Evaluation of Annual Individual Effective Dose in Soil Samples of Fuel Fabrication Facility (FFF) at Al-Tuwaitha Nuclear Site

In this research the annual individual effective doses (AIED) for workers during the decommissioning activities of the Fuel Fabrication Facility (FFF) at Al-Tuwaitha nuclear site were calculated, the calculation of (AIED) was obtained with sequence of calculations proceeds along choice of scenario, pathways of exposure, and choice of parameter values. Six samples of contaminated soil (S1, S2, S3, S4, S5, and S6), were collected from (FFF). The activity concentrations of these samples were measured by (HPGE detector) gamma-ray spectrometry analysis system. The analysis show that these samples contain naturally occurring radioactive material (NORM) with activity concentration values higher than the world mean values of , , and which evaluated 35, 30, and 400 respectively, specified by the UNSCEAR (2000). The activity concentrations range from 193.56±14.5 to 475.50±25.8 for Potassium-40, from 1031±119.9 to 7387.1±644.8 for Radium-226, from 10.89±2.6 to 20.251±2.4 for Thorium-232, from 7286.4±223.9 to 134280±2700.8 for Uranium-238, and from 162.33±5.8 to 1294.4±27.7 for Uranium-235. We found the values of (AIED) were ranged between 177.53 and 2722.16 for a worker in land