Radionuclide emissions from a coal-fired power plant

被引:81
作者
Amin, Y. M. [1 ]
Khandaker, Mayeen Uddin [1 ]
Shyen, A. K. S. [1 ]
Mahat, R. H. [1 ]
Nor, R. M. [1 ]
Bradley, D. A. [1 ,2 ]
机构
[1] Univ Malaya, Dept Phys, Kuala Lumpur 50603, Malaysia
[2] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England
关键词
2420 MW Thermal power plant; Radioactivity; Slag and soil; Radium equivalent activities; External gamma-ray dose rate; Committed effective dose; NATURAL RADIONUCLIDES; COASTAL AREA; RADIOACTIVITY; RADIATION;
D O I
10.1016/j.apradiso.2013.06.014
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Current study concerns measurement of radioactivity levels in areas surrounding a 2420 MW thermal power plant fueled predominantly by bituminous coal. The concentrations of Ra-226, Th-232 and K-40 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 (Ra-eq) 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 mu Sv and 220 mu Sv, respectively. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:109 / 116
页数:8
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