Abstract
REDUCTION OF the ventilation rate in houses in the interests of energy conservation can lead to a build-up of radon-222 in room air. This results in irradiation of the lungs by the radioactive daughters of radon. An electrostatic precipitator has been used to remove radon daughters from the atmosphere of a sealed room. It is shown that this can reduce the dose to the bronchial epithelium by an order of magnitude, and effectively counter the effects even of extremely low ventilation rates.
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