عنوان المقالة: Determination of Radionuclide’s Concentrations in Soil Around of Al-Tuwaitha Nuclear Research Center in Iraq by Using Gamma Spectroscopy Analysis System
Bashair M. Saied, Raad M. Al-Khafaji, Auday T. Al-Bayati
الملخص الانجليزي
The measurement of the radionuclide’s namely 238U, 232Th, 40K and 137Cs in soil samples collected from 17 surrounding regions of Al- Tuwaitha nuclear research center in Iraq, were carried out by Gamma- Spectroscopy analysis system. The range of concentrations of 238U, 232Th, 40K and 137Cs in the samples varies from (12.01 ± 3.47- 37.19 ± 6.10) Bq.kg−1, (14.05 ± 3.75-34.80 ± 5.90) Bq.kg−1, (285.30 ± 16.89- 490.95 ± 22.16) Bq.kg−1 and (2.92 ± 1.71-15.20 ± 3.90) Bq.kg−1 with overall mean values of 21.83 ± 4.64 Bq.kg−1, 25.29 ± 5.01 Bq.kg−1, 363.47 ± 19.02 Bq.kg−1 and 8.72 ± 2.92 Bq.kg−1, respectively.
The radium equivalent rate (Raeq) calculated with concentrations between (57.60 ± 7.59 - 109.09 ± 10.44) Bq. kg−1 with a mean value (85.97 ± 9.24) Bq. kg−1. The absorbed dose Rate (Dγ) of the 238U, 232Th and 40K radionuclide’s for the soil samples in the study area were from (27.70 - 51.67) nGy. h-1 with an average value of (40.51) nGy.h-1 and 137Cs from (0.5 - 2.58) nGy.h-1 with an average value of (1.48) nGy.h-1. The indoor annual effective dose rate (AEDE)in range (0.14 - 0.25) mSv. y-1 with an average value of (0.20) mSv. y-1. The outdoor annual effective dose rate (AEDE) out range (0.03 - 0.06) mSv. y-1 with an average value of 0.05 ms.y-1. The internal hazard index (Hin) range (0.19 - 0.4) with an average value of (0.29). The external hazard index (Hex) range (0.16 - 0.29) with an average value of (0.23). The gamma Index (Iγ) range (0.44 - 0.81) with an average value of (0.64). The average values of the specific activity of (238U, 232Th, 40K and137Cs), radium equivalent activity, indoor and outdoor annual effective dose rates, internal and external hazard index, and gamma index, all were found to be lower than their corresponding allowed limits.
تاريخ النشر
07/07/2016
الناشر
Journal of Chemical, Biological and Physical Sciences
عدي طارق صبحي البياتي | Auday Tariq Subhi AlBayati | 2687