Measurement of Indoor Radon Gas and Its Progeny in Lady Keane College, Shillong

B. Kharkamni¹ and D.D. Wahlang^1,

¹Department of Physics, Lady Keane College, Shillong, Meghalaya, India, 793001

Cite this paper:
B. Kharkamni and D.D. Wahlang. Measurement of Indoor Radon Gas and Its Progeny in Lady Keane College, Shillong. Applied Ecology and Environmental Sciences. 2021; 9(6):580-584. doi: 10.12691/aees-9-6-1

Abstract

Measurement of indoor radon gas and its progeny was carried out in the rooms and laboratories of Lady Keane College, Shillong, using LR-115 films, Type II, which is a Solid State Nuclear Track Detector (SSNTD). The radon concentration in the different rooms varies from 27.88 Bqm^-3 to 61.01 Bqm^-3, with an average of 42.02 Bqm^-3. The results obtained were well within the prescribed safety limit of 100 Bqm^-3 as laid down by the World Health Organization. The average indoor radon concentration was slightly higher than the world average of 40 Bqm^-3. The Potential Alpha Energy Concentration (PAEC) recorded a maximum of 6.60 mWL and a minimum of 3.01 mWL, with the average being 4.54 mWL. The Annual Effective Dose Equivalent (AEDE) ranges from 0.16 mSv/y to 0.35 mSv/y, which was also well within the prescribed limit of 3mSv/y - 10 mSv/y. The average of the Annual Effective Dose Equivalent was 0.24 mSv/y which was also below the world average of 1.15 mSv/y.

Keywords:
radon progeny indoor LR-115 films dose

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References:

[1]	Pubchem website: https://pubchem.ncbi.nlm.nih.gov/.
[2]	International Agency for Research on Cancer website: http://www.iarc.fr/.
[3]	International Agency for Research on Cancer. Man-made mineral fibres and radon. IARC Monographs on the evaluation of carcinogenic risks to humans, Vol. 43 (1998), IARC, Lyon.
[4]	Environmental Protective Agency (EPA), USA website: http://www.epa.gov/.
[5]	United States Environmental Protection Agency. Radon report: USEPA Publication 402-R-03-003, (2003). (http://www.epa.gov/radon).
[6]	WHO handbook on indoor radon: A public health perspective, (2009).
[7]	Madureira, J., Paciência, I., Rufo, J., Moreira, A., de Oliveira Fernandes, E., & Pereira, A. Radon in indoor air of primary schools: determinant factors, their variability and effective dose. Environmental Geochemistry and Health, 38(2), 523-533, June (2015).
[8]	Lee, E. R., Chang, B. U., & Kim, Y. J. Radon Survey in School and Estimation of Effective Dose Using Corrected Radon Concentration. Radiation Protection Dosimetry, Vol. 179, No. 2, pp. 101-107 (2018).
[9]	Jónsson, G., Halldórsson, Ó., Theodórsson, P., Magnússon, S.M., Karlsson, R.K. (2016) Indoor and outdoor radon levels in Iceland. https://gr.is/wp-content/uploads/2016/09/Indoor-and-outdoor-radon-levels-inIceland_NSFS_Final_FINAL_version.pdf. Accessed Date: 28 May 2021.
[10]	Kojo, K., & Kurttio, P. Indoor Radon Measurements in Finnish Daycare Centers and Schools — Enforcement of the Radiation Act. International Journal of Environmental Researchand Public Health, 17, 2877, (2020).
[11]	Naeem, H. S. Radon concentration indoor levels in building of college of basic education – Al Muthanna University, International Journal of Advanced Research, Volume 4, Issue 4, 1213-1218 (2016).
[12]	Salim, A., Ebrahiem, S. A., & Ahmed, S. Measurement of Radon concentration in College of Education, Ibn Al- Haitham buildings using Rad-7 and CR-39 Detector, ScienceDirect, Energy Procedia 157, 918-925 (2019).
[13]	Kulalı, F., Günay, O., & Aközcan, S. Determination of indoor radon levels at campuses of Üsküdar and Okan Universities. International Journal of Environmental Science and Technology, April 2019.
[14]	M. R. Usikalu, C. A. Onumejor, J. A. Achuka, A. Akinpelu, M. Omeje & T. A. Adagunodo. Monitoring of radon concentration for different building types in Covenant University, Nigeria, Cogent Engineering, 7:1, 1759396, (2020).
[15]	Shergill, S.; Forsman-Phillips, L.; Nicol, A.-M. Radon in Schools: A Review of Radon Testing Efforts in Canadian Schools. International Journal of. Environmental Research and Public Health, 18, 5469 (2021).
[16]	Gordon, K., Terry, P., Liu, X., Harris, T., Vowell, D., Yard, B., & Chen, J. Radon in Schools: A Brief Review of State Laws and Regulations in the United States. International Journal of Environmental Research and Public Health, 15(10), 2149(2018).
[17]	Pyngrope, A, Khardewsaw, A., Jami, N., Talang, T., Maibam, D., Sharma, Y., Walia, D., & Saxena, A. Measurement of Indoor Radon Activity Levels in Jowai Region, Meghalaya, India. Journal of Applied and Fundamental Sciences, 5, 29-33. June 2019.
[18]	ICRP (International Commission on Radiological Protection). Protection against radon 222 at home and at work. ICRP Publication 65. Ann. ICRP 23(2), 1-45(1993).
[19]	Nidal Dwaikat, Ghassan Safarini, Mousa El-hasan, Toshiyuki Iida, CR-39 detector compared with Kodalpha film type (LR115) in terms of radon concentration. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 574, Issue 2, Pages 289-291, 2007. ISSN 0168-9002.
[20]	Salama, T. A., Seddik, U., Hegazy, T. M., & Morsy, A. A, Direct determination of bulk etching rate for LR-115-II solid-state nuclear track detectors, PramanaJ. Phys., Vol. 67, No. 3, pp. 529-534, September 2006.
[21]	United Nations Scientific Committee on the Effects of Atomic Radiation (2000). Sources and Effects of Ionizing Radiation. UNSCEAR 2000 Report to the General Assembly, with Scientific Annexes. UNSCEAR, United Nations, New York.
[22]	K.P. Eappen, Y.S. Mayya, Calibration factors for LR-115 (type-II) based radon thoron discriminating dosimeter, Radiation Measurements, Volume 38, Issue 1, Pages 5-17, 2004.