Health Risk Assessment of Natural Radioactivity in Wasteland Soils in Okakarara, Namibia..

Human activities such as waste disposal tend to impact negatively on the environment. Some products are associated with elevated levels of natural radioactivity. It was therefore, aim study investigate health risk radioactivity from Okakarara municipal dumpsite. In this study, gamma spectrometric analysis used determine activity concentrations 226Ra, 232Th and 40K in 18 soil samples. From these concentrations, some radiological parameters were calculated. The average (Bq.kg-1) 15.45±0.47, 18.00±0.55, 215.73±4.29, respectively. Raeq value 57.80±0.98 Bq.kg-1. all samples, values found be lower than worldwide 370 absorbed dose rate 27.00±0.44 nGy.h-1, whereas an 0.03 mSv.y-1 for AEDE is noted, which less 0.48 mSv, average. Annual Gonadal Dose Equivalent (AGDE) 190.89 μSv.y-1, a world 298 μSv.y-1. Representative Level Index (RLI) External Hazard (Hex) 0.43 0.16., These indices unity. excess lifetime cancer (ECLR) 1.16 x 10-4. This internationally acceptable limit 2.9 results it can concluded that wasteland area not issue concern.