Time variations of 222Rn concentration and air exchange rates in a Hungarian cave |
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| Authors: | Hedvig Éva Nagy Zsuzsanna Szabó Gyozo Jordán Ákos Horváth Attila Kiss |
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| Institution: | 1. Lithosphere Fluid Research Lab , E?tv?s University , Budapest , Hungary;2. Geological Institute of Hungary , Budapest , Hungary;3. Department of Atomic Physics , E?tv?s University , Budapest , Hungary;4. Danube-Ipoly National Park Directorate , Budapest , Hungary |
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| Abstract: | A long-term radon concentration monitoring was carried out in the Pál-völgy cave, Budapest, Hungary, for 1.5 years. Our major goal was to determine the time dependence of the radon concentration in the cave to characterise the air exchange and define the most important environmental parameters that influence the radon concentration inside the cave. The radon concentration in the cave air was measured continuously by an AlphaGuard radon monitor, and meteorological parameters outside the cave were collected simultaneously. The air's radon concentration in the cave varied between 104 and 7776 Bq m?3, the annual average value was 1884±85 Bq m?3. The summer to winter radon concentration ratio was as high as 21.8. The outside air temperature showed the strongest correlation with the radon concentration in the cave, the correlation coefficient (R) was 0.76. |
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| Keywords: | cave Hungary natural radioactivity radon-222 seasonal periodicity time dependence |
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