Indoor Radon and Radon Emanation in the Herculane Spa (Cerna Valley) Area

Abstract

Recent investigations have shown a connection between high indoor levels of radon and lung cancer risk. The main source of the radon is the emanation from soil and ground water. A study has been carried out in the Herculane Spa region, where the highest level of radioactivity (226Ra and 222Rn) from geother mal waters in Romania has been measured. This paper presents data about the radon emanation rate and indoor radon concentrations measured in the area studied. Only 20% of the measurements of indoor radon concentrations were values above 200 Bq·m^-3 (average 98 Bq·m^-3) when the weather was warm but in the cold season 40% of the radon levels indoors (average 185 Bq·m^-3) exceeded this value. For radon emanation rates we generally found values in the range 13-70 mBq·m^-2·s^-1 although they were significantly higher in the vicinity of the geological faults found in the area.

Keywords

Radon Radioactivity Geothermal water Exhalation rate Indoor radon

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References

Hornug RW , Meinhardt TJ : Quantitative risk assessment of lung cancer in US uranium miners. Health Phys 1987;52:417-430.

ICRP: The health effects of inhaled radon and its progeny. Protection against radon-222 at home and at work. ICRP Publ 1994;65.

Morrison HJ , Serenciw RM , Mao Y. , Vigle DT : Cancer mortality among a group of fluorspar miners exposed to radon progeny . Am J Epidemiol 1988;128:1266-1275.

Sevc J. , Tomasek L. , Keenz E. , Placek V. : A survey of the Czechoslovak follow-up of lung cancer mortality in uranium miners. Health Phys 1993;64:355-369.

Jamet J. : Radon and lung cancer. J Natl Cancer Inst 1989;81:745-757.

Grafton HE , West DR : Elevated indoor radon levels and elevated incidence of lung cancer in Columbus and Franklin County, Ohio: Cause or Coincidence?; in Cross FT (ed): Indoor Radon and Lung Cancer Risk. Richland, Battelle Press, 1990.

Goble RL , Hattis D. , Socolow R. : Uncertainties in population risk estimates which arise from different conditions of exposure to indoor radon; in Cross FT (ed): Indoor Radon and Lung Cancer Risk. Richland , Battelle Press, 1990. 8 Hofmann W. , Katz R. , Zhang C. : Lung cancer incidence in a Chinese high background area. Sci Tot Environ 1985;45:527-534.

Schoenberg JB , Klotz JB , Wilcox B. : Radon and lung cancer in New Jersey women . Cancer Res 1990;1:6520-6524.

Eaton RS : A case-control study of lung cancer and domestic exposure to radon . Proceedings of the 5th Indoor Air Quality and Climate, Toronto 1980, vol 2, pp 369-375.

10.

Cliff KD , Green MB , Lomas PR : Domestic radon remedies. Radiat Protect Dosim 1992; 45:599-601.

11.

Naismith S. : Efficacy of radon remedial measures. Radiol Protect Bull NRPB 1994;152:10-13.

12.

Miles Jch : Mapping the proportion of the housing stock exceeding a radon reference level . Radiat Protect Dosim 1994;56:207-210.

13.

Reimer GM : Using soil gas radon and geology to estimate regional radon potential . Radiat Protect Dosim 1992;45:219-223.

14.

Stranden E. : Natural radionuclides in the atmosphere and terrestrial environments in the Nordic countries. Proceedings of IRPA Congress , Visby 1988, pp 3-8.

15.

Keller G. , Folkerts KH : A study of indoor radon. Proceedings IAQ , Stockholm 1984, pp 149-154.

16.

Szabo A. : Radioactive waters and gases in Romania. Cluj, Dacia, 1978.

17.

Visarion M. , Apostol A. , Stefanescu R. : Contribution to explanation of geothermal deposit from Herculane Spa. Studii Cercetari Geofiz 1974;12:135-144.

18.

Cosma C. : Contribution to the study of the radioactivity and the chemical composition of natural gases emanated from mineral and geothermal sources from Romania ; PhD thesis, Cluj-Napoca, 1986.

19.

Megumi K. , Mamiro T. : Measuring radon exhalation rate using charcoal detectors. J Geophys Res 1972;77:3052-3060.

20.

Gusev NG , Dmitriev PF : Kvantovoe izbucenie radioactinih nuclidov. Moskva , Atomizdat, 1977.

21.

Vanmarke H. , lanssen A. : Study of proprieties of electrochemically etched α-tracks in a polycarbonate foil. Int report 1984, Nucl Phys Lab Gent, pp 1-4.

22.

Mastan I. : Helium in geothermal water sources; thesis, Cluj-Napoca , 1987.

23.

Wilkening M. : Radon in the environment. Oxford, Elsevier, 1992.

24.

Cosma C. , Ristoiu D. , Cozar O. : Radon exhalation from ground in two radon areas from Romania. Proceedings of Indoor Air'93, 1993, vol 4, pp 505-510.

25.

Natural Radiation Maps of Western Europe. NRPB, Chilton, Didcot, 1993.

26.

Cosma C. , Ristoiu D. , Rambiou S. , Poffijn A. : Indoor radon levels in some regions of Romania. Proceedings of Indoor Air '96, July 1996, Nagoya 1:105-110.

Indoor Radon and Radon Emanation in the Herculane Spa (Cerna Valley) Area - Romania

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