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目的优化热室环境,降低职业照射剂量。方法从热室工作环境暴露出来的问题着手,对其存在的辐射隐患进行改进,规范操作流程。结果经过对废液排泄管线的改造,分装室的活度由最高时的66.7×108Bq(18mCi)降至3.7×106Bq～1.11×107Bq(0.10～0.30mCi)左右;经过对通风管道的改造,净化间的剂量率由最高时的70μSv/h降至0.15～0.40μSv/hr之间;对排气排液管线的合理处置,使合成系统的清洗干燥及FDG产品的质量数量得到保证。结论随着工作环境中放射性活度的降低,工作人员接受职业照射剂量下降,身体健康得到保障,从而为FDG的顺利合成提供了安全可靠的操作环境。
Objective To optimize the hot room environment and reduce the occupational exposure dose. Methods Starting from the problems exposed in the working environment of hot cells, the existing radiation risks are improved and the operation flow is regulated. Results After the reformation of the waste liquid discharge pipeline, the activity of the sub-chamber decreased from 66.7 × 108Bq (18mCi) to 3.7 × 106Bq ~ 1.11 × 107Bq (0.10 ~ 0.30mCi) at the highest level. After the renovation of the ventilation pipe, The decontamination dose rate is reduced from the highest 70μSv / h to 0.15 ~ 0.40μSv / hr. The rational disposal of the exhaust gas drainage line ensures the cleaning and drying of the synthesis system and the quality of FDG products. Conclusion With the decrease of radioactive activity in the work environment, the workers receive a dose reduction of occupational exposure and their physical health is protected, thus providing a safe and reliable operating environment for the smooth synthesis of FDG.