2017—2018年松江区放射工作人员外照射个人剂量水平分析

目的 掌握松江区放射工作人员个人剂量水平，评价放射工作人员防护状况，进一步为放射工作人员的职业安全防护提供指导。方法 依据《职业性外照射个人监测规范》（GBZ 128—2016），采用热释光剂量测量系统对从事放射工作的人员进行剂量监测，并对监测结果进行分析评价。结果 2017—2018年松江区共监测620人，人均年剂量当量为0.448 mSv·a^?1，两年集体剂量当量为277.514人·mSv，不同职业类别放射工作人员人均年剂量当量在0.259～1.276 mSv·a^-1，核医学人均年剂量当量高于其他四类（P < 0.05），介入放射学高于放射诊断学、牙科诊断学和放射治疗（P < 0.05）。结论 松江区放射工作人员个人剂量水平远低于国家规定的限值20 mSv·a^?1，工作环境是相对安全的，但仍需提高放射工作人员防护意识加强自身防护。

Analysis of individual dose level of Songjiang radiation workers exposed to external radiation from 2017 to 2018

Objective In order to further provide guidance on occupational safety and protection for radiation workers, we collected the individual dose levels of radiation workers in Songjiang District and evaluated the protection status of radiation workers.Methods Analyzing and evaluating the results of dose monitoring of radiation workers by pyroelectric dosimetry systems according to the Specifications for individual monitoring of occupational external exposure (GBZ 128—2016).Results A total of 620 people were monitored in Songjiang District in 2017—2018, with a per capita annual dose equivalent of 0.448 mSv·a^-1 and a two-year collective dose equivalent of 277.514 people·mSv, with per capita annual dose equivalent of 0.259～1.276 mSv·a^-1 for radiological staff in different occupational categories. Annual dose equivalent per capita in nuclear medicine is higher than in the other four categories (P < 0.05) and in interventional radiology than in diagnostic radiology, diagnostic dentistry and radiotherapy (P < 0.05).Conclusion The personal dose level of radiation workers in Songjiang District is far below the national limit of 20 mSv·a^?1, which means the working environment is relatively safe, however, it is still necessary to raise the awareness of radiation workers to strengthen their own protection.