Liu Guoqing, Luo Qi, Ding Mingxia, Feng Jiangping
Institute of Applied Nuclear Technology, Shenzhen University, Nanhai Ave 3688, Shenzhen, Guangdong, 518060, People's Republic of China,
Environ Monit Assess. 2015 Jun;187(6):356. doi: 10.1007/s10661-015-4501-y. Epub 2015 May 15.
In this study, soil samples around Mawan coal-fired power plant (CFPP) in Shenzhen, a high background radiation area in South China, were analyzed for natural radionuclides. The activity concentration of (226)Ra, (232)Th, and (40)K in soils around Mawan CFPP ranged from approximately 72 to 358 Bq kg(-1) (averaged 204 Bq kg(-1)), 118 to 432 Bq kg(-1) (averaged 265 Bq kg(-1)), and 101 to 2168 Bq kg(-1) (averaged 1269 Bq kg(-1)), respectively, being found to be significantly higher than the world range values. The levels of these radionuclides in soil largely decreased with increasing distance from the CFPP, indicating a technologically enhanced natural radiation near the CFPP. The Raeq values for the soil samples around Mawan CFPP ranged from 346 to 878 Bq kg(-1), most of which exceeded the allowed maximum Raeq value of 370 Bq kg(-1). The operating of CFPP has increased the total radioactive dose received for the nearby population.
在本研究中，对中国南方高本底辐射区深圳妈湾燃煤发电厂（CFPP）周边的土壤样本进行了天然放射性核素分析。妈湾CFPP周边土壤中（226）镭、（232）钍和（40）钾的活度浓度范围分别约为72至358贝克勒尔每千克（平均204贝克勒尔每千克）、118至432贝克勒尔每千克（平均265贝克勒尔每千克）和101至2168贝克勒尔每千克（平均1269贝克勒尔每千克），结果发现显著高于世界范围值。土壤中这些放射性核素的水平在很大程度上随着与CFPP距离的增加而降低，表明CFPP附近存在技术增强型天然辐射。妈湾CFPP周边土壤样本的镭当量值范围为346至878贝克勒尔每千克，其中大部分超过了370贝克勒尔每千克的允许最大镭当量值。CFPP的运行增加了附近居民接受的总辐射剂量。
