Experiment and numerical simulation of thermal conductivity of uranium dioxide

doi:10.7523/j.issn.2095-6134.2009.3.017

Abstract

Abstract:

Uranium dioxide is a kind of steady nuclear fuel that has the characteristic of high melting point and steady property. The thermal conductivity of uranium dioxide can directly influence the temperature distribution of nuclear fuel and the max temperature of the center of nuclear fuel. The experimental results and expression of thermal conductivity have been compared in the paper. The deviation between the experiment results has decreased. The non-equilibrium molecular dynamics simulation results are in good agreement with the experiment results in medium temperature region. In low temperature region, it is necessary to add the quantum correction to the kinetic energy computation of phonon. In high temperature region, it is needed to use the accurate potential model and build up the electron gas energy transport model and photon radiation energy transport to study the thermal conductivity well and truly for the nuclear reactor safety design and uranium dioxide engineering application.

Key words: uranium dioxide, thermal conductivity, molecular dynamics

CLC Number:

TK121

WANG Zeng-Hui, HUANG Xiao-Feng. Experiment and numerical simulation of thermal conductivity of uranium dioxide[J]. , 2009, 26(3): 415-418.

References

[1] Harding JH, Martin DG, Potter PE. Thermophysical and thermochemical properties of fast reactor materials. Commission of European Communities Report EUR 12402.1989

[2] Lucuta PG, Matzke HJ. Hastigns IJ. A pragmatic approach to modeling thermal conductivity of irradiated UO2 fuel: review and recommendations. J Nucl Mater, 1996,232:166~180

[3] Lucuta PG, et al. Thermal conductivity of SIMFUEL. Journal of Nuclear Materials, 1992,188:198~204

[4] Wiesenack W. Assessment of UO2 conductivity degradation based on in-pile temperature data.In:Proc International Topical Meeting on Light Water Reactor Fuel Performance. Portland, Oregon, 1997,3:2~6

[5] Ronchi C, Sheindlin M, Musella M, et al. Thermal conductivity of uranium dioxide up to 2900 K from simultaneous measurement of heat capacity and thermal diffusivity. Journal of Applied Physics, 1999,85(2):776~789

[6] Fink JK.Thermophysical properties of uranium dioxide. Journal of Nuclear Materials,2000,279:1~18

[7] Watanabe T, Sinnott SB, Tulenko JS, et al. Thermal transport properties of uranium dioxide by molecular dynamics simulations. Journal of Nuclear Materials,2008,375:388~396

[8] Jean-Paul Crocombette, Dominique Ghaleb. Molecular dynamics modeling of irradiation damage in pure and uranium-doped zircon. Journal of Nuclear Materials, 2001,295:167~178

[9] Chandra Bhanu Basak. Classical molecular dynamics simulation of uranium monocarbide UC. Computational Materials Science, 2007,40:562~568

[10] Higuchi S. Proc of fall meeting of the atomic energy society of Japan. Okinawa, Published by Atomic Energy Society of Japan, 1997,697: 14~17

[11] Kazuhiro Yamada, Ken Kurosaki, Msayoshi Uno, et al. Evaluation of thermal properties of uranium dioxide by molecular dynamics. Journal of Alloys and Compounds, 2000,307:10~16

[12] Terentyev D. Molecular dynamics study of oxygen transport and thermal properties of mixed oxide fuels. Computational Materials Science,2007,40:319~326

[13] Wang ZH, Li ZX. Lattice dynamics analysis of thermal conductivity in silicon nanoscale film. Applied Thermal Engineering, 2006,26(17-18):2063~2066

[14] Kawamura K. Molecular dynamics simulations. Springer Series in Solid-State Sciences, 1992,103:88

[15] Hobson IC, Taylor R, Ainscough JB. Effect of porosity and stoichiometry on the thermal conductivity of uranium dioxide. J Phys D: Appl Phys,1974,7:1003~1015