Orano Mining

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Ai4r

Areva Mines

Hervé Toubon

Bertrand Perot

Jean-Luc Ma

Thomas Marchais

Samuel Duval

Michael Descostes

Cédric Carasco

Hugo Lefeuvre

Romain Goupillou

Jérôme Donnard

Tugdual Oger

Ludovic Bourva

A method for assessing the mass concentration of uranium in a sample of uranium-bearing material by gamma spectrometry, includes a) acquiring () an energy spectrum of gamma radiation from the sample using a scintillator detector, the energy spectrum () comprising at least a first energy band () between 87 keV and 110 keV, and a second energy band () between 560 keV and 660 keV, the second energy band comprising at least one energy line () at 609 keV fromBi, b) calculating () an initial mass concentration of uranium (Cm) using the energy spectrum, c) measuring () a parameter representative of the height of the sample and a parameter representative of the density of the sample, d) calculating () a corrective coefficient (K), and e) calculating () a corrected mass concentration of uranium (Cm) using the initial mass concentration of uranium (Cm) and the corrective coefficient (K).

Method for assessing the concentration of uranium in a sample by gamma spectrometry, and associated device

A method is for analyzing, using a detector of alpha particles, a sample comprising at least one radionuclide emitter of a plurality of alpha particles. The detector comprises a detection medium and a plurality of measurement cells suitable for measuring at least one incident signal generated by an interaction of the alpha particle with said detection medium. The detector is designed to provide an autoradiographic image of said sample. The method comprises a step for determining (E1) an initial energy of each alpha particle. The step comprises repeating three sub-steps: determining (D1) a position of a first interaction of an alpha particle with the detection medium, determining (D2) an energy deposited by the particle in the interior of the detector and determining (D3) the initial energy of the alpha particle. The method then comprises constructing an energy spectrum for one zone of the autoradiographic image.

Analyzing method using a detector of alpha particles

Growing community of inventors

Les Essarts-le-Roi, France

Hervé Toubon