高放废液处理过程中总β放射性活度的分析
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摘要: 研究了高放废液处理过程中总β放射性活度的分析方法。用液体闪烁计数法甄别α和γ射线的干扰，测量水相和有机相总β放射性的计数率。把β放射性核素分成４组，用液闪仪和Ｇｅ（Ｌｉ）γ谱仪分析各组样品和各种淬灭条件下的等效效率和权重因子，通过效率等效法计算得到样品的总β放射性活度。分析了ＴＲＰＯ处理生产堆高放废液流程中各液流的总β放射性活度。总β测量的不确定度小于５％。Abstract: ANALYSIS OF GROSS BETA ACTIVITY IN THE TRPO PROCESSLiang Junfu Liu Xiuqin Guo Yifei(Institute of Nuclear Energy Technology,Tsinghua University, P.O.Box 1021,Beijing 102201)ABSTRACTAnalysis of gross beta activity in the TRPO process for treating high level liquid waste is studied.The gross beta activity in aqueous or organic phase samples are determined by liquid scintillation analyzer.Interference with determination of α and γ to β is discriminated.β nuclides are divided into four groups based on β maximum energy.Equivalent efficiency and weigh factor of each group are analyzed by liquid scintillation analyzer and Ge(Li) γ spectrometer.Gross β activities of the samples are calculated by equivalent efficiency method.The method is applied to analysis of gross β activity in the TRPO process with satisfactory results.Key words Gross beta activity Liquid scintillation counting High level liquid waste Equivalent efficiency method
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