Estimating the Concentrations of Radioactive Radon Element along with the Radiation Risk Indicators at the Oncology and Nuclear Medicine Hospital in Mosul, Iraq
Rafidain Journal of Science,
2021, Volume 30, Issue 1, Pages 100-115
AbstractThe radioactive radon concentration was determined in addition to the radiation risk indicators represented by the effective annual dose and the effective alpha energy concentration, as well as the lung cancer cases per year at selected and different well-ventilated sites in the Oncology and NuclearMedicineHospital in Mosul. The long-term cumulative counting technique of nuclear traces deposited on the nuclear track detector CR-39. Twenty-five sites were chosen within the hospital in its multiple buildings (administration building, laboratory building and consulting building), where these reagents were installed in the lower part inside the radiometric dose room (Dosimetry) with certain geometric dimensions for 47 days as an irradiation time Calibration was performed with a 2µci radium(222Ra) source. The results showed that the radon concentrations recorded for all sites ranged between (41.44 - 79.88 Bq.m-3) with a rate of (59.32 ± 9.08 Bq.m-3) and could be considered within the global normal levels. As for the annual effective dose (HE), as its value ranged (1.3-2.52 mSv.y-1) with a rate of (1.84 ± 0.29 mSv.y-1), while the annual effective dose values ranged between (4.48-8.6 mWL) with a rate of 1.08 mWL (± 5.92, and the risk index is lung cancer). It included within the values (32.52-54.34 / 106 person) and a rate of (35.16 ± 5.39 / 106person), and these indicators can be considered in light of the results obtained as falling within the normal global levels. I indicated the sites of the refrigerator of refrigerated drugs, the office of mental health and the laboratory store the highest-level Radon concentration, as well as radiation hazard indicators, while its values were within the lowest levels recorded in the advisory path. The highest level of radon concentration as well as radiation risk indicators were identified at the sites of the medication refrigerator, the mental health clinic, and the laboratory store, although their values were below the lowest levels documented in the advisory corridor. The results showed that the Oncology and Nuclear Medicine Hospital is logically radio-safe, despite the fact that some of its sites reported high levels of radon concentration compared to other sites, especially when combined with appropriate global levels that do not exceed ( (200-300 Bq . m-3).
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