Radiation dose estimation from the radioactivity analysis of cement used in Nigeria

Publication Issue: 
Volume 30, Number 1-4, 2009
Page No: 
Date Received: 
Monday, June 15, 2009
Authors' Name: 
Faweya Ebenezer Babatope
Authors' Affiliation and Address: 
Department of Physics, Faculty of Science, University of Ado-Ekiti, PMB 5363, Ado, Ekiti-State

Studies have been carried out using gamma-spectrometric techniques to determine the
natural radioactivity in cement used in Nigeria and associated radiation hazard. The mean
values of 40K, 238U and 232Th are 140.5, 30.1 and 62.7 Bqkg−1 respectively. The measured
activity concentrations of these radionuclides were compared with the reported data of
other countries. The outdoor dose rates, indoor dose rates, annual outdoor effective dose
rates, annual indoor effective dose rates, external and internal hazard indices, Radium
equivalent and representative level index were calculated and compared with the
internationally approved values. The Raeq and Igamma values of all the studies samples are in
agreement with the internationally accepted values. The values of both external and internal
hazard indices are less than unity. The use of cement as building materials in Nigeria is in
accord with the OECD criterion.

PDF icon [007-010]-faweya.pdf93.23 KB