Development of UO2 thermal diffusivity measurement with laser techniques

The knowledge of the thermal conductivity of nuclear fuel and its evolution as a function of temperature and burn up is a major challenge in the context of the evaluation and understanding of irradiated fuel performances in current reactors. It is also the case for the development and qualification...

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Autores principales:	Doualle Thomas, Le Guillous Vincent, Klosek Vincent, Onofri-Marroncle Claire, Reymond Matthieu, Gallais Laurent, Pontillon Yves
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	uo2 thermal diffusivity measurements laser Physics QC1-999
Acceso en línea:	https://doaj.org/article/88d7f59f9fc1420f970681647e652a02
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id	oai:doaj.org-article:88d7f59f9fc1420f970681647e652a02
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spelling	oai:doaj.org-article:88d7f59f9fc1420f970681647e652a022021-12-02T17:12:46ZDevelopment of UO2 thermal diffusivity measurement with laser techniques2100-014X10.1051/epjconf/202125307005https://doaj.org/article/88d7f59f9fc1420f970681647e652a022021-01-01T00:00:00Zhttps://www.epj-conferences.org/articles/epjconf/pdf/2021/07/epjconf_animma2021_07005.pdfhttps://doaj.org/toc/2100-014XThe knowledge of the thermal conductivity of nuclear fuel and its evolution as a function of temperature and burn up is a major challenge in the context of the evaluation and understanding of irradiated fuel performances in current reactors. It is also the case for the development and qualification of fuel for future reactors. Indeed, numerical simulations of the fuel behaviour under various conditions require the accurate knowledge of thermal conductivity over a wide range of temperature (from ambient to melting point temperature) but also at the scale of few tens of micrometres to take into account the microstructural effects on the thermomechanical evolution of the fuel in normal or incidental irradiation conditions. Different methods, using laser matter interactions, can deduce the thermal conductivity from a thermal diffusivity measurement. In this paper, the potential of two techniques, which present spatial resolution from millimetre to few tens microns, are discussed in the context of the determination of the fuel thermal conductivity: laser flash method and infrared microscopy. Experiments on graphite, as material model, have been conducted and validate these two thermal diffusivity measurement techniques. We present a measurement example for both methods on graphite and then a first experiment carried out with the infrared microscopy technique on UO2.Doualle ThomasLe Guillous VincentKlosek VincentOnofri-Marroncle ClaireReymond MatthieuGallais LaurentPontillon YvesEDP Sciencesarticleuo2thermal diffusivity measurementslaserPhysicsQC1-999ENEPJ Web of Conferences, Vol 253, p 07005 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	uo2 thermal diffusivity measurements laser Physics QC1-999
spellingShingle	uo2 thermal diffusivity measurements laser Physics QC1-999 Doualle Thomas Le Guillous Vincent Klosek Vincent Onofri-Marroncle Claire Reymond Matthieu Gallais Laurent Pontillon Yves Development of UO2 thermal diffusivity measurement with laser techniques
description	The knowledge of the thermal conductivity of nuclear fuel and its evolution as a function of temperature and burn up is a major challenge in the context of the evaluation and understanding of irradiated fuel performances in current reactors. It is also the case for the development and qualification of fuel for future reactors. Indeed, numerical simulations of the fuel behaviour under various conditions require the accurate knowledge of thermal conductivity over a wide range of temperature (from ambient to melting point temperature) but also at the scale of few tens of micrometres to take into account the microstructural effects on the thermomechanical evolution of the fuel in normal or incidental irradiation conditions. Different methods, using laser matter interactions, can deduce the thermal conductivity from a thermal diffusivity measurement. In this paper, the potential of two techniques, which present spatial resolution from millimetre to few tens microns, are discussed in the context of the determination of the fuel thermal conductivity: laser flash method and infrared microscopy. Experiments on graphite, as material model, have been conducted and validate these two thermal diffusivity measurement techniques. We present a measurement example for both methods on graphite and then a first experiment carried out with the infrared microscopy technique on UO2.
format	article
author	Doualle Thomas Le Guillous Vincent Klosek Vincent Onofri-Marroncle Claire Reymond Matthieu Gallais Laurent Pontillon Yves
author_facet	Doualle Thomas Le Guillous Vincent Klosek Vincent Onofri-Marroncle Claire Reymond Matthieu Gallais Laurent Pontillon Yves
author_sort	Doualle Thomas
title	Development of UO2 thermal diffusivity measurement with laser techniques
title_short	Development of UO2 thermal diffusivity measurement with laser techniques
title_full	Development of UO2 thermal diffusivity measurement with laser techniques
title_fullStr	Development of UO2 thermal diffusivity measurement with laser techniques
title_full_unstemmed	Development of UO2 thermal diffusivity measurement with laser techniques
title_sort	development of uo2 thermal diffusivity measurement with laser techniques
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/88d7f59f9fc1420f970681647e652a02
work_keys_str_mv	AT douallethomas developmentofuo2thermaldiffusivitymeasurementwithlasertechniques AT leguillousvincent developmentofuo2thermaldiffusivitymeasurementwithlasertechniques AT klosekvincent developmentofuo2thermaldiffusivitymeasurementwithlasertechniques AT onofrimarroncleclaire developmentofuo2thermaldiffusivitymeasurementwithlasertechniques AT reymondmatthieu developmentofuo2thermaldiffusivitymeasurementwithlasertechniques AT gallaislaurent developmentofuo2thermaldiffusivitymeasurementwithlasertechniques AT pontillonyves developmentofuo2thermaldiffusivitymeasurementwithlasertechniques
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Development of UO2 thermal diffusivity measurement with laser techniques

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