Inhalation dose due to radon, thoron, and progenies in dwellings of a hill station



The general public spends a major portion of their time in an indoor environment and hence receives a considerable amount of radiation. Knowledge about indoor radiation is important in order to arrive at the actual effective dose received by residents. The indoor radon, thoron, and progeny concentrations observed in the present study were found to vary with seasons of a given year. The highest and lowest indoor average radon, thoron, and progeny levels were observed during winter and summer seasons, respectively. The concentrations of indoor radon, thoron, and progenies were found to vary with the type of houses. The highest 222Rn, 220Rn, and progeny concentrations were observed in mud houses and the lowest values were recorded in wooden houses. The indoor 222Rn concentration correlated well with concentration of its grandparent 238U in underlying soil with a correlation coefficient of 0.87. The correlation between indoor 220Rn and 232Th in the underlying soil was found to be 0.64. The estimated effective doses received by the general public in the present study due to indoor radon and thoron were 1.49 ± 0.49 and 1.30 ± 0.53 mSv/year, respectively. The annual effective doses due to radon and thoron progenies were estimated as 0.76 ± 0.27 and 0.47 ± 0.23 mSv/year, respectively. The contributions from 222Rn, 220Rn, and corresponding progenies to the annual effective doses received were 37, 32, 19, and 12%, respectively. The general public living in the study area receives an inhalation dose of 4.02 mSv/year due to indoor radon, thoron, and progenies, which were found to be less than the action limit of ICRP 2009.


LR-115 Effective dose Seasonal variation Radon Thoron 



The author is thankful to Mr. S. Santhanam, Radiation Safety section, Indira Gandhi Center, of the Atomic Research, Kalpakkam, and Dr. S. Selvasekarapandian, former Professor, Karunya University, Coimbatore, for their continued support and encouragement throughout this work. The cooperation and assistance provided by the administration, Dr. Kevin, English Language Department, and co-faculty members of GS department are gratefully acknowledged.


