Amin Y M, Khandaker Mayeen Uddin, Shyen A K S, Mahat R H, Nor R M, Bradley D A
Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia.
Appl Radiat Isot. 2013 Oct;80:109-16. doi: 10.1016/j.apradiso.2013.06.014. Epub 2013 Jun 29.
Current study concerns measurement of radioactivity levels in areas surrounding a 2420 MW thermal power plant fueled predominantly by bituminous coal. The concentrations of (226)Ra, (232)Th and (40)K in onsite bottom-ash were found to be 139 Bq/kg, 108 Bq/kg and 291 Bq/kg, respectively, the levels for these radiolnuclides in soil decreasing with distance from the power plant. At the plant perimeter the respective radionuclide concentrations were 87 Bq/kg, 74 Bq/kg and 297 Bq/kg. In a nearby town, the corresponding concentrations were 104 Bq/kg, 52 Bq/kg and 358 Bq/kg, suggestive of use of TENORM affected soils. The mean radium equivalent activities (Raeq) in soil and ash sample in the town were 205 Bq/kg and 316 Bq/kg, respectively. The Kapar plant ash/slag appears to contain a higher level of TENORM than the world average. The degree of contamination is much higher inside the town where slag has been mixed with topsoil as landfill or as simple domestic waste. For the prevailing levels of exposure and a worst case senario, the predicted committed effective dose due to ingestion and inhalation for intake durations of 1- and 30 years would be 4.2 μSv and 220 μSv, respectively.
当前的研究关注的是一座以烟煤为主燃料的2420兆瓦火力发电厂周边地区的放射性水平测量。现场底灰中（226）镭、（232）钍和（40）钾的浓度分别为139贝克勒尔/千克、108贝克勒尔/千克和291贝克勒尔/千克，这些放射性核素在土壤中的含量随与发电厂距离的增加而降低。在电厂周边，相应放射性核素的浓度分别为87贝克勒尔/千克、74贝克勒尔/千克和297贝克勒尔/千克。在附近的一个城镇，相应的浓度分别为104贝克勒尔/千克、52贝克勒尔/千克和358贝克勒尔/千克，这表明使用了受天然放射性核素物质（TENORM）影响的土壤。该城镇土壤和灰样中的平均镭当量活度（Raeq）分别为205贝克勒尔/千克和316贝克勒尔/千克。卡帕尔电厂的灰渣似乎比世界平均水平含有更高的天然放射性核素物质含量。在城镇内部，由于炉渣与表土混合作为填埋物或简单的生活垃圾，污染程度要高得多。对于当前的暴露水平和最坏情况假设，摄入和吸入导致的1年和30年摄入持续时间的预测待积有效剂量分别为4.2微希沃特和220微希沃特。
