塑料薄膜覆盖探测窗对表面污染检测的影响  

The influence of the detection window wrapped with plastic film on the surface contamination detection

作　　者：陈忠民 胡红芳 李伟 东肃河 于慧杰 王思念 吕小立 邓致荣 CHEN Zhongmin;HU Hongfang;LI Wei;DONG Suhe;YU Huijie;WANG Sinian;LV Xiaoli;DENG Zhirong(Rocket Force Characteristic Medical Center,Beijing 100088 China)

机构地区：[1]火箭军特色医学中心核辐射损伤与监测研究室,北京100088

出　　处：《中国辐射卫生》2020年第6期625-627,共3页Chinese Journal of Radiological Health

基　　金：军队后勤科研项目(18QNP032);中心科研创新项目。

摘　　要：目的研究塑料薄膜包裹表面污染检测仪探测窗对表面污染检测的影响。方法选取RDa150型、Como170型两款表面污染检测仪分别在无膜、单层膜、双层膜覆盖设备观察窗的条件下测量镅-241源α表面污染水平。结果无膜条件下,RDa150型表面污染检测仪5次测量结果平均为228.01 Bq/cm2,Como170型表面污染检测仪平均为231.05 Bq/cm2;单层膜覆盖条件下,RDa150型表面污染检测仪5次测量结果平均为96.34 Bq/cm2,Como170型表面污染检测仪平均为100.31 Bq/cm2,下降约一半;双层膜覆盖条件下,RDa150型表面污染检测仪5次测量结果平均为0.45 Bq/cm2,Como170型表面污染检测仪平均为0.65 Bq/cm2。结论表面污染水平较高时,可用单层塑料薄膜覆盖设备探测窗,降低设备被污染风险;去污完毕或表面污染水平较低检测时,不能用塑料薄膜包裹设备探测窗。Objective To study the influence of the detection window of the surface contamination detector wrapped with plastic film on the surface contamination detection. Methods RDA150 and Como170 type surface contamination detectors were selected to measure the surface α-ray contamination level of Americium-241 source under the condition of no film,single-layer film and double-layer film covering the observation window of the equipment, respectively. Results Under the condition of no film, the average measurement result of RDa150 surface contamination detector’s 5 measurements was 228.01 Bq/cm^2, and that of Como170 type surface contamination detector was 231.05 Bq/cm^2;Under the condition of singlelayer film covering, the average measurement results of RDa150 type surface contamination detector’s 5 measurements was 96.34 Bq/cm^2, and the Como170 surface contamination detector were 100.31 Bq/cm^2 which decreased by about half.Under the condition of double-film coverage, the average measurement results of RDa150 type surface contamination detector’s 5 measurements were 0.45 Bq/cm^2, and the Como170 type surface contamination detector were 0.65 Bq/cm^2.Conclusion When the surface contamination level is high, a single layer of plastic film can be used to cover the equipment detection window to reduce the risk of equipment contamination. When the decontamination is completed or the level of surface contamination is low, the equipment detection window cannot be wrapped with plastic film.

关 键 词：塑料薄膜 表面污染检测 Α射线 表面污染检测仪 

分 类 号：X591[环境科学与工程—环境工程]