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目的 研究金属隔室作业场所微波辐射暴露水平及其防护技术。方法 按GB10 4 36 89测试方法 ,测定药品生产车间改造前用混凝土砖墙和改造后用金属板材料建造的微波隔室作业场所的漏能情况 ,评价其暴露水平及辐射控制效果。结果 作业场所改造前、后距场源 10cm处漏能平均值分别为 6 0 6 .0、10 33.0 μW/cm2 ,距场源 10 0cm处平均值分别为 79.8、5 2 .3μW/cm2 ,距场源 15 0～ 5 0 0cm处平均值分别为9.3、2 0 .5 μW/cm2 。2种不同屏蔽环境作业场所工人作业范围微波辐射暴露水平差异不大 ,漏能衰减与场源距离关系较大。场源屏蔽所采取的技术不完善 ,漏能控制效果不佳。结论 以金属材料封闭隔室的微波作业场所辐射暴露水平及防护控制问题应引起重视。
Objective To study the exposure level of microwave radiation in metal compartment and its protection technology. Methods According to the test method of GB10 4 36 89, the leakage energy of the microwave compartment working place constructed with the concrete brick wall and the metal plate material after the transformation before the transformation of the pharmaceutical production workshop was measured to evaluate the exposure level and the radiation control effect. Results The average leakage energy at the 10 cm away from the field source before and after the site alteration was respectively 6.06 and 1.033.0 μW / cm2. The average values at the 10 cm from the field source were 79.8 and 52.3 W / cm2, respectively Field sources 15 0 ~ 500cm at the average value of 9.3,2 0 .5 μW / cm2. There was no significant difference in the exposure level of workers exposed to microwave radiation in the workplace with two different shielding environments, and the leakage energy attenuation was greatly related to the distance of field sources. Field source shielding technology is not perfect, leakage control can not be achieved. Conclusion The level of exposure to radiation in microwave workplaces with metal materials enclosed compartments and protection control issues should be taken seriously.