Indoor radon activity concentrations and effective dose rates at houses in the Afyonkarahisar province of Turkey (original) (raw)
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Indoor Radon Measurement in Dwellings of Khorramabad City, Iran
Iranian Journal of Medical Physics, 2018
Introduction: Exposure to indoor radon increases the risk of lung cancer. This study examined the level of indoor radon in dwellings of Khorramabad city, by using passive alpha-track detector (CR-39) during winter of 2016. Materials and Methods: In the present study, we detected the concentration of indoor radon in 56 dwellings. A passive sampling instrument (alpha-track detector with CR-39 polycarbonate films) was utilized to measure indoor radon gas concentration. The distribution map of indoor radon concentration was prepared using Arc GIS software.  Results: Radon concentration in the dwellings varied from 1.08 to 196.78 Bq/m3, with a mean value of 43.43±40.37 Bq/m3. The average annual effective dose received by the residents of the studied area was estimated to be 1.09 mSv. Our results showed a significant difference between the average radon concentrations in houses and apartments, with a higher level in houses. Conclusion: Indoor radon concentration in 10.1 of the dwellings...
Asian Journal of Chemistry, 2017
Measurements of indoor radon have a critical role in monitoring human health and safety. In this study, measurements of radon in the houses of Bingöl and Mus provinces and in their surrounding villages were performed by using CR-39 nuclear track detectors. Bingöl and Mus Provinces of Turkey have the severe terrestrial climate with hot and dry summers and cold and snowy winters for a long period. Therefore, people who spend much of their time at home have a greater risk for being exposed. The CR-39 detectors were placed in the selected 77 dwellings of Bingöl in the 2013 winter season and in 91 dwellings of Mus in 2012 winter season. Before the setup of detector, we had filled up a detailed questionnaire form to survey construction parameters and properties of the houses and living conditions of inhabitants. Detectors collected two month later were read and treated by Radosys Electronic equipment in Turkish Atomic Energy Agency Laboratory. The indoor radon concentrations in Bingöl and Mus provinces are found to vary from 43 to 348 Bq/m 3 with an average of 103 Bq/m 3 and from 25 to 604 Bq/m 3 an average of 108 Bq/m 3 , respectively.
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The indoor radon concentration in Adana, Turkey was measured in living rooms of 52 houses during winter 2005 and 57 houses during summer 2005. Forty-four houses were selected for both winter and summer researches for estimating seasonal variations. Indoor radon concentrations were measured seasonally over hotter and colder 2 months over the whole year, using CR-39 passive nuclear track radon detectors. The radon concentrations were ranged from 15 to 97 Bq m 23 on January-February 2005 for 60 d and from 5 to 70 Bq m 23 on June-July 2005 for 60 d. The average summer concentration measured was 25.8 Bq m 23 and the average winter concentration was 48.9 Bq m 23 in 44 houses that observed seasonal variations. The differences between winter and summer periods were ranged from 1 to 77 Bq m 23 . The average value in both winter and summer periods is 37 Bq m 23 in 44 houses that observed seasonal variations. This value is below the worldwide indoor radon concentration distribution of 46 Bq m 23 . The annual effective dose equivalent from 222 Rn was 0.9 mSv y 21 .
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Pilot survey of indoor radon in the dwellings of Bulgaria
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The first systematic indoor radon survey in four districts of Bulgaria was performed. Three hundred and seventy-three selected ground floor dwellings were measured using the nuclear track detectors during 6 months, from October 2011 to May 2012. It was found that indoor radon concentration varied between 20 and 3560 Bq m 23 with median value of 90 Bq m 23 . The fractions of dwellings in four districts: Sofia city, Sofia districts, Plovdiv and Varna above the reference levels of 300 Bq m 23 were 3, 9, 14 and 5 %, respectively. Each data set does not follow a log-normal distribution at a significance level of 95 %. The results of the analysis of the variance showed statistically significant differences among the indoor radon concentrations for the regions between urban and rural municipalities as well for the building with and without basement. These results may be utilised to set up the methodology for a more systematic survey in Bulgaria.
Advances in Applied Science Research, 2015
Indoor radon studies have been carried out in some dwellings of Jazan province, Saudi Arabia using CR-39 plastic track detectors. The study has been undertaken for the purpose of health risk assessments. The CR-39 detectors were placed in the bedrooms, guest rooms and living rooms, and exposed for one year. The annual average indoor radon concentration in dwellings varies from 18.2±5.5 to 41.4±10.4 Bqm −3 with a mean value of 31±6.6 Bqm-3 , which is well within the recommended action level. The seasonal variations of indoor radon reveal the maximum values in winter and minimum in summer. Mean concentrations amount to 27.4, 35.7 and 31.7 Bqm-3 in the living rooms, guest rooms and bedrooms, respectively. The lowest radon concentration (22.7±4.9 Bq m-3) was found in Jizan, whereas the highest was found in Samtah (35.7±8.2 Bq m-3). The annual estimated effective dose received by the residents of the studied area was found to vary from 0.47 ± 0.05 to 1.06 ± 0.14 mSv y −1 with the mean value of 0.80±0.08 mSv y −1. The lifetime fatality risk is found to vary from 0.29 to 0.65%. The results have been compared with the results reported in other areas of the same country and in others countries. All the values of radon concentration, effective dose and fatality risk in all dwellings under test were found to be quite lower than the permissible value recommended by UNSCEAR and ICRP.