Radiation Protection and Environment

ORIGINAL ARTICLE
Year
: 2020  |  Volume : 43  |  Issue : 1  |  Page : 36--43

Natural radionuclides in rock and radiation exposure index from uranium mine sites in parts of Northern Nigeria


Samuel Odumu Ogana John1, Iyabo T Usman2, Timothy C Akpa3, Sadiq Aliyu Abubakar4, Godwin B Ekong3 
1 Department of Physics, Nasarawa State University, Keffi, Nigeria
2 Nuclear Structure Research Group (NSRG), School of Physics, University of the Witwatersrand, Johannesburg, South Africa
3 Department of Physics, Nasarawa State University, Keffi; Radiological Safety Department, Nigerian Nuclear Regulatory Authority, Abuja, Nigeria
4 Department of Physics, Federal University of Lafia, Lafia, Nasarawa State, Nigeria

Correspondence Address:
Samuel Odumu Ogana John
Department of Physics, Nasarawa State University, PMB 1022, Keffi
Nigeria

Radiation exposure in humans can emanate from natural radionuclides through uranium and thorium decay series as well as40K due to emitted ionising radiations. It is important to estimate the exposure of humans to the diverse sources of radiation. In this study, the activity concentrations of natural radionuclides238U and232Th in granitic rock samples from uranium mine sites in parts of Northern Nigeria were measured, by inductively coupled plasma-mass spectrometry. The highest values of238U and232Th concentrations (924.56 ± 17.13 and 21.96 ± 1.28 Bq/kg, respectively) were observed at Mika-I and Riruwai. Furthermore, the radiological exposure parameters (i.e., absorbed dose rate in air [D], annual effective dose [external], radium equivalent activity (Raeq), external exposure index (Hex), internal exposure index (Hin), and representative level index (Iγand Iα) were estimated and compared to the international recommended values. In terms of terrestrial gamma radiation from granitic rock within the study area, it does not pose any significant radiation exposure to the workers and dwellers.


How to cite this article:
Ogana John SO, Usman IT, Akpa TC, Abubakar SA, Ekong GB. Natural radionuclides in rock and radiation exposure index from uranium mine sites in parts of Northern Nigeria.Radiat Prot Environ 2020;43:36-43


How to cite this URL:
Ogana John SO, Usman IT, Akpa TC, Abubakar SA, Ekong GB. Natural radionuclides in rock and radiation exposure index from uranium mine sites in parts of Northern Nigeria. Radiat Prot Environ [serial online] 2020 [cited 2020 Sep 28 ];43:36-43
Available from: http://www.rpe.org.in/article.asp?issn=0972-0464;year=2020;volume=43;issue=1;spage=36;epage=43;aulast=Ogana;type=0