Pore pressure estimation in irradiated UMo

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Pore pressure estimation in irradiated UMo. / Salvato, Daniele; Leenaers, Ann; Van den Berghe, Sven; Detavernier, Christophe.

In: Journal of Nuclear Materials, Vol. 510, 22.08.2018, p. 472-483.

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Salvato, Daniele ; Leenaers, Ann ; Van den Berghe, Sven ; Detavernier, Christophe. / Pore pressure estimation in irradiated UMo. In: Journal of Nuclear Materials. 2018 ; Vol. 510. pp. 472-483.

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@article{6cd65a2d78234534acf7ffc2abd2123c,
title = "Pore pressure estimation in irradiated UMo",
abstract = "Image analysis was performed on SEM micrographs of recently irradiated UMo dispersion fuel plates. Detailed information on the fission gas inter-granular bubbles accompanying recrystallization, including average diameter, density and size distribution were extracted and compared with previous results on UMo and UO2. A pore density drop was notice at high fission densities and attributed mainly to a pore coarsening dominated by irradiation induced phenomena. Based on the image analysis data and theoretical considerations, a model was developed to estimate the pressure inside the pores as a function of fission density, temperature and pore radius. The developed pressure can give indications of the mechanical stability of the fuel towards the progressive building-up of fission gases. Finally, the proposed methodology was applied to the nanobubble lattice decorating the fuel grains at low fission densities in order to infer the physical state of the contained fission gases. The estimated values suggest the presence of solid xenon precipitates.",
keywords = "uranium, molybdenum, recrystallization, fission gas, pressure, nanobubble lattice",
author = "Daniele Salvato and Ann Leenaers and {Van den Berghe}, Sven and Christophe Detavernier",
note = "Score=10",
year = "2018",
month = "8",
day = "22",
doi = "10.1016/j.jnucmat.2018.08.039",
language = "English",
volume = "510",
pages = "472--483",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Pore pressure estimation in irradiated UMo

AU - Salvato, Daniele

AU - Leenaers, Ann

AU - Van den Berghe, Sven

AU - Detavernier, Christophe

N1 - Score=10

PY - 2018/8/22

Y1 - 2018/8/22

N2 - Image analysis was performed on SEM micrographs of recently irradiated UMo dispersion fuel plates. Detailed information on the fission gas inter-granular bubbles accompanying recrystallization, including average diameter, density and size distribution were extracted and compared with previous results on UMo and UO2. A pore density drop was notice at high fission densities and attributed mainly to a pore coarsening dominated by irradiation induced phenomena. Based on the image analysis data and theoretical considerations, a model was developed to estimate the pressure inside the pores as a function of fission density, temperature and pore radius. The developed pressure can give indications of the mechanical stability of the fuel towards the progressive building-up of fission gases. Finally, the proposed methodology was applied to the nanobubble lattice decorating the fuel grains at low fission densities in order to infer the physical state of the contained fission gases. The estimated values suggest the presence of solid xenon precipitates.

AB - Image analysis was performed on SEM micrographs of recently irradiated UMo dispersion fuel plates. Detailed information on the fission gas inter-granular bubbles accompanying recrystallization, including average diameter, density and size distribution were extracted and compared with previous results on UMo and UO2. A pore density drop was notice at high fission densities and attributed mainly to a pore coarsening dominated by irradiation induced phenomena. Based on the image analysis data and theoretical considerations, a model was developed to estimate the pressure inside the pores as a function of fission density, temperature and pore radius. The developed pressure can give indications of the mechanical stability of the fuel towards the progressive building-up of fission gases. Finally, the proposed methodology was applied to the nanobubble lattice decorating the fuel grains at low fission densities in order to infer the physical state of the contained fission gases. The estimated values suggest the presence of solid xenon precipitates.

KW - uranium

KW - molybdenum

KW - recrystallization

KW - fission gas

KW - pressure

KW - nanobubble lattice

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/31325886

U2 - 10.1016/j.jnucmat.2018.08.039

DO - 10.1016/j.jnucmat.2018.08.039

M3 - Article

VL - 510

SP - 472

EP - 483

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

ER -

ID: 4632473