燃煤电厂高温过程后的泊松分布
Po distribution after high temperature processes in coal-fired power plants.
作者信息
Chuangao Wang, Ruirui Liu, Jinfeng Li, Zhijun Huang, Jingshun Pan, Zhiping Luo, Ling Chen, Zhongwen Wang, Ziqiang Pan
机构信息
Department of Radiation Safety, China Institute of Atomic Energy, Fangshan District, Beijing, 102413, China.
Department of Radiation Safety, China Institute of Atomic Energy, Fangshan District, Beijing, 102413, China; Department of Nuclear Engineering and Radiation Health Physics, Oregon State University, 100 Radiation Center, Corvallis, OR 97331, USA.
出版信息
J Environ Radioact. 2017 May;171:132-137. doi: 10.1016/j.jenvrad.2017.02.015. Epub 2017 Feb 24.
In this paper, the distribution of Po after high temperature processes in six units of coal-fired power plants (CFPs) were evaluated. The coal, bottom ashes, fly ashes from electrostatic precipitators (ESP), and flue gases from stacks were sampled from four CFPs and analyzed for Po contents. The results showed that Po was mainly captured by the ESP, with little left in the bottom ash, and a small fraction of Po was directly discharged into the environment through the stacks, accounting for 0.06%-0.6%, which was consistent with the reported data. It was also found that part of the Po could not be accounted for in the mass balance analysis for the whole combustion process in CFPs, which was also in line with the reported data. The results obtained in this study provided essential basic data for environmental radiological risk analysis for CFPs.
本文评估了六家燃煤电厂（CFP）高温处理后钋（Po）的分布情况。从四家CFP采集了煤、底灰、静电除尘器（ESP）的飞灰以及烟囱排放的烟气样本，并分析了其中的钋含量。结果表明，钋主要被ESP捕获，底灰中残留较少，一小部分钋通过烟囱直接排放到环境中，占比0.06%-0.6%，这与已报道的数据一致。研究还发现，在CFP整个燃烧过程的质量平衡分析中，部分钋无法得到解释，这也与已报道的数据相符。本研究获得的结果为CFP的环境放射性风险分析提供了重要的基础数据。
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