Terrestrial Gamma Radiation Exposure Measurement and Risk Estimates in the Environments of Major Industries In Ota, Nigeria
Keywords:exposure rates in the air, risk estimates
AbstractWhen fast estimates are required, the in-situ method is more appropriate as this allows for quick results; preventing further exposure of the public and permitting quick intervention. Measurements of the terrestrial gamma radiation exposure have been carried out in the environments of major industries in Ota using a portable survey meter. The motivation for this study resulted from the uncertainty in the general public opinion on the effect of the presence, and activities of some of these industries in their environment. Measurements were taken twice daily within the vicinity of each industry to determine the dose levels. The mean values obtained range from 0.11 – 1.80 µSv/h. These values are within the results obtained from normal background areas except for site number 10. Annual effective dose values range from 0.25 – 5.21 mSv with a mean value of 1.21 mSv. Routine activities in some of these environments may have contributed significantly to the ambient natural background radiation resulting in high values as obtained in some of these locations. The total risks disparately estimated for cancer and genetic effects resulting from the results obtained range from 0.17 x 10-4 – 3.80 x 10-4 with a mean value of 0.94 x 10-4. These levels are within the range of the average annual risk for accidental death for all industries.
Ademola J. A. and Oguneletu O. P. (2005) Radionuclide content of concrete building blocks and radiation dose rates in some dwellings in Ibadan, Nigeria. Journal of Environmental Radiaoctivity 81(1):107 – 113.
Akinloye M. K., Oni O. M. and Ajisope E. O. (2004) Indoor radiation exposure rates in some buildings in Ogbomoso. Nigerian Journal of Physics 16(1): 76 – 78.
Akinloye M. K., Oladipo, A. E, Babalola A. M. and Abodunrin O. P. (2010) Gamma-ray measurements in the indoor environments of buildings in an indigenous area of Ogbomoso, Nigeria. Science Focus, 15(2): 159 – 164.
Akinloye M. K., Abodunrin O. P. and Ogungbade T. O. (2012) Effects of coverings on radiation exposure rates in some indoor environments. LAUTECH Journal of Engineering and Technology, 7(1): 109 – 112.
Ajayi O. S. (2000) Environmental gamma radiation indoors at Akure, Southwestern Nigeria. Journal of Environmental Radioactivity 50(3): 263 – 266.
Baxter M. S. (1993) Environmental radioactivity: a perspective on industrial contributions. IAEA Bulletin, 2/1993.
Chad-Umoren Y. E., Adekanmbi M. and Harry S. O. (2006) Evaluation of indoor background ionizing radiation profile of a physics laboratory. Working and Living Environmental Protection 3(1): 1 – 8.
Dimovska S. Stafilov T. and Sajn R. (2011) Radioactivity in soil from the city of Kavadarci (Republic of Macedonia) and its environs. Radiation Protection Dosimetry (2011): 107 – 120.
HPA (2009) Health Protection Agency. Radon and Public Health. Report of the independent advisory group on ionizing radiation (radon, chemical and environmental hazards). RCE-11. Appendix H2, Table H1.
ICRP Publication 60 (1991) 1990 Recommendations of the international commission on radiological protection. Annals of the ICRP, 21(1-3). Pergamon Press, Elmsford, NY.
ICRP Publication 103 (2007) The 2007 Recommendations of the International Commission on Radiological Protection. Annals of the ICRP.
Loomis D., Bena J. F. and Bailer A. J. (2003) Diversity of trends in occupational injury mortality in the United States, 1980–96. Injury Prevention, 9:9–14.
Mokobia and Balogun, (2003) Background gamma terrestrial dose rate in Nigeria functional coal mines.
NCRP 116 (1993) Limitation of exposure to ionizing radiation. National Council on Radiation Protection and Measurements, Bethesda, MD.
Nwanko L. I. and Akoshile C. O. (2005) Derivation of indoor gamma dose rate from high resolution in-situ gamma detector.
Okeji M. C. and Agwu K. K. (2011) Assessment of indoor radon concentration in phosphate fertilizer warehouse in Nigeria. Radiation Physics and Chemistry 81(3): 253 – 255.
Turner J. E. (1995) Atoms, radiation, and radiation protection. John Wiley & Sons, Inc., 2nd Edition.
Vaillant L. and Bataille C. (2012) Management of radon: a review of ICRP recommendations. Journal of Radiological Protection, 32: R1 – R12. Doi:10.1088/0952-4746/32/3/R1.
UNSCEAR (1988) Sources, effects and risks of ionizing radiation. 1988 report to the general assembly with annexes. United Nations Sales Publication, E88.IX.7. United Nation. New York.
UNSCEAR (2000) United Nations Scientific Committee on the effects of atomic radiation. Sources and effects of ionizing radiation. Report to the general assembly, vol. 1 Annex B.
How to Cite
Copyright (c) 2016 Abodunrin Oluwasayo Peter
Copyrights and publishing rights of all the texts on this journal belong to the respective authors without restrictions.
This journal is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License (full legal code).
See also our Open Access Policy.