A non-destructive determination of uranium in combustible waste

The result of non-destructive determination of uranium content in combustible waste by using Gamma Scanner is presented. The lower detection limit is settled on 0.053 g 235U for each package of waste through a series of tests on scale, background, γ-point source and reference samples. The error of this method is +-36% (with a 95% confidence level) where 235U in waste of each package is up to 1 g and +- 20% (with a 95% confidence level) up to 5 g. This method is proven to be very stable for a long term experience for 3 months with a relative error of 4.9%. The varies-enriched combustible wastes of 235U derived from the production of Qinshan, Daya Bay fuel have been detected by this method