METHOD FOR EVALUATING THE MASS URANIUM CONCENTRATION OF A SAMPLE BY GAMMA SPECTROMETRY AND ASSOCIATED DEVICE

摘要

The invention relates to a method for evaluating the mass concentration of uranium in a sample of uranium material by gamma spectrometry, comprising the following steps: a) acquiring (200) an energy spectrum of gamma radiation of the sample at using a scintillator detector, the energy spectrum (100) comprising at least a first energy band (110) between 87 keV and 110 keV, and a second energy band (120) between 560 keV and 660 keV, the second energy band comprising at least one energy line (130) to 609 keV of the 214Bi, b) calculation (210) of an initial mass uranium concentration (CmU0) using the energy spectrum, c) measure (220) of a parameter representative of the height of the sample and of a parameter representative of the density of the sample, d) calculation (230) of a corrective coefficient (K), e) calculation (240) a corrected mass uranium concentration (Cmu) using the mass concentration i uranium level (CmU0) and the corrective coefficient (K).