Natural radioactivity and radiological hazard assessment of coal samples collected from Kasimpur thermal power plant, Kasimpur (U.P.), India

A. Sharma, R. Sonkawade, Avinash C. Sharma
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Abstract

Low-level gamma ray spectroscopy with a NaI (TI) gamma radiation detector was used for the measurement of activity concentrations of radionuclides 226Ra, 232Th and 40K. Activity concentrations of radium were found to vary from 12 to 39 Bq kg−1, thorium ranged from 15 to 49 Bq kg−1 whereas 40K ranged from 157 to 460 Bq kg−1. Radium equivalent activity has been found to vary from 50.8 to 118 Bq kg−1 and absorbed gamma dose rates varied from 24 to 53.2 nGy h−1 whereas corresponding outdoor annual effective dose found to vary from 0.029 to 0.065 mSv y−1. The calculated values of Hex and Hin range from 0.13 to 0.31 and 0.16 to 0.41 respectively whereas values of gamma and alpha index vary from 0.19 to 0.42 and 0.06 to 0.19 respectively. The values of hazard index are under the action limit.
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印度Kasimpur (upp) Kasimpur热电厂煤样的自然放射性和放射性危害评估
用低水平伽玛能谱仪和NaI (TI)伽玛射线探测器测量了放射性核素226Ra、232Th和40K的活度浓度。镭的活度浓度在12至39 Bq kg - 1之间变化,钍的活度浓度在15至49 Bq kg - 1之间变化,而40K的活度浓度在157至460 Bq kg - 1之间变化。已发现镭当量活度在50.8至118 Bq kg−1之间变化,吸收的伽马剂量率在24至53.2毫希·h−1之间变化,而相应的室外年有效剂量在0.029至0.065毫希·y−1之间变化。Hex和Hin的计算值分别为0.13 ~ 0.31和0.16 ~ 0.41,gamma和alpha指数的计算值分别为0.19 ~ 0.42和0.06 ~ 0.19。危害指数均在作用限值之内。
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International Journal of Low Radiation
International Journal of Low Radiation Environmental Science-Health, Toxicology and Mutagenesis
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期刊介绍: The IJLR is a peer-reviewed journal dedicated to the publication of research articles, review papers and technical notes in all domains related to low-dose radiation, among which are the biological and health effects in humans and the biota, in vitro and in vivo research on low radiation effects, regulatory and policy aspects, risk estimation and public perception.
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