| Wu Yunyun,Sun Hao,Liu Dan,et al.Levels and distribution of indoor radon concentrations in Shenzhen, China[J].Chinese Journal of Radiological Medicine and Protection,2016,36(7):513-516 |
| Levels and distribution of indoor radon concentrations in Shenzhen, China |
| Received:February 17, 2016 |
| DOI：10.3760/cma.j.issn.0254-5098.2016.07.008 |
| KeyWords:Shenzhen Indoor air Radon concentration Building material |
| FundProject:国家自然科学基金（11375164） |
| Author Name | Affiliation | E-mail | | Wu Yunyun | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Sun Hao | Shenzhen Institute of Building Research, Shenzhen 518049, China | | | Liu Dan | Shenzhen Institute of Building Research, Shenzhen 518049, China | | | Shang Bing | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Cui Hongxing | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | hxcuicn@163.com |
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| Abstract:: |
| Objective To investigate the levels and distribution of radon in dwellings in Shenzhen cities of China. Methods A total of 108 low-, multi-, middle- and high-rise buildings were selected. Indoor radon concentrations were measured by using solid track detector. Results The arithmetic mean of indoor radon concentrations in Shenzhen was 64 Bq/m3, and geometric mean was 58 Bq/m3, in range of 15 to 155 Bq/m3. The average indoor radon concentration in Bao'an district was 50 Bq/m3 with the lowest value, and that in Pingshan new district was 87 Bq/m3 with the highest value. There were 12 measuring points where indoor radon concentrations were higher than 100 Bq/m3 in Shenzhen, accounting for 11.1% of the total number. Shapiro-Wilk test showed that the frequency distribution of indoor radon concentration in Shenzhen follows lognormal distribution (P > 0.05). The indoor radon concentrations showed a downward trend from 1990 to 2015. The indoor radon concentration decreases with the elevated floors except 10th and above floors. Conclusions The indoor radon concentrations in Shenzhen increased by 35%, compared to the previous investigations. It is recommended that efforts continue to improve radioactive materials standards about building material and to enhance the natural ventilation in high-rise buildings in order to lower the radiation hazards from radon. |
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