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Molecular dynamics simulation of collective behaviour of Xe in UO2 |
Tian Xiao-Feng(田晓峰)a), Long Chong-Sheng(龙冲生)b), Zhu Zheng-He(朱正和)a), and Gao Tao(高涛) a)† |
a Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China; b The National Key Laboratory of Nuclear Fuel and Materials, Nuclear Power Institute of China, Chengdu 610041, China |
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Abstract This paper performs atomic simulations of the nucleation and growth of Xe bubble in UO$_{2}$ at 1600 K. The bubble growth was simulated up to the bubble containing 50 Xe atoms. The Xe atoms were added directly to the bubble one by one, followed by a relaxation of the system for several picoseconds. The simulations estimated the bubble pressure and radius at different Xe concentrations. The results indicate that the bubble pressure drops with the increasing Xe/U and bubble size at low Xe concentration, while the pressure will increase with the Xe/U ratio at high Xe concentration. The swelling of the system associated with the bubble growth was also obtained. Finally, the recovery of the damaged structure was investigated.
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Received: 10 June 2009
Revised: 30 July 2009
Accepted manuscript online:
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PACS:
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64.60.Q-
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(Nucleation)
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61.72.Qq
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(Microscopic defects (voids, inclusions, etc.))
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61.72.J-
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(Point defects and defect clusters)
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28.41.Ak
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(Theory, design, and computerized simulation)
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61.66.Fn
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(Inorganic compounds)
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Cite this article:
Tian Xiao-Feng(田晓峰), Long Chong-Sheng(龙冲生), Zhu Zheng-He(朱正和), and Gao Tao(高涛) Molecular dynamics simulation of collective behaviour of Xe in UO2 2010 Chin. Phys. B 19 057102
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