Salem Journal of Science, Information & Communication Technology

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 551.47±336.50 Bq/Kg, varied from 1.04 to 49.35 with a mean value of 13.67±14.47 Bq/Kg and ranged from 4.47 to 16.62 with a mean value of 8.81±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 38.58±27.54 𝝁𝑺𝒗/𝒚, which is below the safe limit of 70𝝁𝑺𝒗/𝒚 (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 0.22±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.