某选冶厂密封源装置辐射防护水平调查

Investigation on Radiation Protection Level of The Sealed Source Device in An Enterprise

目的了解某选冶厂对密封源装置的辐射水平的防护效果。方法依据《电离辐射防护与辐射源安全基本标准》等相关标准,检测在储源闸关闭和开启时,距源容器表面5、100 cm及周边环境处辐射水平并进行辐射防护评价。结果在源容器源闸关闭时,距源容器表面5、100 cm处辐射水平为0.22～7.71μSv/h;密封源在工作状态下工作场所和相邻环境为0.27～0.56μSv/h。结论该选冶厂密封源装置符合国家放射卫生防护标准,放射工作人员受照剂量低于国家标准。

[Objective]To understand the protective effect of sealed source device against radiation in an enterprise.[Methods]According to related standards,such as ＂Basic Standard for Protection against Ionizing Radiation and Safety of Radiation Sources＂,the radiation levels of the places 5,100 cm away from the source vessel surface were examined,as well as the surrounding environment.The assessment of radiation protection was also performed.[Results]When vessel source floodgate was closed,the radiation level at the places apart from source vessel surface 5,100 cm was 0.22～7.71 μSv/h.The radiation level of working place and its surrounding environment was 0.27～0.56μSv/h when vessel source was in working status.[Conclusion]The sealed source device of enterprise conforms with the national radiation protection standards.The radiation exposure dosage of the workers is lower than the national standard.