混合式K边界技术及其应用的实验室研究(Ⅰ)

LABORATORY STUDIES OF HYBRID K EDGE TECHNOLOGY AND APPLICATION(Ⅰ)

描述了１台用于乏燃料后处理厂首端溶解液中铀、钚浓度同时直接测量的混合式Ｋ边界／Ｘ荧光装置的研制和实验结果，包括装置调试、软件开发、系统刻度、精度试验以及对标准铀溶液样品的分析。系统对铀浓度在１００—３５０ｇ／Ｌ范围内Ｋ边界刻度系数的平均值Δμ＝（３．３１７６±０．００１０）ｃｍ２／ｇ，对ρ（Ｕ）＞１００ｇ／Ｌ样品的分析精度在０．２２％—０．４０％之间。用该装置对Ｕ３Ｏ８标准样品的分析结果与化学测量值间的相对偏差好于０．１０％。

The paper describes the experiment results of a hybrid K edge/XRF densitometer developed for the simultaneous and direct measurement of uranium and plutonium concentration in the feed solutions in reprocessing plant, including the set up of the device, adjustment, software, calibration, accuracy test and analysis of samples. For the uranium concentration range from 100 to 350 g/L the Δ μ , the mean value of graduated coefficient, is (3 3176±0 0010) cm 2/g. For the uranium concentration above 100 g/L the accuracy of 0 22 % to 0 40 % is obtained and the difference between measured and chemical analysis results for standard samples of U 3O 8 is less than 0 10 %.