Cilt:08 Sayı:01 (2021)
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Item Nuclear Security and Nuclear Security Culture: An Overview(Ankara Üniversitesi Nükleer Bilimler Enstitüsü, 2022-11-22) Alkış, M. A.; Uluslararası İlişkiler; OtherThe article attempts to define what nuclear security means and give a historical background about factors that have shaped the international nuclear security approach. Then, the article briefly touches upon various international mechanisms which are components of the nuclear security regime. Finally, the article highlights the importance of nuclear security culture, which requires all relevant stakeholders to take responsibility in relation to nuclear security.Item Evaluation of Ionizing Radiation Profile in Hot-Lab of Nuclear Medicine Department to Eliminate Undue Radiation Phobia of Technologists in Cancer Hospital(Ankara Üniversitesi Nükleer Bilimler Enstitüsü, 2022-11-22) Waqar, M.; Afridi, T. A.; Soomro, Q.; Qasim, M.; Fizik; OtherThe risks related to the radiation exposures cannot be eradicated, but can be minimized by implementing radiation safety culture in the hot-labs. This study aimed to measure background radiation levels in hot-laboratory, arguably the area with the highest radiation level, where all radiopharmaceuticals are prepared in a cancer hospital.Ten distinct locations inside the hot-lab were periodically monitored with a pre-calibrated RM1001-RD LAMSE radiation survey meter for the period of one year. Daily dose rates were recorded and AEDR was calculated using standard notations. The dose rates on selected points were found ranging from 0.12 to 0.21 μSv/h while the Annual Effective Doses were found a maximum rate of 1.47±0.04 mSv/y and minimum 0.85 ± 0.03 mSv/y. These findings show t-test values with a level of significance of 5% (P<0.05). It is concluded that the dose rates in our setup are negligible as per the NRC dose limit of 20 μSv/h and AEDR is about 58% of the radiation limit of 2.4 mSv/y recommended by UNSCEAR. Therefore, the hotlab technologist is radio-biologically safe inside hot-lab with this setup having strict compliance with radiation protection protocols. This study give some findings about undue radiophobia in the hot-lab technologists worked in the Nuclear Medicine departments of cancer hospitals.Item Estimation of Effective Dose and Excess Lifetime Cancer Risks due to Ingestion of Natural Radionuclides in Rice Samples from Selected Farms in Southwestern Nigeria(Ankara Üniversitesi Nükleer Bilimler Enstitüsü, 2022-11-22) Arije, O. T.; Ayodele, A. E.; Olubi, O. E.; Fizik; OtherThis study was carried out to evaluate the radioactivity concentrations of 40K, 232Th and 238U in ten rice samples of the same species collected from different rice farms across Ondo and Ekiti States, southwestern Nigeria. The activity concentration measurements were determined using n–type co-axial HPGe detectors. In samples from one of the states (Ondo), the activity concentration was found to vary from 36.04 - 2139.35 Bq∙kg-1 for 40K, 0.12 - 79.23 Bq∙kg-1 for 232Th and 0.22 - 83.36 Bq∙kg-1 for 238U. In the other state (Ekiti), the value was found to vary from 3.99 - 2078.91 Bq∙kg-1 for 40K, 5.18 - 73.82 Bq∙kg-1 for 232Th and 14.50 - 83.21 Bq∙kg-1 for 238U. The mean annual effective dose to adults from the consumption of the rice were obtained as 0.93 and 0.84 mSv∙y -1 with excess lifetime cancer risk (ELCR) calculated to be 2.98 x 10-10 and 2.56 x 10-10 for Ondo and Ekiti, respectively. The values were compared with the internationally acceptable limits and were found to be lower compared to the acceptable world average ELCR value of 0.29 x 10–3 for radiological risk to the public by UNSCEAR. The rice samples from the locations are safe for human consumption.