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Communication Dans Un Congrès Année : 2017

Detailed MCNP simulations of gamma-ray spectroscopy measurements with calibration blocks for uranium mining applications

Résumé

AREVA Mines and the Nuclear Measurement Laboratory of CEA Cadarache are collaborating to improve the sensitivity and precision of uranium concentration evaluation by means of gamma measurements. This paper reports gamma-ray spectra, recorded with a high-purity coaxial germanium detector, on standard cement blocks with increasing uranium content, and the corresponding MCNP simulations. The detailed MCNP model of the detector and experimental setup has been validated by calculation vs. experiment comparisons. An optimization of the detector MCNP model is presented in this paper, as well as a comparison of different nuclear data libraries to explain missing or exceeding peaks in the simulation. Energy shifts observed between the fluorescence X-rays produced by MCNP and atomic data are also investigated. The qualified numerical model will be used in further studies to develop new gamma spectroscopy approaches aiming at reducing acquisition times, especially for ore samples with low uranium content.
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Dates et versions

hal-02433900 , version 1 (09-01-2020)

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  • HAL Id : hal-02433900 , version 1

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Th. Marchais, B. Pérot, C. Carasco, P-G. Allinei, P. Chaussonnet, et al.. Detailed MCNP simulations of gamma-ray spectroscopy measurements with calibration blocks for uranium mining applications. ANIMMA 2017, Jun 2017, Liege, Belgium. ⟨hal-02433900⟩

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