Evaluation of Natural Radioactivity and Assessment of Radiation Hazard Indices in Some Sediment Samples from Streams of East Algeria

The specific activities natural radionuclides have been measured in sediment samples collected from Beni Haroun Dam using gamma spectrometry. The mean activity concentrations of (238U, 235U and 232Th) as well as primordial 40K were found 52.54, 2.37, 19.60 and 183.92 Bq/kg, respectively. The study also examined radiation hazard indices, the mean values obtained are 66.5 Bq/kg, 0.18, 0.25,0.48 for Radium equivalent activity (Raeq), External Hazard index (Hex), internal hazard index (Hin) and Representative level index (Ig), respectively. In addition, Absorbed dose rate (D) and annual effective dose (AED) were found equal to 30.76nGyh-1 and 37.75mSvy-1, respectively. The results obtained in the current work are compared with analogue measurements from other locations