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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Natural radioactivity of ash and coal in major thermal power plants of West Bengal, India.
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Natural radioactivity of ash and coal in major thermal power plants of West Bengal, India.

机译：印度西孟加拉邦主要火力发电厂的灰分和煤的自然放射性。

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摘要

The natural radioactivity due to the presence of 238U, 232Th and 40K in ash and coal in major thermal power plants of West Bengal, India, namely Kolaghat, Durgapur and Bandel, was measured by a NaI (Tl)-based gamma ray spectrometer. The respective average activity concentrations of the radioelements 238U, 232Th and 40K in the ashes of Kolaghat were found to be 111, 140 and 351 Bq/kg, at Durgapur 97, 107 and 315 Bq/kg, and at Bandel 106, 126 and 321 Bq/kg. The absorbed gamma doses in air due to naturally occurring radionuclides in the ash from the power plants varied from 123 to 150 nGy h-1, which are three times higher than the world average of approximately 43 nGy h-1. The ash from power plants contains 2-3 times more natural radionuclides than that in feed coal. Ash samples have radium equivalent activity (Raeq) and external hazard index (Hex) values closest to 370 Bq/kg and unity respectively, which have implications in terms of radiation hazard arising due to the use of these ash samples in building and construction..
机译：通过基于NaI（Tl）的伽马射线能谱仪测量了印度西孟加拉邦主要热电厂（即Kolaghat，Durgapur和Bandel）中的煤灰和煤中存在238U，232Th和40K的自然放射性。发现Kolaghat骨灰中放射性元素238U，232Th和40K的平均平均活动浓度分别为111、140和351 Bq / kg，杜尔加布尔97、107和315 Bq / kg以及Bandel 106、126和321桶/千克由于来自电厂的烟灰中自然存在的放射性核素，空气中吸收的伽马剂量在123至150 nGy h-1之间变化，是世界平均水平约43 nGy h-1的三倍。发电厂的灰烬中所含天然放射性核素比进料煤中的天然核素高出2-3倍。灰烬样品的镭当量活度（Raeq）和外部危害指数（Hex）值分别最接近370 Bq / kg和1，这对在建筑和建筑中使用这些灰烬样品引起的辐射危害具有影响。

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