en Radiobiology Radiobiology تحقيق بديع Original Research <div style="text-align: justify;">Background: Radioactive material through scrap metal dealers, is often sold to steel processing facilities, which contaminate products with associated waste ends up in the environment. This study was to conduct radiological assessment of ¹³⁷Cs contaminated at metal processing facility and surrounding environment at Southern Nigeria as a function of time. Materials and Method: Samples were randomly collected within the facility and at surrounding environment, and analyzed using HpGe detector. Results: The ¹³⁷Cs concentration ranged (1.61&plusmn;0.25- 2619.35&plusmn;133.80) Bq/g, with mean of 417.17&plusmn;23 Bq/g. The ¹³⁷Cs concentration at 500 meters from the facility ranged (0.21&plusmn;0.02- 3.63&plusmn;0.25) Bq/g with the mean of 1.30&plusmn;0.16 Bq/g. The ¹³⁷Cs concentration in the facility was above admissible limit of 100 Bq/g except that recorded at 500 meters away. The radiological hazards within the first year were estimations, which showed Dose through Inhalation Pathways was 6.89x10^-3mSv/yr. Dose through Soil Ingestion Pathways was 0.91 mSv/yr, and Sum External Dose from all the Pathways to be 1.44 x10³mSv/yr. The sum of evaluated radiological risk was found to be higher than the 0.25 mSv/yr or 1 mSv/yr admissible limits. An evaluated Excess Life Cancer Risk was found to be 2.5 quite above admissible limit of (029x10^-3). Conclusion: It is inferred from the assessment that, there is a likelihood of radiological health risk due ¹³⁷Cs contaminated to workers, public and other biota. Therefore, immediate remediation is recommended and as well as restrictions of the public using materials from the area for soil stabilization and farming purpose.</div> Cesium-137, radioactive contamination, metal recycling. 599 606 http://ijrr.com/browse.php?a_code=A-10-2188-34&slc_lang=en&sid=1 I. Sambo isasambo@yahoo.com 7900319475328460020258 7900319475328460020258 Yes Department of Radiological Safety, Nigerian Nuclear Regulatory Authority, Plot 564/565 Airport Road, Central Business District, Garki, Abuja, FCT, Nigeria G.B. Ekong gobass04@yahoo.com 7900319475328460020259 7900319475328460020259 No Department of Radiological Safety, Nigerian Nuclear Regulatory Authority, Plot 564/565 Airport Road, Central Business District, Garki, Abuja, FCT, Nigeria