Numerical analysis of the melt behavior in a fuel support piece of the BWR by MPS

被引：22

作者：

Chen, Ronghua ^{[1
]}

Chen, Lie ^{[1
]}

Guo, Kailun ^{[1
]}

Yamaji, Akifumi ^{[2
]}

Furuya, Masahiro ^{[3
]}

Tian, Wenxi ^{[1
]}

Su, G. H. ^{[1
]}

Qiu, Suizheng ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Nucl Sci & Technol, Xian 710049, Peoples R China

[2] Waseda Univ, Grad Sch Adv Sci & Engn, Cooperat Major Nucl Energy, Tokyo 1698555, Japan

[3] Cent Res Inst Elect Power Ind, 2-11-1 Iwado Kita, Komae, Tokyo 2018511, Japan

来源：

ANNALS OF NUCLEAR ENERGY | 2017年 / 102卷

关键词：

MPS method; Fuel support piece; Severe accident; Freezing behavior; PARTICLE; SIMULATION; ENHANCEMENT; PREDICTION; STABILITY; ACCIDENT; FLOWS;

D O I：

10.1016/j.anucene.2017.01.007

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The fuel support piece in a boiling water reactor (BWR) is used to brace fuel assemblies. The channel within the fuel support piece is determined to be a potential corium relocation path from the core region to the lower head during the severe accident of BWR. In the present study, the improved ***Moving Particle Semi-implicit (MPS) method was adopted to simulate the flow and solidification behavior of the melt in a fuel support piece. The MPS method was first validated against the Pb-Bi plate ablation test that was perfornied by CRIEPI. The predicted ablation mass of the plate agreed well with the experimental results. Then the flowing and freezing behaviors of molten stainless steel (SS) and zircaloy in the fuel support piece were simulated by MPS method with a three dimensional particle configuration, respectively. In this study, the flow and solidification behavior of SS was simulated first. After all the SS passed through the channel, the flowing behavior of Zr in the fuel support piece was simulated. The simulation results indicated that the crust layer formed on the inner surface of the fuel support piece during the melt discharging process. The fuel support piece was plugged by the solidified zircaloy particles in the lower initial temperature case. The fuel support piece kept intact in all the calculation that were performed under the assumed order of melt injection. The present results could help to reveal the progression of a BWR severe accident. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：422 / 439

页数：18

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