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In a scale model room of 62 cm -u00d7 35 cm sfr0d7 35 cm made of a porous, radium, and thorium-rich lithoid ignimbrite from Vico volcano, we investigated the effect of air extraction versus air introduction at different flow rates on equilibrium 222 Rn activity levels. In both cases, air introduction was always more effective than air extraction to reduce indoor 222 Rn, and higher flow rates resulted in larger 222 Rn decreases. The diffusion of 222 Rn through the walls of the scale model room's scale model room was modelled with a modified version of Fick's second law, where a value of air flow velocity was introduced. These findings indicated that the combination of proper coatings on the inner walls of a house's interior walls and outdoor air introduction at acceptable rates are a good way to start radon mitigation efforts. ".
Source link: https://doi.org/10.5194/adgeo-57-81-2022
"The purpose of this study is to investigate the correlation between radon measurements and the daily seismic activity rate in order to develop a model that allows estimation of seismic activity rates using only radon measurements. " The Vrancea zone in Europe is Europe's most active seismic zone, and is located along the eastern edge of the strongly bent Carpathian arc. From the study's long-period perspective, an approximate linear correlation has been established between the radon series and the daily seismic activity rate, providing insight into the seismic behavior in the study area with only the radon data. The results obtained for this area show that the radon time series analysis will be a helpful adjunct to operational earthquake forecasting's traditional seismic analysis.
Source link: https://doi.org/10.3390/s22114160
"Objectives" in areas with elevated radon levels in the Republic of Kazakhstan. The aim of this survey was to present the baseline findings of a pilot project to determine lung cancer screening using low-dose chest computed tomography in areas with elevated radon levels. According to the American College of Radiology Lung Imaging Reporting and Data System, all lung nodules were classified. Overall, 614 participants had positive baseline CT findings, according to the study. Seventy-four cancers were reported, resulting in an overall cancer detection rate of 2. 0 percent, with 10. 8% stage I and a predominance of stage III. In smokers and former smokers, compared to never-smokers, there were higher odds ratios of lung cancer detection. Conclusions The introduction of low-dose CT screening for lung cancer in regions with elevated radon levels is a cost-effective strategy for both smokers and never-smokers.
Source link: https://doi.org/10.3961/jpmph.21.600
"The radon concentration was determined for a month by 11 buildings in Al-Qadisiyah University's College of Education, using CR-39 reagent embedded inside the sponge by two detectors for each building. " In the CH1 model, the Department of Chemistry's building, the highest value of radon concentration was found, but the lowest value was recorded in the Li1 model, which is the college library building with a concentration rate equal to. ".
Source link: https://doi.org/10.46488/NEPT.2022.v21i02.026
"The accumulation of the radioactive gas radon in closed environments, such as dwellings, is the result of a complex system of reactions related to the appearance of several sources. " In order to preliminarily test the model's ability to simulate indoor radon concentrations in closed environments, three experimental studies were conducted. An application on a new experimental site was launched in order to determine the model's adaptability to various house typologies and environmental contexts in this paper. Activity measurements were conducted with a portable radon detector and results, revealing yet again good results of the device.
Source link: https://doi.org/10.3390/ijerph19106056
"In the years 2012-2013, experiments on underground coal gasification were carried out in a coal mine, which caused, among other things, damage to the rock mass. " Following that, periodic rises in the amount of potential alpha energy in the air had been discovered, which could pose a danger to miners. From 3. 0 up to 38 Bq/u22121 for radon exhalation rates, it was discovered that the measured values of radon and thoron exhalation rates varied from 3. 0 up to 38 Bq/u22121 for thoron, and from 500 up to 2000 BQu22121 for thoron exhalation rates.
Source link: https://doi.org/10.3390/ijerph19106038
"An international comparison of continuous monitors measuring radon activity concentration was carried out to determine the traceability of the European radon calibration facilities. " The experiment was carried out by comparing the secondary requirements used by these previous facilities, ranging from 100 Bq to 300 Billion u22123 u22123. Secondary standards were individually compared to a secondary reference device that was previously calibrated in a reference radon atmosphere traceable to a primary target.
Source link: https://doi.org/10.3390/ijerph19105810
"This paper discusses radon detectors in which activated carbon fabric is woven with a solid state nuclear track detector and embedded in a compensation module. " The variation of the detector response over the range of 5 to 30 percent in the module is 230 u2013305%. The module also shields the sensor from humidity and thoron, reducing the sensor's sensitivity to radon 7u20139 times higher than that of commonly used radon detectors. ".
Source link: https://doi.org/10.1038/s41598-022-12502-z
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