ACTIVITY CONCENTRATION OF NATURAL RADIONUCLIDES AND ITS ASSOCIATED RADIOLOGICAL HAZARDS IN FISH (BONGA SHAD) SAMPLES OF THE COASTAL COMMUNITIES OF OKRIKA, RIVERS STATE, NIGERIA
Abstract
A study was conducted of radionuclides concentration and
radiological hazards in Fish (Bonga Shad) samples between
latitude: 40.43'44" N and 40.45'57" N and longitude range of of
70.3'20" E to 70.6'42" E of the Coastal communities of Okrika, in
Rivers State, Nigeria using gamma spectroscopy method with
NaI (TI) detector. The average activity concentration of
radionuclides of ranged from 104.88 to 1271.04 with a mean
value of 551.47Β±336.50 Bq/Kg, varied from 1.04 to 49.35 with a
mean value of 13.67Β±14.47 Bq/Kg and ranged from 4.47 to
16.62 with a mean value of 8.81Β±3.32 Bq/Kg in terms of 40K,
238U, and 232Th respectively. The Radium equivalent (Raeq)
ranged from 30.05 to 170.99 with a mean value of 68.73Bq/Kg
which is lesser than the recommended limit of 370 Bq/Kg. The
Total effective dose ranged from 22.49 to 106.49 with a mean
value of 38.58Β±27.54 ππΊπ/π, which is below the safe limit of
70ππΊπ/π (UNSCEAR) and far lesser than the recommended limit
of 1mSv/y(ICRP). The Internal Hazard index (Hin) ranged from
0.11 to 0.60 with a mean value of 0.22Β±0.16 which is below the
safe limit of 1.0 (UNSCEAR). These values implies that the
exposure or ingestion of Fish (Bonga Shad) samples of coastal
communities of Okrika pose no radiological risks.
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Published in Salem Journal of Science, Information & Communication Technology
ISSN: 627-4467X
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