Analyse the Feasibility of Distinguish EU and Depleted Uranium by Activation Method

First,introduce Russian scholars using activation method to measure fission material's delayed gamma-ray to determinate the attribution of uranium material.Their experiments indicate that,irradiating UO2 powder by 252Cf can be used to detect fission product from EU material—especially 138Cs is obvious.And observe the gamma spectrums,which were obtained in our experiments of irradiating U3O8 powder in reactor.Then establish a simple model of 252Cf neutron source irradiating a metal uranium hollow sphere,using MCNP and Labsocs to assess,and investigate the feasibility of detecting the uranium component's by activation method to judge whether it is HEU.This method is feasible.Compare this method and passive method,activation measurement has an advantage—it can judge the EU stuff yield from the fuel pre-irradiated in reactor and the stuff yield from the fuel irradiated in reactor,but passive method can only judge the EU stuff yield from irradiated fuel.

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