THE RADIOCHEMICAL ANALYSIS METHOD OF Am CONTENT IN HIGH-LEVEL LIQUID WASTE(1AW)

It is suggested to analyse Am content in high-level liquid waste (1AW) using radiochemical method. The chemical separation process is divided into three steps. The first step is to remove Pu and Np from Am using HDEHP extraction. The second one is to separate Am from RE, ~(137)Cs,~(90)Sr using HEHEHP-Levextrel-TTHA-lactic acid complex elution chromatography. Finally, the above Am frac- tion is purified with PMBP-TBP extraction and with HNO_3 stripping to remove TTHA-lactic acid agent and become salt-free solution. After that the detector of ZnS(Ag) is used to measure the α activity of Am. The recovery of Am for the whole process is about 94%, DF_(Pu)=1.7×10~3, DF_(Np)=1.0×10~4, DF_(Eu)=2.7×10~3. This method was used successfully to analyse Am content in high-level liquid waste in reproeessing plant.