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Concentrations of NORM and radiological hazard indices were surveyed and assessed in well numbered of one, two and three from the Maysan oil field in southern Iraq.The geographic distributions of natural-radionuclide-ray activities and their hazard indices in 226Ra, 232Th, and 40K nuclei were all determined in samples collected from different depths, including Halfaya wells in Maysan Governorate.226Ra observation was mainly between 2 (average radiation concentration).63 to18.8 Bq.kg-1, 1. 18 to18.6 Bq.mg-¹for 232Th is 150, and for 40K it is 156. 4 to 561 Bq. kg-1.Radium-equivalent activities (Raeq), the internal hazard index (Hin), the external hazard index (Hex), a gamma representative radiation level index (Iγr), and excess lifetime cancer risk (ELCR) have been calculated.During the Raeq range from 18 to a maximum and minimum Raeq.39and 82.33 Bq.kg-1, respectively.The ambient level dose rates in air arising from the concentration of these three radionuclides were in the range of 9. 26 to 40.47nGy/h, after wars the external annual effective dose rate of the areas achieved was in between 005and 0. 22 mSv/y.
Salim et al. (Fri,) studied this question.
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