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1
Content available The indoor radon survey in Serbian schools: can it reflect also the general population exposure?
Žunić Z. S., Bossew P., Veselinović N., Bochicchio F., Carelli V., Vaupotič J., Čuknić O., Simović R., Vojinović Z., Kisić D, Tollefsen T.
Nukleonika
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2010
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Vol. 55, No. 4
419-427
EN
A systematic indoor radon survey in elementary schools of Serbia is underway since 2008. Its current first phase covers all elementary schools in predominantly rural communities of Southern Serbia. The design of the survey, its implementation and the current state of its realization is shortly described. Part of this paper is devoted to discussion of the question if this survey could produce results representative also of the radon concentration in dwellings and of radon exposure of the general population, discussing some statistical aspects of representativity which arose during the work, namely, if the implementation leads to an unbiased estimate of the targeted quantities.
2
Content available Slovenian approach in managing exposure to radon at workplaces
Vaupotič J.
Nukleonika
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2010
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Vol. 55, No. 4
565-571
EN
Radon was surveyed in all the kindergartens and schools, major hospitals, water plants, wineries, spas, in a number of other public buildings, and karst caves with emphasis on the Postojna Cave (Slovenia). In addition to radon, also the concentration of radon short-lived decay products, equilibrium factor between radon and decay products, and unattached fraction of decay products have been monitored. Effective doses were calculated and used as a criterion to require remediation.
3
Content available Radon in outdoor air in the Mt. Etna area, Italy
Vaupotič J., Žvab P., Giammanco S.
Nukleonika
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2010
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Vol. 55, No. 4
573-577
EN
Radon (222Rn) activity concentration in outdoor air was measured, using AlphaGuard radon monitors, at 25 points in the Mt. Etna area, at different distances and in different directions from the summit. Values of up to 93 Bqźm–3 were found at three points close to the summit, at altitudes of about 3000 m above the sea level, and in the range of 3.0–19.6 Bqźm–3 elsewhere. An average radon concentration of 7.9 Bqźm–3 was obtained in the northern region, 4.8 Bqźm–3 in the eastern (oriented towards the sea), 9.6 Bqźm–3 in the western (the furthest inland), and 6.5 Bqźm–3 in the southern.
4
Content available Identification of radon anomalies in soil gas using decision trees and neural networks
Zmazek B., Džeroski S., Torkar D., Vaupotič J., Kobal I.
Nukleonika
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2010
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Vol. 55, No. 4
501-505
EN
The time series of radon (222Rn) concentration in soil gas at a fault, together with the environmental parameters, have been analysed applying two machine learning techniques: (i) decision trees and (ii) neural networks, with the aim at identifying radon anomalies caused by seismic events and not simply ascribed to the effect of the environmental parameters. By applying neural networks, 10 radon anomalies were observed for 12 earthquakes, while with decision trees, the anomaly was found for every earthquake, but, undesirably, some anomalies appeared also during periods without earthquakes.
5
Content available Background outdoor radon levels in Slovenia
Vaupotič J., Kobal I., Križman M. J.
Nukleonika
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2010
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Vol. 55, No. 4
579-582
EN
Radon (222Rn) activity concentration in outdoor air was measured by exposing track etch detectors at 60 points. Values were found in the range of 3.7–41.0 Bqźm–3, with a geometric mean (GM) of 11.8 Bqźm–3 and geometric standard deviation (GSD) of 2.2. An outdoor radon map of Slovenia was drawn, showing the majority of elevated values to be in the south-west part of the country that is covered by carbonates.
6
Content available A radon anomaly in soil gas at Cazzaso,NE Italy, as a precursor of an ML = 5.1 earthquake
Vaupotič J., Riggio A., Santulin M., Zmazek B., Kobal I.
Nukleonika
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2010
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Vol. 55, No. 4
507-511
EN
At Cazzaso (Friuli) in northeast Italy, radon (222Rn) activity concentration in soil gas in a borehole at a depth of 80 cm has been monitored continuously (at a frequency of once an hour) since May 2004, using a Barasol probe (Algade, France). In addition, environmental parameters (air and soil temperature, barometric pressure) have been recorded. The results have been evaluated and the relationship between radon levels and seismic activity is discussed. Correlation between radon concentration and barometric pressure has been observed. Preliminary results have shown a distinct radon anomaly prior to some earthquakes.
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