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Quantification gamma des radionucléides par modélisation équivalente

Abstract : This thesis deals with radiation measurement. More particularly it concerns gamma ray spectroscopy for low level wastes. It consists in modeling the full efficiency calibration coefficient of the measured scene. It is essential to quantify the activity/mass of the measured object. This thesis is split in two parts. The first part consists in HPGE detector characterization. The HPGe characterization is available in space and energy range. The second part consists in determining the full efficiency calibration coefficient of the measured scene without operator hypothesis. First work is the development of an automated methodology to obtain detector characterization. HPGe detector characterization has similar performance to the real detector with a control of the discrepancy between them. HPGe detector characterization is achieved without expert, on field condition with a convergence criterion lower than 5%. Second work is a feasibility study for activity quantification of complex waste package without operator hypothesis. It will be possible by using metamodeling. Metamodeling generate quickly a set of configurations of the calibration coefficient with regard to input data. Configurations are sorted out according some criterions.
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Submitted on : Tuesday, February 16, 2016 - 3:02:05 PM
Last modification on : Thursday, January 11, 2018 - 6:14:06 AM
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  • HAL Id : tel-01247249, version 1


Nicolas Guillot. Quantification gamma des radionucléides par modélisation équivalente. Autre [cond-mat.other]. Université Blaise Pascal - Clermont-Ferrand II, 2015. Français. ⟨NNT : 2015CLF22557⟩. ⟨tel-01247249⟩



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