Thermal conductivity of UO2+x and U4O9-y

被引：51

作者：

White, J. T. ^{[1
]}

Nelson, A. T. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

JOURNAL OF NUCLEAR MATERIALS | 2013年 / 443卷 / 1-3期

关键词：

ELECTRICAL-CONDUCTIVITY; FUEL; OXIDATION; TEMPERATURE; HEAT; SCATTERING; URANIA; STEAM; MODEL;

D O I：

10.1016/j.jnucmat.2013.07.063

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Stoichiometries of UO2 specimens ranging from 2.000 to 2.210 were prepared in situ at 1673 K within thermoanalytical equipment. Thermal conductivities were analyzed according to Klemens-Callaway defect model. Analysis of the data sets allows for extraction of the fundamental phonon-phonon and phonon-defect scattering contributions for the materials investigated. Low temperature thermal conductivity data was modeled using sigmoidal averaging to calculate the dual phase field UO2+x-U4O9-y. This allowed the thermal conductivity of U4O9-y to be calculated as a function of temperature up to 873 K. This fundamental dataset provides a key contribution to ongoing efforts in the modeling and simulation communities in the areas of both light water reactor fuel performance and accident evolution. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：342 / 350

页数：9

共 38 条

[1] HIGH-TEMPERATURE OXIDATION OF UO2 IN STEAM-HYDROGEN MIXTURES [J].