Imperial College London
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ProfessorRobinGrimes

Faculty of Engineering, Department of Materials

BCH Steele Chair in Energy Materials
 
 
 
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Contact

 

+44 (0)20 7594 6730r.grimes

 
 
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Location

 

B303cBessemer BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Qin:2020:10.1016/j.jnucmat.2020.152258,
author = {Qin, MJ and Middleburgh, SC and Cooper, MWD and Rushton, MJD and Puide, M and Kuo, EY and Grimes, RW and Lumpkin, GR},
doi = {10.1016/j.jnucmat.2020.152258},
journal = {Journal of Nuclear Materials},
title = {Thermal conductivity variation in uranium dioxide with gadolinia additions},
url = {http://dx.doi.org/10.1016/j.jnucmat.2020.152258},
volume = {540},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - By combining experimental observations on Gd doped fuel with a theoretical understanding, the variation in thermal conductivity with Gd concentration and accommodation mechanism has been modelled. Four types of Gd accommodation mechanisms have been studied. In UO2−x, isolated substitutional Gd3+ ions are compensated by oxygen vacancies and [equation] defect clusters. In UO2, isolated substitutional Gd3+ ions are compensated by U5+ ions and [equation] defect clusters. The results indicate that defect clusters can be considered as less effective phonon scatterers and therefore result in less thermal conductivity degradation. The thermal conductivity predicted for UO2 with [equation] defect clusters is in good agreement with experimental data for UO2 with 5 wt% Gd2O3. This supports the previous theoretical results that Gd is accommodated through [equation]  defect clusters in UO2 in the presence of excess oxygen
AU  - Qin,MJ
AU  - Middleburgh,SC
AU  - Cooper,MWD
AU  - Rushton,MJD
AU  - Puide,M
AU  - Kuo,EY
AU  - Grimes,RW
AU  - Lumpkin,GR
DO  - 10.1016/j.jnucmat.2020.152258
PY  - 2020///
SN  - 0022-3115
TI  - Thermal conductivity variation in uranium dioxide with gadolinia additions
T2  - Journal of Nuclear Materials
UR  - http://dx.doi.org/10.1016/j.jnucmat.2020.152258
UR  - https://www.sciencedirect.com/science/article/pii/S0022311519308797?via%3Dihub
UR  - http://hdl.handle.net/10044/1/81268
VL  - 540
ER  -
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