  1. Armencea, E. S., Armencea, A., Burghele, B., Cucos, A., Malos, C., & Dicu, T. (2013). Indoor radon measurements in Bacau country. Romanian Journal of Physics, 58, 189–195.Google Scholar
  2. Arunkumar, M., Gurugnanaran, B., & Venkataraman, A. T. (2013). Topographic data base for landslides assessment using GIS in between Mettupalayam—Undhagamandalam highways, South India. International Journal of Innovative technology and exploring engineering, 2(5), 302–306.Google Scholar
  3. Babai, K. S., Poongothai, S., & Lakshmi, K. S. (2012). Estimation of indoor radon levels and absorbed dose rates in air for Chennai city, Tamilnadu, India. Journal of Radioanalytical and Nuclear Chemistry, 293, 649–654.CrossRefGoogle Scholar
  4. Bayram, C., Cumhur, C., Nesli, A., Nilgiinn, C., & Mahunt, D. (2012). Measurements of indoor radon concentration levels in Kilis, Osmaniye and Antakya, Turkey during spring season. Journal of Radioanalytical and Nuclear Chemistry, 292, 1059–1063.CrossRefGoogle Scholar
  5. Chen, J., Schorth, E., Mac Kinlay, E., Fife, I., Sorimachi, A., & Tokonami, S. (2009). Simultaneous 222Rn and 220Rn measurements in Winnipeg, Canada. Radiation Protection Dosimetry, 134, 75–78.CrossRefGoogle Scholar
  6. Durani, S. A., & Ilic, R. (1997). Radon measurements by etched track detectors: application in radiation protection, earth science and the environment. Singapore: World Scientific ISBN: 9810226667.CrossRefGoogle Scholar
  7. Eappen, K. P., & Mayya, Y. S. (2004). Calibration factors for LR-115 (type-II) based radon thoron discriminating dosimeter. Radiations Measurements, 38, 5–17.CrossRefGoogle Scholar
  8. Etiope, G., & Martinelli, G. (2002). Migration of carrier and trace gases in the geosphere: an overview. Physics of the Earth and Planetary Interiors, 129, 185–204.CrossRefGoogle Scholar
  9. Giagias, V., Burghele, D., & Cosma, C. (2015). Seasonal variation of indoor radon in dwellings from Athens, Greece. Romanian Journal of Physics, 60(9–10), 1581–1588.Google Scholar
  10. Iacob, O., Grecea, C., Capitanu, O., Rascanu, V., Agheorghiesei, D., Botezatu, E., & Iovita, S. (2001). Population exposure to indoor radon and thoron progeny. Journal De Medicina Preventiva, 9, 5–12.Google Scholar
  11. ICRP-65. (1993). International commission on radiological protection, ICRP publication 65. Oxford: Pergamon press.Google Scholar
  12. ICRP, (2009). Adult reference computational phantoms. ICRP Publication 110. Ann. ICRP 39 (2).Google Scholar
  13. Kamal, R. M., Taher, M. S., Fathy, A. H., & Husse, M. B. (2004). Natural radionuclides and radiocaesium contained in wood. Radioisotopes, 53, 507–515.CrossRefGoogle Scholar
  14. Kavasi, N., Nemeth, C., Kovacs, T., Tokonami, S., Jobbagy, V., Varhegyi, A., Gorjanacz, Z., Vigh, T., & Somali, J. (2007). Radon and thoron parallel measurements in Hungary. Radiation Protection Dosimetry, 123, 250–253.CrossRefGoogle Scholar
  15. Pinel, J., Fearn, T., Darby, S. C., & Miles, J. H. C. (1995). Seasonal correction factors for indoor radon in the UK. Radiation Protection Dosimetry, 58(2), 127–132.Google Scholar
  16. Porstendorfer, J. (1994). Properties and behavior of radon and thoron and their decay products in the air. Journal of Aerosol Science, 25(2), 219–263.CrossRefGoogle Scholar
  17. Ramachandran, T. V., Eappan, K. P., Nair, R. N., Sheikh, A. N., Mayya, Y. S., & Puranik, V. D. (2003). Estimation of inhalation dose due to radon, thoron and their progeny in Indian dwellings. Radiation Protection Environment, 26(1–2), 139–141.Google Scholar
  18. Ramola, R. C., Kandari, M. S., Rawat, R. B. S., Ramachandran, T. V., & Choubey, V. M. (1998). A study of seasonal variation of radon levels in different types of houses. Journal of Environmental Radioactivity, 39(1), 1–7.CrossRefGoogle Scholar
  19. Saidou, Shinji, T., Miroslaw, J., Bineng, G. S., Abdourahimi, I., & Ndjana, N. J. E. (2015). Radon-thoron discriminative measurements in the high natural radiation areas of southern Cameroon. Journal of Environmental Radioactivity, 150, 242–246.CrossRefGoogle Scholar
  20. Singh, B. S., Singh, H. S., & Singh, B. A. (2003). A comparative study of indoor radon level measurements in the dwellings of Punjab and Himachal Pradesh, India. Radiation Measurement, 36, 457–460.CrossRefGoogle Scholar
  21. Sivakumar, R. (2014). An assessment of natural radioactivity levels and radiation hazards in the soil of Coonoor, South India. Environmental Earth Sciences, 72, 5063–5071.CrossRefGoogle Scholar
  22. Steinhausler, R. (1996). Environmental 220Rn: a review. Environment International, 22, 1111–1123.CrossRefGoogle Scholar
  23. Sugino, M., Tokonami, S., & Zhuo, W. (2005). Radon and thoron concentrations in offices and dwellings of the gamma prefecture, Japan. Journal of Radioanalytical and Nuclear Chemistry, 266, 205–209.CrossRefGoogle Scholar
  24. Sulaiman, I., & Omar, M. (2010). Environmental radon/thoron concentrations and radiation levels in Sarawak and Sabah. Journal of Nuclear and Related Technology, 7(1), 1–13.Google Scholar
  25. Tchorz, T. D. E., & Solecki, A. T. (2011). Seasonal variation of radon concentrations in atmospheric air in the Nowa Ruda area (Sudety Mountains) of southwest Poland. Geochemical Journal, 45, 455–461.CrossRefGoogle Scholar
  26. UNSCEAR. (2000). Report to the General Assembly: sources, effects and risks of ionizing radiation. New York: United Nations.Google Scholar
  27. UNSCEAR. (2008). United National Scientific Committee on the Effects of Atomic Radiation, Report to the General Assembly. New York: United Nations.Google Scholar
  28. Vaupotic, J., Celikovic, I., Smrekar, N., Zunic, Z. S., & Kobal, I. (2008). Concentration of 222Rn and 220Rn in indoor air. Acta Chimica Slovenica, 55, 160–165.Google Scholar
  29. Virk, H. S., & Sharma, N. (2000). Indoor 222Rn/220Rn survey report from Hamirpur and Uuna districts, Himachal Pradesh, India. Applied Radiation and Isotopes, 52, 137–141.CrossRefGoogle Scholar
  30. Wilkening, M. (1986). Seasonal variation of indoor 222Rn at a location in southwestern United States. Health Physics., 51, 427–436.CrossRefGoogle Scholar
  31. WHO. (2009). Handbook on indoor radon, a public health perspective. Geneva: World Health Organization.Google Scholar
  32. Yu, K. N., Yound, E. C. M., Stokes, M. J., Guan, Z. J., & Cho, K. W. (1997). A survey of radon and thoron progeny for dwellings in Hong Kong. Health Physics, 73, 371–373.CrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2017

Authors and Affiliations

  1. 1.Department of General StudiesJubail University College, Jubail Industrial CityJubailKingdom of Saudi Arabia

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