The aim of the Austrian Radon Project (ARP) is to investigate the Rn-2
22 concentration in 0.3-0.5% of all Austrian dwellings to identify are
as with elevated radon exposure. The survey is carried out using short
-term and long-term integrating radon detectors covering a population
of 2 800 000 persons so far. The homes were randomly selected from the
telephone directory. The radon concentration distribution showed a lo
g-normal shape. County-means between 60 and 330 Bq/m(3) were found. A
radon potential was introduced to deduce a geological risk from the da
ta taken under different circumstances in different types of houses. T
his radon potential was defined as the annual mean radon concentration
in a standard dwelling and is computed by normalizing the measured ra
don data to this standard dwelling. Copyright (C) 1996 Elsevier Scienc
e Ltd.