L边密度计稳定性监控及U、Pu测量

本文采用金属Zr片作为质控样品监控L边密度计的长期稳定性，在此基础上采用L边密度计测量系列水相U标准溶液和水相Pu标准溶液，绘制水相U工作曲线和水相Pu工作曲线，建立了L边密度计测量U、Pu的分析方法，并采用该工作曲线测量了系列U和Pu标准溶液。结果显示，该方法既可测量水相U、Pu，也可测量有机相U、Pu，对于10 g/L以上的U溶液，测量结果的相对偏差小于5%；对于5 g/L以上的Pu溶液，测量结果的相对偏差小于1.7%。以上结果表明，本文所建立的L边密度计测量U、Pu的方法准确度良好，可用于实际U、Pu的测量。

Stability Monitoring of L-edge Densitometer and Measurement of U and Pu

Metal Zr tablet was used as quality control sample to monitor the long-term stability of L-edge densitometer, on which L-edge densitometer was used to measure the series of U reference solutions and Pu reference solutions in aqueous phase, and the U calibration curve and Pu calibration curve were drawn. The analytical methods for measuring U and Pu were established. The calibration curves were used to measure U and Pu reference solutions. The results show that the methods could measure both U and Pu in aqueous phase and organic phase. For the solution with U concentration above 10 g/L, the relative deviation of measurement results is less than 5%. For the solutions with Pu concentration above 5 g/L, the relative deviation of measurement results is less than 1.7%. It indicates that the method of measuring U and Pu with L-edge densitometer established in this paper has good accuracy and can be used for the measurement of U and Pu in practice.