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Natural Radioactivity and Risk Assessment in Soil Samples of Tuzkhormato District Salahd in Governorate-Iraq |
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PP: 109-114 |
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Author(s) |
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Nada F. Tawfiq,
Asmaa Ahmad Aziz,
Lukman A. Hussein,
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Abstract |
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| The specific activities of naturally occurring radioactive material (NORM) includes 238U, 232Th and 40K in soil samples collected across the District Tuzkhormato of Salahdin Governorate-Iraq at 2016, have been measured by gamma spectroscopy using NaI(Tl) detector. The specific activity of 226Ra in the soil ranged from 20.8Bq/kg to 353.9Bq/kg with mean 151.94Bq/kg, 214pb ranged from 34Bq/kq to 99.3Bq/kg with mean 70.25Bq/kg and 214Bi ranged from 4Bq/kg to 114.6Bq/kg with mean 42.37 Bq/kg. The specific activities of 238U ranged from 32.63 to 127.36 with mean 88.26 Bq/kg, 228Ac ranged from MDL to 170.6Bq/kg with mean 85.56Bq/kg and 40K ranged from 60.9Bq/kg to 1202.1Bq/kg with mean 395.7Bq/kg. The average value of specific activities of present study, for 238U, 232Th and 40K are higher than the world average value of 35Bq/kg, 30Bq/kg and 400Bq/kg respectively. Radium equivalent, absorbed gamma dose rate, annual effective dose equivalent, the external hazard index, internal hazard index andthe representative level index were calculated and comparable with other global radioactivity measurements and found to be safe for public and environment. |
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