Estimation of Radiation Risk Due to Exposure to Terrestrial Radiation | Chapter 02 | Advances in Applied Science and Technology Vol. 4
An in-situ measurement of background
radiation level of Ewoi community in Ogbia Local Government Area of Bayelsa
State Nigeria was done using two radiation meters (Digilert-200 and
Radalert-100). Exposure ratemeasured ranged from 0.010 to 0.028 mRh-1 with mean
value of 0.016 mRh-1. The mean value of absorbed dose was 128.67 nGyh-1 while
the mean indoor and outdoor annual effective dose equivalents were 0.40 mSvy-1
and 0.13 mSvy-1 respectively. The mean excess lifetime cancer risk estimated
from both indoor
and outdoor effective
doses were 1.0
× 10-3 and
0.33 × 10-3 respectively. It
was observed that
all the radiological
parameters estimated from
the radiation exposure rate were
higher than their world average values except the annual effective doses. The
result of this study shows that Ewoi community recorded slightly high
background radiation level and this may be attributed to oil and gas
exploration activity in the area. The result of this work serves as
radiological baseline data of the area for future studies. Considering the
values obtained in this research work and the likely health impact, it is
important that further studies be
carried out on
activity concentration of
radionuclide on the
soil, water (drinking water resources
of the community),
and food crops
from Ewoi community
for identification of radionuclides present and their
concentrations in order to quantify their radiological health implicationand
ways to control it.
Author(s) Details
U. L. Anekwe
Department of Physics,
Federal University, Otuoke, Bayelsa State, Nigeria.
Dr Ibe Stephen Onyejiuwaka
Department of Physics,
Federal University Otuoke, Bayelsa, Nigeria.
View Volume: https://doi.org/10.9734/bpi/aast/v4
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