Radiation Protection Dosimetry 56:15-18 (1994)
© 1994 Oxford University Press
Influence of Ventilation Rate on Indoor Radon Concentration in a Test Chamber
A methodological approach is proposed in order to identify the sources of indoor radon and the proper remedial actions to be undertaken in highly contaminated houses. The application of this methodology to a test chamber allows the evaluation of the following sources: building materials, outdoor air and underlying soil. Estimates are performed by both experimental techniques and mathematical modelling. Measurements carried out inside the test chamber indicate the dependence of radon concentration on ventilation and differential pressure between indoors and outdoors. The increase in ventilation induces the following effects on radon entry: an increase of entrance from outdoor air and a diminution of inflow from underlying crawlspace due to the rise of indoor pressure that inhibits the upward airflow from the crawlspace.