天津市某石化企业50台含密封源仪表放射防护检测结果

Radiation protection detection results of 50 instruments with sealed source in a petrochemical enterprise of Tianjin

目的了解天津市某石化企业含密封源仪表装置场所放射防护现状。方法按照国家标准对含密封源仪表的放射防护要求,使用便携式X、γ剂量率仪对含密封源装置周围辐射剂量水平进行测量。结果 50台含密封源仪表周围剂量当量率均满足国家标准要求。距源容器和探测器外表面5 cm处的最大剂量率值分别为11.54、5.87μSv/h,距源容器和探测器外表面100 cm处的最大剂量率值分别为1.17、3.68μSv/h。结论在正常工作状态下,企业含密封源仪表装置符合相关国家标准的规定,所产生的辐射污染基本不会影响到工作人员的身体健康。

[Objective] To understand the status of radiation protection in the place with sealed source instrumentation in a petrochemical enterprise of Tianjin. [Methods] According to national standards to the radiation protection requirement of the sealed source instrument,the radiation dose level around the sealed source device was measured by using portable X and γ dose rate meter.[Results] The dose equivalent rates around the 50 sealed source instruments met the national standard. The maximum dose rate of 5 cm from the outer surface of the source container and detector was 11.54 and 5.87 μSv/h respectively,and the maximum dose rate of 100 cm from the outer surface of the source container and detector was 1.17 and 3.68 μSv/h respectively.[Conclusion] Under normal working conditions,the sealed source device in this enterprise conforms to the relevant national standards,and the resulting radiation pollution will not affect the health of the staff.