RADON MEASUREMENT IN CONSTRUCTION MATERIALS FROM THE NORTHEASTERN REGION OF THAILAND
DOI:
https://doi.org/10.55766/sujst-2023-03-e02052Keywords:
Annual effective dose, Construction materials, Radon, Thailand provincesAbstract
Indoor radon concentration plays a vital role in the total annual effective dose due to internal radiation exposure. This research investigated the radon gas found in concrete, which consists of rocks, sand, and cement. It can be found in most houses and buildings in Thailand to evaluate the possible residents’ health hazards. Radon was measured using an ionization chamber detector (ATMOS 12 DPX), and the values of the radon concentration, radon exhalation rate, and annual effective dose were calculated. This study collected concrete samples from Loei, Khon Kaen, Nong Bua Lam Phu, Bueng Kan, Nakhon Phanom, Mukdahan, Ubon Ratchathani, and Nakhon Ratchasima provinces in the northeastern region of Thailand. The radon concentration in the concrete samples varied from 22.00 ± 4.00 to 110.00 ± 8.00 Bq⸱m-3, with an average of 56.77 ± 5.77 Bq⸱m-3. These values were below the guideline level of 148 Bq⸱m-3, recommended by the US Environmental Protection Agency (US EPA). The radon exhalation rate varies from 4.20 ± 0.84 to 55.07 ± 4.00 Bq⸱kg-1⸱h-1, with an average of 15.47 ± 1.68 mBq⸱kg-1⸱h-1. The annual effective dose ranges from 0.57 ± 0.10 to 2.89 ± 0.21 mSv⸱y-1, with an average of 1.47 ± 0.15 mSv⸱y-1. The International Commission recommends the dose limit of 1 mSv⸱y-1 for public exposure on Radiological Protection (ICRP).
References
Aksoy, A., Al-Jarallah, M.N., and Al-Haddad, M.N. (2002). Natural radioactivity in the scale of water well pipes. Journal of Environmental Radioactivity, 61(1):33-40. https://doi.org/10.1016/S0265-931X(01)00112-6
Cothern, C.R., and Smith, J.E. (1987). Environmental Radon. Springer. New York, 218p. https://doi.org/10.1007/978-1-4899-0473-7
Grace, W.W., Gao-Tang, Y.H., Tam, C.M., and Gao, X.F. (2008). Anti-radon coating for mitigating indoor radon concentration. Atmospheric Environment, 42(37):8,634-8,639. https://doi.org/10.1016/j.atmosenv.2008.08.009
Hajo, Z., and Ferid, S. (2009). WHO handbook on indoor radon-a public health perspective. WHO, France, 95p.
Joseph, G.A., Taeko, M., Theodore A.M., James. H.S., John, F. M, and David, L.M. (2010). Assessing exposure to granite countertops part 2-Radon. J. Expo Sci Environ Epidemiol, 20(43):263-272. https://doi.org/10.1038/jes.2009.43
Konstantin, K. (2006). Radon exhalation of hardening concrete: monitoring cement hydration and prediction of radon concentration in construction site. Journal of Environmental Radioactivity, 86(3):354-366. https://doi.org/10.1016/j.jenvrad.2005.10.005
Kovler, K., Perevalov, A., Steiner, V., and Metzger, L.A. (2005). Radon exhalation of cementitious materials made with coal fly ash: Part 1 – scientific background and testing of the cement and fly ash emanation. Journal of Environmental Radioactivity, 82(3):321-334. https://doi.org/10.1016/j.jenvrad.2005.02.004
Naomi, H., Harley, F.T., Cross, B.D., Stuart, V.E., Archer, D.A.M., and John, H.H. (1984). Evaluation of Occupational and Environmental Exposures to Radon and Radon Decay products in the United States. NRPC, USA, 203p.
Righi, S., and Bruzzi, L. (2006). Natural radioactivity and radon exhalation in building materials used in Italian dwellings. Journal of Environmental Radioactivity, 88(2):158-170. https://doi.org/10.1016/j.jenvrad.2006.01.009
Smith, H. (1991). Recommendation or the international commission on radiological protection. ICRP publication, New York, 422p.
United Nations. (2000). United Nations Scientific Committee on the Effects of Atomic Radiation UNSCEAR 2000 Report to the General Assembly with Scientific Annexes. United Nations, New York, 659p.
UNSCEARS. (1988). Effects and Risks of Ionizing Radiation-Annex B: Exposures from nuclear power production. United Nations, New York, 647p.
US EPA. (1992). National emission standards for hazardous air pollutants, emission standards for radon emissions from phosphogypsum stacks (final rule) Federal Register (40CFR61). United States: U.S. Environmental Protection Agency. Available from: https: www.ecfr.gov. Accessed date: June 25, 2021
