A study on the atmospheric dispersion of radionuclide released from TRIGA MARK II reactor using Gaussian Plume Model

TRIGA MARK II reactor is a research facility and site for neutron activation analysis. Should there be fuel rod damage for the first time, amongst its possible causes are human and environmental factor. Consequently, the study objectives were to determine types and released rates of radionuclides dispersed to air and deposited on land through core inventory using ORIGEN2 Codeto determine the concentrations of radionuclides released to air and deposited on land using Gaussian Plume ModelI-131 was 0.062 Bq/m3Kr-85 was 25.034 Bq/m3 and Xe-135 was 4.248 Bq/m3. The annual exposure doses for four selected radionuclides were 1326 ?Sv/yr (300 m), 119 ?Sv/yr (1000 m) and 7.463 ?Sv/yr (4000 m) for Category B, whereas for Category were 194 ?Sv/yr (300 m), 17.440 ?Sv/yr (1000 m) and 1.090 ?Sv/yr (4000 m), respectively. Conclusively, this study shows that in case of fuel rod damage on TRIGA MARK II reactor, radionuclide atmospheric dispersion at a distance of 300 m (Category B) was exceeding the standard annual exposure dose limit (1000 ?Sv/yr)