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      Radiation level analysis of some non-medical institutions in Hangzhou


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          Objective The purpose of this study is to grasp the current situation of radiation protection in some non-medical institutions in Hangzhou, and to provide basis and reference for the relevant authorities departments to make the radioactive hazard factors monitoring plan for non-medical institutions.

          Methods The configuration of the personnel protective equipment and radiation level of radiation sources and radiation devices in 5 non-medical monitoring institutions in Hangzhou were investigated and analyzed by means of questionnaire survey and on-site detection.

          Results The radiation workers of 5 monitoring institutions have carried out personal dose monitoring, and their annual individual dose equivalent meets the requirements of relevant national standards. The ambient dose equivalent rates around the radiation source and radiation device room are lower than the minimum detection limit of the instrument. When the source is stored, the maximum ambient dose equivalent rates at 5 cm and 100 cm away from the external surface of the source container were 22.2 μSv/h and 2.0 μSv/h, respectively. When the source is in use, the maximum ambient dose equivalent rates at 5 cm and 100 cm away from the external surface of the source container were 44.3 μSv/h and 5.0 μSv/h, respectively.

          Conclusion Under normal operation, the radiation dose level of some non-medical monitoring institutions in Hangzhou is at a low level, while the ambient dose equivalent rates around the external surface of the source container is at a high level. Therefore, non-medical institutions should improve their awareness of radiation protection and strengthen radiation management.


          摘要: 目的 了解杭州市部分非医疗机构辐射防护现状, 为相关主管部门制定非医疗机构放射性危害因素监测规划 提供依据和参考。 方法 采用问卷调查和现场检测相结合的方式对杭州市 5 家非医疗监测机构的人员防护用品配置 及放射源和射线装置的辐射水平进行调查与分析。 结果 5 家监测机构均己开展个人剂量监测, 且个人年剂量当量满 足国家相关标准的要求; 放射源和射线装置机房周围剂量当量率检测结果均低于检测仪器的最低探测下限; 储源状态 时, 距源容器外表面 5 cm 和 100 cm 处的最大周围剂量当量率值分别为 22.2 μSv/h 和 2.0μSv/h; 源使用状态时, 距源 容器外表面 5 cm和100 cm 处的最大周围剂量当量率值分别为 44.3 μSv/h 和 5.0μSv/h。 结论 正常运行状态下, 杭州 市部分非医疗监测机构的放射源和射线装置所产生的辐射剂量水平处于低水平状态, 但部分距源容器外表面周围剂 量当量率值处于较高水平, 非医疗机构需提高辐射防护意识, 加强辐射管理工作。

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          Author and article information

          Chinese Journal of Radiological Health
          Chinese Preventive Medical Association (Ji’an, China )
          01 February 2021
          01 May 2021
          : 30
          : 1
          : 59-62
          [1] 1Hangzhou Hospital for the Prevention and Treatment of Occupational Disease, Hanghzou 310014 China
          [2] 2Institute of Radiation Medicine, Chinese Academy of Medical Sciences
          [3] 3Tianjin University
          Author notes
          Corresponding author: ZHAI Hezheng, E-mail: zhaihezheng@ 123456irm-cams.ac.cn
          © 2021 Chinese Journal of Radiological Health

          This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 Unported License (CC BY-NC 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See https://creativecommons.org/licenses/by-nc/4.0/.

          Journal Article

          Medicine,Image processing,Radiology & Imaging,Bioinformatics & Computational biology,Health & Social care,Public health
          Non-medical Institutions,Radiation Level,Radiation Protection


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