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The detection and measurement of radionuclides in feed coal, bottom ash and fly ash samples collected from Barapukuria 2×125 MW coal-fired thermal power plant in Dinajpur district of Bangladesh, have been performed by gamma ray spectrometry technique. The average activity concentrations of 226 Ra, 232 Th and 40 K in feed coal, bottom ash and fly ash samples were 10.46±5.24, 23.50±10.88 and 232.23±131.94 Bqkg -1 ; 56.91±2.77, 69.22±4.26 and 189.79±64.65 Bqkg -1 ; and 70.91±2.90, 115.26±5.79 and 205.53±65.56 Bqkg -1 ; respectively. These measured values were compared with other literature values. The calculated absorbed dose rates were found higher than the worldwide average values for both the bottom ash and fly ash samples. Moreover, the radium equivalent activity in all the samples was less than 370 Bqkg -1 and external hazard

Natural Radioactivity of Feed Coal and Its by-products in Barapukuria 2×125 MW Coal Fired Thermal Power Plant, Dinajpur, Bangladesh