【作者】 李烨； 孙宇； 王萍； 李涛文； 张东； 赵丹； 谭昭怡；

【Author】 LI Yi;SUN Yu;ZHANG Dong;WANG Ping;LI Taowen;ZHAO Dan;TAN-Zhaoyi;Institute of Nuclear Physics & Chemistry of CAEP;

【机构】 四川省绵阳市中国工程物理研究院核物理与化学研究所；

【摘要】 开展了干冰喷射去除β污染铅罐表面放射性污染实验,结果表明,干冰喷射去污技术可有效去除污染铅罐外表面(带有油漆涂层)的放射性污染,使其达到清洁解控水平;对于内壁比较光滑、开口直径较大、β核素松散污染的蓝色手提铅罐,其污染水平大于2Bq/cm2的铅罐内壁去污效率大于90%,清洁解控率为83.3%;对于内壁比较粗糙、开口尺寸较小、多为β核素固定性污染的蓝色手提双耳环铅罐内壁去污效率大于70%,清洁解控率为33%;干冰去污过程中产生的β气溶胶净化效率可达99%以上。气溶胶粒径主要分布在第一、第二和第五级。其中第一和第二级气溶胶占所取气溶胶总量的50%以上。更多还原

【Abstract】 Dry ice jet was used to decontaminate the polluted lead flaskS;The results identified the surface polluted level of lead flasks was under control level through decontamination technique.The decontamination effective was 90%more for smooth lead flasks incompat-contaminated by B and uncontrollable effective was 83.3%while the decontamination effective was 70%more for smooth lead flasks compat-contaminated by B and uncontrollable effective was 33%.And the purgative effective was more than99%for B aerosol.Aerosol particle sizes were distributed in the first grade,the second grade and the fifth grade.And the particle sizes were mainly distributed in the first grade and the second grade,suming up to 50%.更多还原