A STUDY OF FACTORS AFFECTING INDOOR RADON PROPERTIES

The factors affecting indoor radon properties in Hong Kong have been s tudied, including the radon concentration, the total potential alpha e nergy concentration of radon progeny, the equilibrium factor, and the fraction of unattached radon progeny. These factors fall into three ca tegories, namely, (1) the building characteristics, including cooling method, age of the buildings, wall coverings and floor coverings; (2) the location of sites, including nearby environments, geological mater ials of the area, and the elevation of the sites; and (3) the meteorol ogical parameters, including rainfall, relative humidity, pressure, te mperature, and wind speeds. For category (1), only the ventilation is found to affect the indoor radon properties. For category (2), only th e nearby environments have effects. For category (3), the rainfall and temperature are found to have significant effects.