In-pile Xe diffusion coefficient in UO2 determined from the modeling of intragranular bubble growth and destruction under irradiation

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In-pile Xe diffusion coefficient in UO2 determined from the modeling of intragranular bubble growth and destruction under irradiation. / Govers, Kevin; Lemehov, Sergei; Verwerft, Marc.

In: Journal of Nuclear Materials, Vol. 374, No. 3, 15.03.2008, p. 461-472.

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@article{708ef5d3c9594f30b4d969a1c3e39ad5,
title = "In-pile Xe diffusion coefficient in UO2 determined from the modeling of intragranular bubble growth and destruction under irradiation",
abstract = "Intragranular bubbles grow in the nuclear fuel by diffusion and precipitation of fission gases, mainly xenon; and are ultimately destroyed, under irradiation, by fission fragments. This article will attempt to determine the in-pile bubble distributions taking into account the evolution of the concentration profile around a bubble during its growth and the destruction process by fission fragments. From these distributions a relation between the bubble mean radius and the diffusion coefficient of xenon can be established, allowing the determination, from experimental measurements of intragranular bubble sizes, of the in-pile Xe diffusion coefficient in UO2. The estimated activation energy (0.9 eV) is about one order of magnitude lower than the widely used value of 3.9 eV determined from out-of-pile experiments. This effect can be attributed to the presence of point defects created by the irradiation.",
keywords = "uranium dioxide xenon UO2 Xe diffusion coefficient in pile defects",
author = "Kevin Govers and Sergei Lemehov and Marc Verwerft",
note = "Score = 10",
year = "2008",
month = mar,
day = "15",
doi = "10.1016/j.jnucmat.2007.10.005",
language = "English",
volume = "374",
pages = "461--472",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",
number = "3",

}

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TY - JOUR

T1 - In-pile Xe diffusion coefficient in UO2 determined from the modeling of intragranular bubble growth and destruction under irradiation

AU - Govers, Kevin

AU - Lemehov, Sergei

AU - Verwerft, Marc

N1 - Score = 10

PY - 2008/3/15

Y1 - 2008/3/15

N2 - Intragranular bubbles grow in the nuclear fuel by diffusion and precipitation of fission gases, mainly xenon; and are ultimately destroyed, under irradiation, by fission fragments. This article will attempt to determine the in-pile bubble distributions taking into account the evolution of the concentration profile around a bubble during its growth and the destruction process by fission fragments. From these distributions a relation between the bubble mean radius and the diffusion coefficient of xenon can be established, allowing the determination, from experimental measurements of intragranular bubble sizes, of the in-pile Xe diffusion coefficient in UO2. The estimated activation energy (0.9 eV) is about one order of magnitude lower than the widely used value of 3.9 eV determined from out-of-pile experiments. This effect can be attributed to the presence of point defects created by the irradiation.

AB - Intragranular bubbles grow in the nuclear fuel by diffusion and precipitation of fission gases, mainly xenon; and are ultimately destroyed, under irradiation, by fission fragments. This article will attempt to determine the in-pile bubble distributions taking into account the evolution of the concentration profile around a bubble during its growth and the destruction process by fission fragments. From these distributions a relation between the bubble mean radius and the diffusion coefficient of xenon can be established, allowing the determination, from experimental measurements of intragranular bubble sizes, of the in-pile Xe diffusion coefficient in UO2. The estimated activation energy (0.9 eV) is about one order of magnitude lower than the widely used value of 3.9 eV determined from out-of-pile experiments. This effect can be attributed to the presence of point defects created by the irradiation.

KW - uranium dioxide xenon UO2 Xe diffusion coefficient in pile defects

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_86934

UR - http://knowledgecentre.sckcen.be/so2/bibref/4853

U2 - 10.1016/j.jnucmat.2007.10.005

DO - 10.1016/j.jnucmat.2007.10.005

M3 - Article

VL - 374

SP - 461

EP - 472

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - 3

ER -

ID: 97358