Activity Concentrations of Radionuclides Norms in Soil Samples Around College of Education (Technical) Kabba, Kogi State, North Central, Nigeria

Generally, soil contains some natural radionuclide that emit radiation to the environment which eventually will cause a lot of health effect and excess radiological burden to human being at high concentration above the screening level.In this studies, the activities concentrations of naturally occurring radionuclide 226 Ra, 232 Th and 40 k were determined in soil samples from College of Education Technical, Kabba, Kogi State using a well calibrated and shielded Canberra 3 x 3 inch NaI(Tl) detector at the Department of Pure physics, Ladoke Akintola University of Technology, Ogbomosho.The results shows that samples from the study area have activity concentrations ranging between 7.99 0.65 to 28.27 1.41Bq/kg with mean value of 12.65 0.69Bq/kg for 226 Ra, 13.41 0.69Bq/kg to 22.66 0.89Bq/kg with means value 16.26 0.75Bq/kg for 232 Th and 197.5712.51 to 376.2 3.84Bq/kg for 40 k.The Radium equivalent in samples ranges from 48.41 to 81.98Bq/kg with mean value of 55.62Bq/kg.Also the external hazard index was found between 0.09 to 0.22 with mean value of 0.14.The value of absorbed dose rates in the samples ranges from 22.95 to 46.64nGy/h with mean value of 28.35nGy/h.The annual effective dose rate in the studied areas varies from 28 -57µSv/y with mean value of 35 µSv/y .The obtained values of natural radioactivity and gamma-absorbed dose rates due to the activity concentration of 226 Ra, 232 Th and 40 k of soil in air when compared with the international standard shows that none of the studied samples is considered a radiological hazard