Outdoor Background Radiation Level and Radiological Hazards Assessment in Lafia Metropolis, Nasarawa State, Nigeria
DOI:
https://doi.org/10.53797/aseana.v1i1.4.2021Keywords:
Radiation, radiological, assessmentAbstract
In this study, the assessment of the outdoor Background Radiation levels in Lafia Metropolis, Nasarawa State, Nigeria has been conducted. An in-situ measurement of outdoor background exposure rate count per minute for 20 locations was done using a well calibrated portable halogen-quenched Geiger Muller (GM) detector (Inspector alert Nuclear radiation monitor SN:3544) at an elevation of 1.0m above ground level with a geographical positioning system(GPS) for geographical location. Using an established radiological relations, the radiological health hazards and radiation effective doses to different body organs were evaluated using the measured outdoor background exposure rates. The values obtained were compared with recommended permissible limits to ascertain the radiological hazard status of the environment. The mean values of the outdoor background exposure levels (0.021 mRh-1), absorbed dose rates (184.875 nGyh-1) and excess lifetime cancer risk (0.794×10-3) are higher than their recommended safe limits of 0.013 mRh-1, 84.0 nGyh-1, 0.29×10-3respectively as recommended by UNSCEAR and ICRP. The mean annual effective dose equivalent (AEDE) (0.227 mSvy-1) is below recommended permissible limits of 1.00 mSvy-1 for general public exposure and also the effective doses to different body organs are all below the recommended limits of 1.0 mSvy-1. Generally, the study shows that Lafia Metroplis is relatively safe radiologically with little contamination which could be attributed to the geological formation and partly due to human activity in the area. However, the contamination will not pose any immediate radiological health effect on resident of the area but there is tendency for long –term health hazards in the future such as cancer due to doses accumulated.
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Agbalagba, E. O, Avwiri, G. O, & Ononugbo, C. P. (2016). GIS mapping of impact of industrial activities on the terrestrial background ionizing radiation levels of Ughelli metropolis and its Environs, Nigeria. Environmental Earth Science 75:1425 DOI : http://10.1007/s12665-016-6216-y.
Avwiri, G. O., Nwaka, B. U., & Ononugbo, C. P (2016). Radiological health risk due to gamma dose rates around Okposi Okwu and Uburu salt lakes, Ebonyi State. International Journal of Emerging Research in Management and Technology 5(9):36-46.
Darwish, D. A. E, Abul-Nasr, K. T. M., & El-Khayatt, A. M. (2015). The assessment of natural radioactivity and its associated radiological hazards and dose parameters in granite samples from South Sinai, Egypt. Journal of Radiation Research and Applied Sciences 8:17-25.
Farai, I. P., & Jibri, N. N. (2000). Baseline studies of terrestrial outdoor gamma doserate levels, in Nigeria. Radiat Prot Dosim, 88:247‐254.
Gupta, M., & Chauhan, R. P. (2011): Estimating radiation dose from building materials. Iran journal of radiation research, 9(3); 187-194 .
Ibikunle, S. B, Arogunjo, A. M., & Ajayi, O. S. (2018). Characterization of Radiation dose and Excess Lifetime Cancer Risk Due to Natural Radionuclides in soils from Some Cities in Southwestern Nigeria. J Forensic Sci & Criminal Inves., Volume - 10 Issue 4 - September 2018. DOI: http://10.19080/JFSCI.2018.10.555793.
International Commission on Radiological Protection .(ICRP). (2007). The 2007 Recommendations of the International Commission on Radiological Protection: Annals of the ICRP Publication Elsevier. 103:2-4.
International Commission on Radiological Protection . (ICRP). (1996). International Commission on Radiological Protection Age-dependent Doses to Members of the Public from Intake of Radionuclides. Part5: Compilation of Ingestion and Inhalation Coefficients ICRP Publication 72, Pergamon Press, Oxford.
Mokobia, C. E., & Balogun, F. A . (2004). Background gamma terrestrial dose rate in Nigeria functional coal mines. Radiat Prot Dosim, 108:169‐173.
Monica, S., Visnu, P. A. K., Soniya, S. R., & Jojo, P. J. (2016). Estimation of indoor and outdoor effective doses and lifetime cancer risk from gamma dose rates along the coastal regions of Kollam district, Kerala. Radiation Protection and Environment 39(1), 38-43.
Mubarak, F., Fayez-Hassan, M., Mansour, N. A., Talaat, S. A., & Abdallah, A. (2017). Radiological Investigation of High Background Radiation Areas. Scientific report, 7:15223. DOI: http://10.1038/s41598-017-15201-2.
National Council on Radiation Protection. (NCRP). (1993). National Council on Radiation Protection and Measurements: Limitation of exposure to ionizing radiation, NCRP report No.116.
Norman, E. B. (2008). Review of common occupational hazards and safely concerns for nuclear medicine technologist. Journal of Nuclear Med Tech, 36: 11‐17.
Osimobi , J. C., Agbalagba, E. O., Avwiri, G. O., & Ononugbo, C. P. (2015). GIS mapping and background ionizing radiation (BIR) assessment of solid mineral mining sites in Enugu State, Nigeria. Open Access Library Journal 2:1-9. http://dx.doi.org/10.4236/oalib.1101979.
Ononugbo, C. P., & Mgbemere, C. J. (2016). Dose rate and annual effective dose assessment of terrestrial gamma radiation in Notre fertilizer plant, Onne, Rivers State, Nigeria. International Journal of Emerging Research in Management and Technology 5(9):30-35.
Ugbede, F. O., & Benson I. D. (2018). Assessment of outdoor radiation levels and radiological health hazards in Emene Industrial Layout of Enugu State, Nigeria. International Journal of Physical Sciences, Vol. 13(20), pp. 265-272, 30. December, 2018. DOI: http://10.5897/IJPS2018.4763.
Rafique, M., Saeed, U. R., Muhammad , B., Wajid, A., Iftikhar, A., Khursheed, A. L., & Khalil, A. M. (2014). Evaluation of excess life time cancer risk from gamma dose rates in Jhelum valley. Journal of Radiation Research and Applied Sciences 7:29- 35.
Termizi, R. A., Aliyu, A. S., Agba, E. H., & Saleh, M. A. (2014). Effective dose from natural background radiation in Keffi and Akwanga towns, central Nigeria. International Journal of Radiation Research, Volume 12, No 1.
United Nations Scientific Committee on the effect of Atomic Radiation. (UNSCEAR). (2008). Report on the sources and effects of ionizing radiation. Report to the General Assembly with Scientific Annexes. United Nations, New York
Vasconcelos, D. C., Reis, P. A., Pereira, C., Oliveira, A. H., Santos, T. O., & Rocha, Z. (2013). Modelling natural radioactivity in sand beaches of Guarapari, Espírito Santo State, Brazil.
Vasconcelos, D. C., Oliveira, A. H., Silva, M. R., Penna, R., Santos, T. O., Pereira, C., ... & Menezes, M. Â. B. (2009). Determination of uranium and thorium activity concentrations using activation analysis in beach sands from extreme South Bahia, Brazil.
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Copyright (c) 2021 Idris Mohammed Mustapha, Rahmat Sadiq Tukur, Musa Mohammed, Muhammed Abdullahi Kana, Isah Suleiman Hamza, Aisha Bello, Umar Sa’ad Aliyu
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