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Table of Content

    20 June 2022 Volume 42 Issue 3
      
    Overview
    Research Status of the Occupational Health of Interventional Radiation Workers in China
    Zhang Lanrui, Dong Juancong
    RADIATION PROTECTION BULLETIN. 2022, 42(3):  1-5. 
    Abstract ( 168 )   PDF (729KB) ( 413 )  
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    With the increasing complexity of interventional surgery, the risk of radiation exposure of interventional radiation workers has received widespread attention. We analyse and summarise the reports related to the exposure dose, health status and the use of protective equipments in the field of interventional radiotherapy in China. It′s expected to provide reference for the improvement of health monitoring technology research and radiation protection equipment development in the respect.
    Several Simple Dust Removal and Decontamination Methods in Glove Boxes for Nuclear and Radiation Operations
    Wang Maocheng
    RADIATION PROTECTION BULLETIN. 2022, 42(3):  6-9. 
    Abstract ( 112 )   PDF (1095KB) ( 475 )  
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    Aiming at the cleaning and removal of dust particles inside glove boxes for nuclear and radiation operations, several simple methods, including solvent wiping, adhesive decontamination and handheld vacuuming, are briefly summarised. Based on the practical experience of decontamination, their advantages and disadvantages are analysed, with some suggestions put forward.
    Ariticles
    Levels of 7Be and 40K in Fallout in Urumqi from 2017 to 2021
    Zhu Jidong, Wang Jianchao
    RADIATION PROTECTION BULLETIN. 2022, 42(3):  10-15. 
    Abstract ( 150 )   PDF (1837KB) ( 81 )  
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    To understand the environmental radiation status in Urumqi, we monitored 7Be and 40K levels in fallout from 2017 to 2021. It showes that the 5-year average of 7Be is 1.94 Bq/(m2·d), with the maximum of 2.8 Bq/(m2·d) and the minimum of 1.1 Bq/(m2·d). For 40K, the results are 354.3, 1 050, and 104 mBq/(m2·d) respectively. Both radionuclides are at normal natural levels, and the 5-year measurements are basically stable.
    Monitoring and Analysis of Environmental Electromagnetic Radiation Level in Urumqi from 2016 to 2021
    Zhao Qiwen, Aikeremu·Ailiken
    RADIATION PROTECTION BULLETIN. 2022, 42(3):  16-18. 
    Abstract ( 76 )   PDF (5511KB) ( 53 )  
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    To grasp the situation of electromagnetic environment in Urumqi, We carried out electromagnetic environmental monitorings from 2016 to 2021, with the representative regional points as survey objects. The results show that, the regional average value of the radio frequency comprehensive field is far lower than the public exposure control limit in the national standard. The status quo of electromagnetic environment in Urumqi is good.
    Analysis on the Diurnal Variation of Radon Concentration and the Influence of Meteorological Condition on It in Beijing
    Gan Ruilin, Gao Peng, Li Jianjie, Yan Shouliang
    RADIATION PROTECTION BULLETIN. 2022, 42(3):  19-22. 
    Abstract ( 89 )   PDF (1921KB) ( 269 )  
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    Radon and its daughters are important sources of natural exposure to human beings. The variation of radon concentration in the atmosphere is significantly affected by variation of meteorological condition. We carried out a two-year full-time measurement using a continuous measurement device for radon and its daughters. Based on the cluster theory, the influence of meteorological condition therein is analyzed. This could be a reference for the study of radon and its daughters in the atmosphere.
    Experiences
    Practical Exploration of Decontamination Method for Radioactively Contaminated Air Pipes
    Li Yuxin,Yang Jingping
    RADIATION PROTECTION BULLETIN. 2022, 42(3):  23-29. 
    Abstract ( 88 )   PDF (5710KB) ( 124 )  
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    The maintenance of nuclear power plants is likely to give rise to lots of radioactively contaminated air pipes. Due to the complex structure, it is difficult to remove radioactive contamination therein. So they are mostly treated as radioactive waste in the enterprises. As a high-priced control area dedicated tool, its scrapping has, to some extend, brought pressure to cost control, radioactive waste minimization and radiation protection optimization. Given all this, we carried out a series of decontamination tests, with a process combined with chemical, mechanical, and ultrasonic techniques. As a result, a number of air pipes after use have been decontaminated and reused.
    Analysis of the Results of the Participation in the National Biological Dose Estimation Capability Assessment from 2016 to 2020
    Zhao Qinhong, He Ling, Ling Pan, Chen Xiyang
    RADIATION PROTECTION BULLETIN. 2022, 42(3):  30-32. 
    Abstract ( 97 )   PDF (695KB) ( 69 )  
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    With the retrospective survey, we collect the data of our laboratory 's participation in the national biological dose estimation capability assessment from 2016 to 2020, and analyse factors affecting biological dose estimation results. It shows that among the 10 samples evaluated, the relative deviation of dose estimation value was within ±20% in 8 samples and the relative deviation of dose estimation value was beyond ±20% in 2 samples. The results suggest that system errors and personnel competence are the main factors affecting the assessment results,establishing the dose-effect curve, and strengthening the analytical ability for dicentrics and rings is the key to reducing system errors and improving the quality of laboratory assessment.
    Management
    Challenges and Opportunities Posed by Drones to Nuclear Security Management
    Zong Bo, Bao Jiabin, Fu Jiajia, Tang Wencai, He Jialin, Li Da
    RADIATION PROTECTION BULLETIN. 2022, 42(3):  33-38. 
    Abstract ( 208 )   PDF (747KB) ( 504 )  
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    Nuclear security is an important part of national security, with the main task of preventing illegal theft and use of nuclear materials as well as nuclear terrorist attacks. In recent years, with development and progress of technology, the continuous reduction of manufacturing costs, and the growth of application models, the consumption of drones has rapidly strengthened. This has led to the increasing availability of drones, and occasional incursions of drones into sensitive facilities. The impact of drones on the security of critical infrastructure, such as nuclear facilities, poses a challenge to the security of nuclear materials and facilities, and has attracted common concern in the industry. The China Atomic Energy Agency, as the competent authority for nuclear security, pays attention to the impact of drones on nuclear security, has formulated relevant standards for drone defense systems at nuclear facilities, and encouraged nuclear facility operators to establish drone detection and disposal measures to respond to intrusion of drones. However, as an excellent basic platform, the prospect of drones reasonably applied to the nuclear field, is also very broad, which can greatly improve work efficiency and safety level. We introduce herein the malicious use, prevention and response, and normal application of drones respectively, and then discuss some ideas about drone management.