Macro-Mesoscale In-Pile Thermal-Mechanical Behavior Simulation of a UMo/Zr Monolithic Fuel Plate

Frontiers in Energy Research

Energy Research

Feng Yan¹  Xiangzhe Kong¹  Shurong Ding¹  Xiaobin Jian¹  Yuanming Li²  Wenjie Li²  Chuan Lu²  Zixuan Guo² 

[1] Institute of Mechanics and Computational Engineering, Department of Aeronautics and Astronautics, Fudan University, Shanghai, China;Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, China;

关键词: UMo/Zr;    irradiation-thermal-mechanical behavior;    gas-bubble volume fraction;    gasbubble inner pressure;    skeleton stress;   

DOI  :  10.3389/fenrg.2021.801398

 received in 2021-10-25, accepted in 2021-12-07,  发布年份 2022

来源: Frontiers

【 摘 要 】

UMo/Zr monolithic fuel plates have a promising application prospect in high flux research reactors. To prolong the service life and achieve safety design, the in-pile macro-mesoscale thermal-mechanical behavior of the fuel plate needs further simulation research. In this study, for the fuel meat, the theoretical models of the equivalent fission gas bubble volume fraction, the gas-bubble inner pressure and the maximum skeleton stress are developed, with the effects of bubble distribution pattern involved. The application into the simulation of the in-pile macro-mesoscale thermal-mechanical behavior of the UMo/Zr monolithic fuel plate indicates that the maximum skeleton stress of the fuel meat basically rises with the burn-up, and may reach four times of the macroscale first principal stress of the fuel meat. The distribution patterns of the gas bubbles in the fuel meat might have a distinct influence on the maximum skeleton stress, and the most conservative results of the simple cubic arrangement can be used for the failure prediction of the fuel meat.

【 授权许可】

Unknown   
Copyright © 2022 Kong, Jian, Yan, Li, Guo, Lu, Ding and Li.

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