Natural radioactivity and radiological hazard assessment of coal samples collected from Kasimpur thermal power plant, Kasimpur (U.P.), India
by Anil Sharma; R.G. Sonkawade; Avinash C. Sharma
International Journal of Low Radiation (IJLR), Vol. 10, No. 2, 2015

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 H_ex and H_in 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.

Online publication date: Thu, 28-Jan-2016

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