江西省2012年医院放射工作人员个人剂量监测及异常值原因分析

发布时间：2018-07-01 08:46

本文选题：医院放射工作人员 + 个人剂量　；参考：《东华理工大学》2013年硕士论文

【摘要】：对放射工作人员进行个人剂量监测是国家规定的受照剂量评价的法定手段，能定量评价放射工作人员受照剂量的大小及工作环境的放射安全程度；调查异常值以及发生的原因是为了提高监测工作的准确度，，并防止过量照射造成辐射损伤，保证放射工作人员的健康。本研究调查了2012年江西省某研究院进行个人剂量监测的总共2382名医院放射工作人员的外照射个人剂量水平，根据相关国家法律法规的要求，采用热释光剂量方法对外照射个人剂量进行监测，对不同工种、不同地区及不同年份的监测率和个人剂量的频度进行统计和分析；并对每个周期中出现的异常值进行了分类统计，并通过发放调查表格，结合现场调查和电话咨询核实个人剂量异常的原因；通过盲样比对以及对个人剂量监测的不确定度的评定来保证该研究院的个人剂量监测的准确度。江西省2012年医院放射工作人员的个人剂量监测率达到74.04%，有待进一步提高；年有效剂量均小于国家标准规定职业人员的剂量限值20mSv，符合安全标准，绝大多数放射工作人员的年有效剂量小于2mSv；全省医院放射工作人员接受个人剂量监测人数在逐年增加，人均年有效剂量有不显著程度的减小；2012年内总共出现异常值101人·次，受到过量照射的仅有11人·次，其余均由人为原因造成；3组盲样测量的相对偏差均不大于30%，判定盲样比对的结果为合格，其相对扩展不确定度的计算结果均在8%左右，满足国家规定的实验室条件下剂量测量的相对不确定度不超过10％的要求。建议医院、放射工作人员以及检测单位都必须重视个人剂量监测的重要性，减少人为影响因素，使测得的个人剂量值真实反映工作人员的实际受照剂量水平。
[Abstract]:The personal dose monitoring of radiation workers is a statutory means to evaluate the dose of the irradiated dose stipulated by the state. It can quantitatively evaluate the size of the irradiated workers and the degree of radiation safety in the working environment. The investigation of abnormal values and causes is to improve the accuracy of monitoring and prevent radiation from excessive radiation. Damage to ensure the health of the radiation workers.
This study investigated the individual dose level of 2382 hospital radiation workers in a total of 2382 hospital radiological workers monitored by a research institute in Jiangxi Province in 2012. According to the requirements of relevant national laws and regulations, a thermoluminescence dose method was used to monitor the individual dose of external exposure, monitoring different types of work, different areas and different years. Statistics and analysis of the frequency of the rate and the individual dose, and the statistics of the abnormal values in each cycle, and the reasons for the verification of the abnormal dose of individual dose by the survey form, the field investigation and the telephone consultation, and the evaluation of the uncertainty of the individual dose monitoring to guarantee the Institute. The accuracy of individual dose monitoring.
The individual dose monitoring rate of the hospital radiation workers in Jiangxi in 2012 is 74.04%, which needs to be further improved. The annual effective dose is less than the national standard prescribed by the professional personnel of 20mSv, which meets the safety standard, the annual effective dose of the vast majority of the radiation workers is less than 2mSv; the hospital radiant workers in the province accept individual The number of dose monitoring increased year by year, and the annual per capita effective dose decreased significantly. In 2012, there was an abnormal value of 101 persons and times, only 11 people were exposed to excessive exposure and the rest were caused by human reasons; the relative deviations of the 3 groups were not more than 30%. The results of the blind sample comparison were qualified and their relative expansion was relatively extended. The calculation results of uncertainty are around 8%, which meet the requirements of the relative uncertainty of dose measurement under the state prescribed laboratory conditions. It is suggested that hospitals, radiological workers and testing units should attach importance to the importance of individual dose monitoring, reduce human influence factors and make the measured individual dose values true. The actual dose level of the staff is illuminated.
【学位授予单位】：东华理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：R144

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