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Analysis of Burnup effects and Its Integrity Assessment in the Interim of Irradiation with Molecular Dynamics

Published online by Cambridge University Press:  21 January 2020

Ahli K.D. Willie ,
Hongtao Zhao ,
M. Mustafa Azeem  and
Teplinskaya Svetlana
Ahli K.D. Willie
Affiliation:
Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin, 150001, China
Hongtao Zhao*
Affiliation:
Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin, 150001, China Institute of Technical Physics, Heilongjiang Academy of Sciences 150086
M. Mustafa Azeem
Affiliation:
Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin, 150001, China
Teplinskaya Svetlana
Affiliation:
College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
*
*e-mail: willie@hrbeu.edu.cn
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Abstract:

Burnups can cause major structural changes in the edge of the fuel rod and a general degradation of the thermal conductivity. In irradiated mixed oxide fuels of UO2, PuO2 with NpO2 as fission products (FP) various chemical states depending on the conditions of the fuel is developed. This work, we firstly applied the MD relation to obtain the thermal conductivity of UO2, PuO2, and (U, Pu) O2 in temperature range of 300–2000 K. Lattice parameter, Burnup and the thermal conductivity were then calculated for specified UO2 and PuO2. This calculation relates the degradation of thermal conductivity with a number of pores and increasing temperature. Finally, the migration energy barrier and the recovery energies of the obstruction type defects were calculated with molecular dynamics simulation.

Keywords

thermal conductivityoxidemolecular
Type
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MRS Advances , Volume 5 , Issue 33-34: Mechanical Behavior and Structural Materials , 2020 , pp. 1799 - 1810
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Copyright © Materials Research Society 2020

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