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Assessment of Outdoor Terrestrial Gamma Radiation Dose Rates of Serule Village, Botswana |
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PP: 139-143 |
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doi:10.18576/jrna/080206
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Author(s) |
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Sankwasa Chika,
Machel Mashaba,
Nyaladzi Palalani,
Sebitla Lesolle,
Theo Theophilus Ramontshonyana,
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Abstract |
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| Terrestrial Gamma Radiation Dose rate (TGRD) measurements were carried out in 45 locations across this village, to determine the dose distribution across the entire village. The mean value for the distribution, annual effective dose, and associated cancer risks were determined. The TGRD rate measurements were carried out using a calibrated Thermo scientific FH40G-L10 survey meter, while the sampling positions across the studied area were determined using a Garmain GPS. The gamma isodose map was generated using ARCGIS 9.3 software to illustrate the dose distribution across the entire village. The TGRD rates were found to range between 80-180 nGy/h, with a mean value of 117.3 nGy/h. This value is two times higher than the world average of 59 nGy/h. The average outdoor annual effective dose to the public was found to be 0.137089 mSv/annum with an average cancer risk of 0.000559. |
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