摘要
采用室内外X-γ剂量率、室内β表面污染水平、样品取样及活度浓度分析等方法对某地需退役的低放辐照工程的辐照室、废物坑、废水池及其周边土壤进行辐射监测。结果表明:室外γ剂量率平均值为118.1 nGy/h,扣除宇宙射线本底后水平正常,属环境本底范围;室内γ剂量率平均值为259.9nGy/h,明显高于室外水平,且高值热点区域呈东北向展布;土壤取样结果呈现出核素在浅层土壤中富集、深层无明显异常的特征;水池中水体^(60)Co高异常为地下水管破裂导致,^(60)Co随水体沉积于池底底泥中。
This paper monitoring radiation level in irradiation chamber,waste pits,waste water tank and the surrounding soil of Low- level radiation engineering by using indoor and outdoor uses X,γ dose rate measurement,Indoor β surface contamination level measurement and sample analysis. The results showed that： Outdoorγ dose rate average value is 118. 1 nGy / h,which is within range of natural radioactive background after deducting the cosmic ray background. Indoor γ dose rate average value is 259. 9 nGy / h,Significantly higher than outdoor levels,and the zone of high value was trend to northeast. Soil sampling results are presented characteristics that nuclides in the shallow soil enrichment but deep no obvious abnormalities.
出处
《核电子学与探测技术》
CAS
北大核心
2016年第1期103-107,共5页
Nuclear Electronics & Detection Technology
关键词
辐照工程
低放
辐射监测
剂量率
irradiation works
Low level radiation
radiation monitoring
dose rate
