A fast and accurate radon measurement tool for remedial actions in buildings

Continuous monitoring of radon concentration is an effective and fast method for assessing radon sources in buildings. For this purpose, fast response and absence of residual contribution from previous measurements is of primary importance to cut intervention time and cost in a remedial action. An instrument is described based on a scintillation cell. The instrument has the ability to characterise both high and low activity environments in rapid sequence, even with a switch off/on operation in between, with almost no influence on the measure accuracy. A discussion of the computations and results from measurements is given. (author)