Speaker
Description
In most cases, radon is measured at workplaces to comply with Directive 2013/59/EURATOM's requirements through integrative long-term measurement done by solid-state nuclear track detectors. While integrative measurements are quite simple and relatively cheap, time-resolved measurements provide valuable information on the measured quantity's temporal variability. When the long-term average does not accurately reflect the radon concentration or radon progeny concentration during the worker's stay in the workplace, time-resolved measurements should be used as an auxiliary measurement or the only measurement. A typical example of such a situation is the spa with thermal water rich in radon; radon concentration in the workplace is higher when using the water during working time. On the other hand, when forced ventilation is turned on during office block occupancy, radon concentration is usually substantially lower than during nights and weekends, which are counted in the average radon concentration.
If a particular workplace exceeds the reference level, it is necessary to optimize workers' exposure. If it is not possible to lower the radon concentration below the reference level, it is necessary to calculate the effective dose. Due to their conditions, some workplaces may require determination of the PAEC, or the concentration of the attached and unattached fractions of radon decay products. Given the already described variability of workplace conditions, there will likely be a shift towards continuous monitoring of decay products or the implementation of personal dosimetry.
The aim of the presentation is to show, using real examples, how much the measured data can influence the result of the exposure estimation.