Ryu Chan-Ju
Department of Nuclear Medicine, CHA Bundang Medical Center, CHA University School of Medicine, Pocheon-si.
Department of Radiology, Baekseok Culture University, Cheonan-si, Republic of Korea.
Nucl Med Commun. 2025 Mar 1;46(3):187-192. doi: 10.1097/MNM.0000000000001939. Epub 2024 Dec 9.
With the advancement of radiotherapy technology in the medical field, the amount of radioactive waste has rapidly increased, and the International Atomic Energy Agency (IAEA) has proposed waste deregulation standards based on individual dose, collective dose, and nuclide concentration. The purpose of this study is to define the standard period (1 day) required to measure collected radioactive waste using direct and indirect methods with a radioactivity meter, ensure that the radiation dose remains below the allowable level, and transport the waste safely. In this study, 131 I low-dose (30 mCi) radioactive waste discarded after radioiodine treatment at a medical institution was collected, and a measuring container was prepared to measure radioactivity concentration according to IAEA standards. The experiments showed that the minimum number of days required for the contamination levels of the inner and outer parts of containers and therapeutic plastics to fall below the tolerance limit were 6, 1, and 5 days, respectively. Conversely, the contamination levels measured immediately after 131 I treatments in the cases of Styrofoam and paper boxes were below the tolerance limit. The study emphasizes the need for a safe disposal process and active radioactive waste management operations by radioactive waste transporters by specifying the scope for safe transportation beyond the permissible limit.
随着医学领域放射治疗技术的进步，放射性废物的数量迅速增加，国际原子能机构（IAEA）已根据个人剂量、集体剂量和核素浓度提出了废物管理标准。本研究的目的是确定使用放射性测量仪通过直接和间接方法测量收集到的放射性废物所需的标准时间（1天），确保辐射剂量保持在允许水平以下，并安全运输废物。在本研究中，收集了某医疗机构在放射性碘治疗后丢弃的131I低剂量（30 mCi）放射性废物，并根据国际原子能机构标准准备了一个测量容器来测量放射性浓度。实验表明，容器内部和外部以及治疗用塑料制品的污染水平降至耐受极限以下所需的最少天数分别为6天、1天和5天。相反，在聚苯乙烯泡沫塑料和纸箱的情况下，131I治疗后立即测量的污染水平低于耐受极限。该研究强调，通过规定超出允许极限的安全运输范围，放射性废物运输者需要进行安全处置过程和积极的放射性废物管理操作。
