Traceability Improvement of High Temperature Thermal Property Measurements of Materials for New Fission Reactors

Hay, Bruno; Anhalt, K.; Chapman, L.; Boboridis, K.; Hameury, Jacques; Krenek, Stephan; Vlahovic, L.; Fleurence, Nolwenn; Beneš, O.

doi:10.1109/tns.2014.2300552

Cited by 12 publications

(5 citation statements)

References 25 publications

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“…One of the available data source for POCO EDM-3 graphite reports the following equation between We have reported in Figure 5 the spectral emissivity values of porous graphites, with properties close to EDM-3, around 1 µm (laser used in our experiments) [18,[24][25][26], 1.5 µm (pyrometers used in our experiments) [18,26,27] and 0.65 µm [28,29] (different datasets available at this wavelength). It is difficult to identify clear trends in the temperature dependence except that the emissivity at 1-1.5 µm is higher than the total emissivity (in the range 0.85-0.95).…”

Section: B-optical Properties Of Edm-3mentioning

confidence: 90%

High power continuous wave laser heating of graphite in a high temperature range up to 3800 K

Gallais

Thibault

Lescoute

et al. 2021

Journal of Applied Physics

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As graphite is an important material for several applications, the evaluation of its properties at very high temperature is of major importance. Conducting studies at temperature > 2800K is however very challenging and the amount of available data in the literature is therefore very limited. This paper presents a methodology that compares experimental data to simulation results following a progressive increase of the temperature range investigated. The study was conducted on a commercial polycrystalline graphite produced by sintering (EDM3 from POCO) under high power continuous laser heating (kW Ytterbium at a wavelength of 1080 nm). Experiments were done inside a vacuum chamber equipped with pyrometers and cameras allowing fine monitoring of the temperature of the samples. A 3D numerical model has been developed based on the Finite Element Method to analyse the experimental results. The evolution of thermal and optical properties of EDM3 with temperature are required for modelling correctly the laser / material Interaction. By running sequential comparison of calculation with dedicated experiment we achieve better knowledge of such properties. From this study we obtain estimations of the evolution of thermal conductivity, emissivity and evaporation rate up to 3800 K of amorphous graphite.

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Section: B-optical Properties Of Edm-3mentioning

confidence: 90%

High power continuous wave laser heating of graphite in a high temperature range up to 3800 K

Gallais

Thibault

Lescoute

et al. 2021

Journal of Applied Physics

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“…Again in the framework of METROFISSION and in order to provide reference methods for the measurement of the thermal properties of materials at high temperatures, in particular materials to be developed for advanced nuclear reactors, three National Metrology Institutions (LNE, PTB and NPL) and JRC/ITU have collaborated in designing new measuring equipment [121]: -a thermal diffusivimeter based on the laser-flash method operating at temperatures up to 2000°C; -an equipment for the determination of the spectral emissivity of solid materials up to 1500°C, based on the measurement of the energy deposited by a laser pulse on a face of the cylindrical sample; -an equipment to measure the linear thermal expansion up to 2000°C with horizontally operating differential push rod dilatometers; -calorimeters to determine the specific heat up to 1500°C.…”

Section: Measuring Thermophysical Properties Of Materials At High Temmentioning

confidence: 99%

Nuclear instrumentation and measurement: a review based on the ANIMMA conferences

Giot

Vermeeren

Lyoussi

et al. 2017

EPJ Nuclear Sci. Technol.

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Abstract. The ANIMMA conferences offer a unique opportunity to discover research carried out in all fields of nuclear measurements and instrumentation with applications extending from fundamental physics to fission and fusion reactors, medical imaging, environmental protection and homeland security. After four successful editions of the Conference, it was decided to prepare a review based to a large extent but not exclusively on the papers presented during the first four editions of the conference. This review is organized according to the measurement methodologies: neutronic, photonic, thermal, acoustic and optical measurements, as well as medical imaging and specific challenges linked to data acquisition and electronic hardening. The paper describes the main challenges justifying research in these different areas, and summarizes the recent progress reported. It offers researchers and engineers a way to quickly and efficiently access knowledge in highly specialized areas.

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“…More information about the equipment developed in the framework of this project by PTB and LNE can be found in [18] and [19]. These apparatuses have been validated in their operating temperature ranges by measuring emissivity and thermal diffusivity of two homogeneous materials (tungsten and graphite) [20]. Thermal diffusivity measurements were also performed on these materials by EC-JRC-ITU (Institute for Transuranium Elements) with two homemade facilities as well as by NPL and PTB with commercial equipment.…”

Section: Thermophysical Properties Of Advanced Materialsmentioning

confidence: 99%

Metrology for New Generation Nuclear Power Plants–MetroFission

Johansson

Filtz

DeFelice

et al. 2014

IEEE Trans. Nucl. Sci.

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This EMRP (European Metrology Research Programme) project, MetroFission, has been looking at solving metrological problems related to a new generation of nuclear power plants. The proposed Generation IV power plants are designed to run safely, make efficient use of natural resources, minimize the waste and maintain proliferation resistance. In order to reach these goals, the reactor operation involves higher temperatures, high-energy neutron fluence, different types of fuel where the minor actinides are included etc. In this overview of the multidisciplinary project, which has 12 partners in 10 countries, the work described has focused on improved temperature measurements, investigation of thermal properties of advanced materials, determination of new and relevant nuclear data and development of measurement techniques for radionuclides suitable for Generation IV power plants.

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Traceability Improvement of High Temperature Thermal Property Measurements of Materials for New Fission Reactors

Cited by 12 publications

References 25 publications

High power continuous wave laser heating of graphite in a high temperature range up to 3800 K

High power continuous wave laser heating of graphite in a high temperature range up to 3800 K

Nuclear instrumentation and measurement: a review based on the ANIMMA conferences

Metrology for New Generation Nuclear Power Plants–MetroFission

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