Outdoor Concentrations of the Equilibrium-Equivalent Decay Products of 222Rn in the Netherlands and the Effect of Meteorological Variables

Airborne radioactivity monitors put up in a network as a warning system in case of nuclear accidents were used to gain insight in the temporal variations of 222Rn and its decay products. Average equilibrium equivalent decay product concentrations (EEDCs) over a period of five years for stations across the country range from 1 to 3 Bq.m-3. Hourly averaged concentrations show a diurnal variation at all stations. The amplitude of this variation is maximal in summer and minimal or non-existent in winter. Superimposed is a seasonal variation with a maximum in late autumn and a minimum in spring. Wi... Mehr ...