Mechanical analysis of UMo/Al dispersion fuel

JOURNAL OF NUCLEAR MATERIALS

卷:466

Article

Jeong, Gwan Yoon¹  Kim, Yeon Soo²  Sohn, Dong-Seong¹ 

[1] Ulsan Natl Inst Sci & Technol, Dept Nucl Engn, Ulsan 689798, South Korea

[2] Argonne Natl Lab, Argonne, IL 60439 USA

关键词: UMo/Al;    Dispersion fuel;    Fission induced creep;    Mass relocation;    FEA simulation;   

DOI  :  10.1016/j.jnucmat.2015.07.033

来源: Elsevier

【 摘 要 】

Deformation of fuel particles and mass transfer from the transverse end of fuel meat toward the meat center was observed. This caused plate thickness peaking at a location between the meat edge and the meat center. The underlying mechanism for this fuel volume transport is believed to be fission induced creep of the U-Mo/Al meat. Fuel meat swelling was measured using optical microscopy images of the cross sections of the irradiated test plates. The time-dependent meat swelling was modeled for use in numerical simulation. A distinctive discrepancy between the predicted and measured meat thickness was found at the meat ends, which was assumed to be due to creep-induced mass relocation from the meat end to the meat center region that was not considered in the meat swelling model. ABAQUS FEA simulation was performed to reproduce the observed phenomenon at the meat ends. Through the simulation, we obtained the effective creep rate constants for the interaction layers (IL) and aluminum matrix. In addition, we obtained the corresponding stress and strain analysis results that can be used to understand mechanical behavior of U-Mo/Al dispersion fuel. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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