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| Investigation on outdoor level of short-lived radon prongeny in Xinzhen area, Beijing |
| WANG Maozhi1, PAN Ziqiang2, LIU Senlin1, CHEN Ling1, LIU Yanyang3 |
1. China Institute of Atomic Energy, Beijing 102413 China;
2. Science and Technology Commission CNNC;
3. Northern Regional Office of Nuclear and Radiation Safety Inspection |
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Abstract Objective To investigate the levels and variation of outdoor concentrations of short-lived radon progeny in Xinzhen district, Beijing, and to estimate the annual effective dose of local public exposed to outdoor radon progeny.Methods The concentration of radon progeny was measured with the BWLM-PLUS-S developed by Traclab, Germany, the NR-200A developed by University of South China, and the RPMD-SF01 developed by Peking University.Results The equilibrium equivalent concentration of outdoor radon was averaged to be 9.1 Bq/m3 during the measuring period, with a range from 0.4 Bq/m3 to 27.4 Bq/m3. The annual effective dose of outdoor radon progeny to the local public was 149 μSv, including 9 μSv of additional dose in haze days.Conclusion The concentration of outdoor short-lived radon progeny influenced by meteorological conditions, tends to be higher in the morning than in the afternoon, and appears to be higher in winter than in summer. The outdoor concentration is relatively high in haze days, and the additional annual effective dose of outdoor progeny to the local public during haze days accounts for about 6% of the total effective dose.
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Received: 03 July 2018
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