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Assessment of Background Exposure Level in Some Selected Scrap Metals Dumpsites in Keffi Metropolis, Nasarawa State, Nigeria |
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PP: 27-32 |
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doi:10.18576/jrna/100105
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Author(s) |
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Markus Godwin,
Lumbi W. Lukas,
Idris M. Mustapha,
Abdullahi A. Mundi,
Sidi M. Aliyu,
Abbas A. Auta,
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Abstract |
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| In this study, the background exposure level of some selected scrap metal dumpsites in Keffi metropolises, Nasarawa State, Nigeria was assessed. A total of ten dumpsites were selected and the exposure rate for three sampling points for each of the dumpsites was measured using a Ludlum micro survey meter. The survey meter was held at an elevation of 1.0 m above ground level and a geographical positioning system (GPS) was used to record the location. The radiological hazard indices such as absorbed dose rate, annual effective dose rate, and excess lifetime cancer risk were calculated. The result of exposure rate, absorbed dose rate, annual effective dose, and excess lifetime cancer risk are in the range of 5.00-8.5 µR/h, 43.50-73.95 nGy/h, 0.0534- 0.0907 mSv/y and 0.1867- 0.8800, respectively. The calculated annual effective dose is within the recommended dose limit by ICRP and UNSCEAR. This indicates that the inhabitants around scrap metal dumpsites in Keffi metropolis and its workers are safe from radiation hazards. However, no radiation level is too low for it to accumulate and become hazardous to human health. There is a need to educate, and create awareness among scrap metals dumpsite workers and members of the public around the dumpsite on the risks associated with background radiation and precautions to take. |
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