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Measurement of Environmental Gamma Radiation Dose Rates and Estimation of Radiation Risk near the Construction Site of the Nuclear Power Plant, Indoor and Outdoor Locations of the Research Reactor, and Coal-Fired Thermal Power Plant Area |
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PP: 193-203 |
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Author(s) |
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S. Yeasmin,
S. K. Das,
N. Sultana,
M. M. M. Siraz,
M. S. Rahman,
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Abstract |
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| Gamma radiation dose rates have been measured at 300 monitoring points in the vicinity of the construction of
the Rooppur Nuclear Power Plant (RNPP) site, the Centre of Research Reactor (CRR), and the Barapukuria Coal Mine
Company Limited (BCMCL) in Bangladesh. The main objective of this study is to detect any potential release of natural or
artificial radionuclides from these facilities. A Geiger Muller digital survey meter gamma scout, positioned 1 meter above
ground level, was used for real-time gamma dose assessment at each monitoring point, and a GARMIN eTrex personal
navigator was used to record Global Positioning System (GPS) coordinates. The mean gamma dose rates recorded in realtime were 0.100 ± 0.033 µSvh-1
for RNPP, 0.235 ± 0.007 µSvh-1
for indoor, and 0.173 ± 0.005 µSvh-1 for outdoor of the
CRR in Atomic Energy Research Establishment (AERE) area, and 0.133 ± 0.014 µSvh-1
for the BCMCL. Corresponding
average annual effective doses for these locations were 0.176 ± 0.059 mSvy-1
, 1.649 ± 0.049 mSvy-1
, 0.303 ± 0.008 mSvy1
, and 0.233 ± 0.025 mSvy-1
, respectively. Additionally, the estimated lifetime cancer risk (ELCR) was determined for each
study area, resulting in values of 0.74 × 10-3
for RNPP, 6.91 × 10-3
for indoor and 1.27 × 10-3
for outdoor CRR, and 0.98 ×
10-3
for BCMCL, respectively. Based on the findings of this study, the estimated mean annual effective dose is not
anticipated to pose a significant additional risk from a radiological health perspective. |
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