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首页> 外文期刊>World Journal of Nuclear Science and Technology >Measurement of Natural Radioactivity and Radon Exhalation Rate in Coal Ash Samples from a Thermal Power Plant
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Measurement of Natural Radioactivity and Radon Exhalation Rate in Coal Ash Samples from a Thermal Power Plant

机译：火力发电厂煤灰样品中自然放射性和Rad析出率的测量

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Coal is the main energy source for electricity generation in the world. In Morocco, 37% of electricity generation comes from combustion coal in thermal power plants. This combustion process generates large amounts of fly and bottom ashes. In recent years, these ashes became a great topic of interest because of their different uses and especially in construction materials. In this work, we assess radiation risks due to natural radioactivity in samples of fly and bottom ashes collected from JLEC (Jorf Lasfar Energy Company) thermal power plant, and different analyses are performed through two nuclear techniques such as gamma spectrometry and alpha dosimetry based on the use of LR115 films detectors. Our analysis shows that 226Ra activities and 232Th in both ash samples are well above the permissible activity. The values of the external risk index (Hex) and internal one (Hin) for these ashes are below unity, with the exception of 1.28 in fly ash for Hin. The obtained values for the equivalent radium Raeq and annual effective doses ? in fly and bottom ashes are 324 Bq/kg and 210 Bq/kg, and 0.18 mSv/y and 0.11 mSv/y, respectively. The surface radon exhalation rates for the samples of fly and bottom ashes are 276 mBq?m-2?h-1 and 381 mBq?m-2?h-1, respectively. Based on these results, we have shown that fly ash and bottom one from thermal power plant JLEC didn’t have, in any case, a health risk to the public so it can be effectively used in various construction activities.
机译：煤炭是世界上发电的主要能源。在摩洛哥，37％的电力来自火力发电厂的燃烧煤。这种燃烧过程会产生大量的粉煤灰和底灰。近年来，由于这些灰烬的用途不同，尤其是在建筑材料中，这些灰烬成为人们关注的重要话题。在这项工作中，我们评估了从JLEC（约瑟夫·拉斯法尔能源公司）热电厂收集的粉煤灰和底灰样品中由于自然放射性引起的辐射风险，并通过两种核技术（例如基于γ谱法和α剂量法）进行了不同的分析使用LR115薄膜探测器。我们的分析表明，两个灰分样品中的226Ra活度和232Th都远高于允许的活度。这些骨灰的外部风险指数（Hex）和内部风险指数（Hin）的值均低于1，但Hin的飞灰含量为1.28。等效镭Raeq和年有效剂量的获得值？飞灰和底灰分别为324 Bq / kg和210 Bq / kg，以及0.18 mSv / y和0.11 mSv / y。粉煤灰和底灰样品的表面ra呼出率分别为276 mBq·m-2·h-1和381 mBq·m-2·h-1。根据这些结果，我们表明，火力发电厂JLEC的粉煤灰和底灰在任何情况下都没有对公众健康的危害，因此可以有效地用于各种建筑活动中。

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