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COMBUSTION TEST IN STUDY ON RADIOACTIVE ENVIRONMENT EVALUATION OF COAL |
LIU Qiang, ZHU Wei, TIAN Hui, JIN Hong-tao, MENG Yu-tuo |
Shenyang Center of Geological Survey, CGS, Shenyang 110034, China |
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Abstract Samples from 11 coal mines in Kangping, Shenbei, Dongliang, Liaoyang, Fuxin, Hunjiang, Shulan, Hailar, Hunchun, Liangshui and Qitaihe in Northeast China are collected for combustion test. Burn coal in a nearly-closed burner to prevent material loss caused by fly ash and then measure the 238U, 232Th, 226Ra and 40K activity of coal and corresponding ash. The analysis shows that in the theoretical combustion state, assuming no fly ash is produced, the product of natural radionuclide enrichment factor (f) and ash content ratio(Ad) is 1. According to the migration and enrichment rule of nuclide after combustion and the nuclide weights affecting the radiation level, the paper proposes the reference values of radioactive environment evaluation applied to coal, such as specific activity, absorbed dose rate, annual absorbed dose, and internal radiation index. Verified by 11 coal mines, the results can reflect the radiation level of coal ash with the ranking basically consistent with the actual measurement.
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Received: 25 January 2019
Published: 05 November 2019
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[1] |
曾兵,葛良全,刘合凡,等. 成都经济区天然放射性环境评价[J]. 物探与化探,2010,34(1):79-84.
|
[2] |
徐东辰,王卫平. 山东黄河口地区环境放射性辐射水平及评价[J]. 物探与化探,2000,24(3):178-183.
|
[3] |
史天骄,王希,焦纯. 区域天然放射性环境调查与评价方法的讨论[J]. 铀矿冶,2012,31(4):214-216.
|
[4] |
李晓艳,许零,李辉波. 煤矸石及其燃烧产物中天然放射性核素测定及组分分析[J]. 环境工程学报,2016,10(9):5133-5138.
|
[5] |
田义宗,赵锋,李钢. Beck公式在滨海新区辐射环境本底调查中的验证[J]. 中国辐射卫生,2011,20(3):336-337.
|
[6] |
贾晓辉,王国全,冯光文. 环境地表γ辐射剂量率理论建模初探[J]. 核电子学与探测技术,2012,32(1):78-82.
|
[7] |
代杰瑞,鲁峰,庞绪贵. 青岛市地表伽玛辐射特征及环境影响评价[J]. 世界地质,2012,31(4):831-840.
|
|
|
|