Assessment of Natural Radionuclide Contents in Water and Sediments from Asa-Dam, Ilorin, Nigeria

Abstract Natural radionuclides content of 238U, 232Th and 40Kfor water and sediment samples collected from Asa-dam Ilonn. Nigeria weremeasured using Nal(TI) detector. The mean activity concentration in the water samples were 6.05, 3.23 and 9.65 Bql−1 for 238U, 232Th and 40Krespectively. The mean activity concentration of 238U, 232Th and 40Kmeasured in the sediment samples were 7.57, 8.19 and 73.48 Bql−1 respectively. Theactivity concentration of 40Kwas higher than that of 238U and 232Thfor the water and sediment samples. All measured activity concentration and estimated radiological parameters were below world permissible limit values. Therefore, there may be no serious immediate radiological health burden on the environment and the people using the dam.