Spatiotemporal variation of radon and carbon dioxide concentrations in an underground quarry: coupled processes of natural ventilation, barometric pumping and internal mixing

Journal of Environmental Radioactivity
Frédéric Perrier, Patrick Richon

Abstract

Radon-222 and carbon dioxide concentrations have been measured during several years at several points in the atmosphere of an underground limestone quarry located at a depth of 18 m in Vincennes, near Paris, France. Both concentrations showed a seasonal cycle. Radon concentration varied from 1200 to 2000 Bq m(-3) in summer to about 800-1400 Bq m(-3) in winter, indicating winter ventilation rates varying from 0.6 to 2.5 x 10(-6) s(-1). Carbon dioxide concentration varied from 0.9 to 1.0% in summer, to about 0.1-0.3% in winter. Radon concentration can be corrected for natural ventilation using temperature measurements. The obtained model also accounts for the measured seasonal variation of carbon dioxide. After correction, radon concentrations still exhibit significant temporal variation, mostly associated with the variation of atmospheric pressure, with coupling coefficients varying from -7 to -26 Bq m(-3) hPa(-1). This variation can be accounted for using a barometric pumping model, coupled with natural ventilation in winter, and including internal mixing as well. After correction, radon concentrations exhibit residual temporal variation, poorly correlated between different points, with standard deviations varying from 3 to 6%....Continue Reading

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Citations

Dec 5, 2012·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Leena KamraD D Khandelwal
Apr 8, 2014·Radiation Protection Dosimetry·I SmetanováJ Omelka
Feb 9, 2016·The Science of the Total Environment·Frédéric Perrier, Jean-Louis Le Mouël
Apr 13, 2011·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·V M ChoubeyLeena Kamra
Nov 26, 2010·Journal of Environmental Radioactivity·Patrick RichonSoma Nath Sapkota
May 29, 2012·Journal of Environmental Radioactivity·Frédéric Perrier, Frédéric Girault
Jul 24, 2012·Journal of Environmental Radioactivity·Frédéric Girault, Frédéric Perrier
Mar 21, 2015·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·P Kolarž, Z Ćurguz
Jul 17, 2012·The Science of the Total Environment·Frédéric Girault, Frédéric Perrier
May 14, 2016·Journal of Environmental Radioactivity·Frédéric PerrierLaurent Bollinger
Jan 20, 2020·International Journal of Biometeorology·Mirjana ĆujićSnežana Dragović
Jan 26, 2021·Journal of Environmental Radioactivity·Jonathan L BurnettJames H Ely
Feb 16, 2020·The Science of the Total Environment·François BourgesPaulo Rodrigues

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