on the basis of the 10 km grid squares of the IrishNational Grid System and used to predict the percentage of dwellings in each grid square which exceedsthe Reference Level of 200 Bq/m3. Grid squares across the country in which this prediction exceeds 10%are designated High Radon Areas.