- Volume 43 Issue 1
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Standard Measurement Procedure for Soil Radon Exhalation Rate and Its Uncertainty
- Seo, Jihye (School of Achitectural, Civil, Environmental and Energy Engineering, Kyungpook National University) ;
- Nirwono, Muttaqin Margo (School of Achitectural, Civil, Environmental and Energy Engineering, Kyungpook National University) ;
- Park, Seong Jin (School of Achitectural, Civil, Environmental and Energy Engineering, Kyungpook National University) ;
- Lee, Sang Hoon (School of Achitectural, Civil, Environmental and Energy Engineering, Kyungpook National University)
- Received : 2018.02.17
- Accepted : 2018.03.22
- Published : 2018.03.31
Background: Radon contributing about 42% of annual average dose, mainly comes from soil. In this paper, standard measurement procedures for soil radon exhalation rate are suggested and their measurement uncertainties are analyzed. Materials and Methods: We used accumulation method for estimating surface exhalation rate. The closed-loop measurement system was made up with a RAD7 detector and a surface chamber. Radon activity concentrations in the system were observed as a function of time, with data collection of 5 and 15-minute and the measurement time of 4 hours. Linear and exponential fittings were used to obtain radon exhalation rates from observed data. Standard deviations of measurement uncertainties for two approaches were estimated using usual propagation rules. Results and Discussion: The exhalation rates (E) from linear approach, with 30 minutes measurement time were
- Baskaran M. Radon: a tracer for geological, geophysical and geochemical studies. 19th Ed. Newyork NY. Springer Publishing. 2016;229.
- Haque AK, Al-Affan IA. Main factors affecting the calculation of radiation dose to the lung from inhalation of radon daughters. Sci. Total Environ. 1988;74:279-289. https://doi.org/10.1016/0048-9697(88)90143-X
- Boyle P, Levin B. World Cancer report 2008. 1st Ed. Lyon, France. International Agency for Research on Cancer. 2008;512.
- Tan Y, Xiao D. Measurement of the radon exhalation rate from the medium surface by tracing the radon concentration. J. Radioanal. Nucl. Chem. 2013;295(3):2295-2299. https://doi.org/10.1007/s10967-012-2294-9
- International Commission on Radiation Units and Measurements. Measurement and Reporting of Radon Exposures. ICRU Report 88. J. ICRU. 2012;12(2):1-24. https://doi.org/10.1093/jicru/ndv003
- Sun K, Guo Q, Zhuo W. Feasibility for Mapping Radon Exhalation Rate from Soil in China. J. Nucl. Sci. Technol. 2004;41(1):86-90. https://doi.org/10.1080/18811248.2004.9715462
- Shahrokhi A, Burghele BD, Fabian F, Kovacs T. New study on the correlation between carbon dioxide concentration in the environment and radon monitor devices. J. Environ. Radioact. 2015;150:57-61. https://doi.org/10.1016/j.jenvrad.2015.07.028
- Nasab MM, Negarestani A. Processing the spike- like radon anomaly exhalation from the soil surface by electrical model. Appl. Radiat. Isot. 2017;125:4-8. https://doi.org/10.1016/j.apradiso.2017.03.022
- International Organization of Standardization. Measurement of radioactivity in the environment- Air: Radon-222 Part 7: Accumulation method for estimating surface exhalation rate. ISO 11665-7. 2012;1-22.
- Seo J. Measurement of radon exhalation rate and study on correlation between radon exhalation rate and other environmental radiation parameters of soil in Youngnam area. Kyungpook National University. Master's Thesis. 2017;17-23.
- Vanchhawng SL. Measurement of radon, thoron and their progeny concentrations in Mizoram with special reference to Aizawl, Champhai and Kolasib districts. Mizoram University. Doctoral Thesis. 2012;68.
- Tan Y, Xiao D. Measuring radon exhalation rate through three cycles. J. Instrum. 2012;7(8):T08004. https://doi.org/10.1088/1748-0221/7/08/T08004
- Reimer GM. Radon measurement uncertainty: comparison between passive short-term and active measurement. J. Radioanal. Nucl. Chem. 2008;277(1):249-251. https://doi.org/10.1007/s10967-008-0738-z
- Freiler A, Horvath A, Torok K, Foldes T. Origin of radon concentration of Csalóka Spring in the Sopron Mountains (West Hungary). J. Environ. Radioact. 2016;151:174-184. https://doi.org/10.1016/j.jenvrad.2015.10.004