کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4925508 | 1431402 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Numerical investigation on the dissolution kinetics of ZrO2 by molten zircaloy using MPS method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Numerical investigation on the dissolution kinetics of ZrO2 by molten zircaloy using MPS method Numerical investigation on the dissolution kinetics of ZrO2 by molten zircaloy using MPS method](/preview/png/4925508.png)
چکیده انگلیسی
During the postulated core meltdown accident of the nuclear reactor which employs the dispersion plate-type fuel, the UO2 microspheres would be dissolved by the molten zirconium, and the dissolution process is accelerated by the mass diffusion phenomenon. In this study, the dissolution model, based on the Fick's second law and the dissolution criteria, was developed and incorporated into the Moving Particle Semi-implicit (MPS) method. To validate the dissolution model, the one-dimensional mass diffusion problem was simulated by the improved MPS code. The study of numerical convergence was also performed based on the sensitivity analysis of the particle size. The distribution of the oxygen predicted by the improved MPS agreed well with the analytical solution for the particle size of 0.5Â mm. Then the improved MPS was adopted to analyze the dissolution kinetics of the three-dimensional ZrO2-Zr system in this study. The oxygen concentration and the interface displacement of the ZrO2-Zr system were considered, and the simulation results indicate that the behavior of ZrO2 dissolution caused by molten zircaloy follows the parabolic law. The improved MPS method is proved to be capable of simulating the dissolution process and the induced phase change.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Engineering and Design - Volume 319, 1 August 2017, Pages 117-125
Journal: Nuclear Engineering and Design - Volume 319, 1 August 2017, Pages 117-125
نویسندگان
Ronghua Chen, Yonglin Li, Kailun Guo, Wenxi Tian, Suizheng Qiu, G.H. Su,