Experimental Study of Bottom Reflooding in a Narrow Rectangular Channel

被引：0
|
作者：
Deng Y. [1 ]
Xu W. [1 ]
Liu X. [1 ]
Guo J. [1 ]
Wu D. [2 ]
机构：
[1] School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai
[2] Nuclear Power Institute of China, Chengdu
来源：
Hedongli Gongcheng/Nuclear Power Engineering | 2021年 / 42卷 / 06期
关键词：
LOCA; Narrow rectangular channel; Quench speed; Reflooding;
D O I：
10.13832/j.jnpe.2021.06.0017
中图分类号：
学科分类号：
摘要：
In order to investigate thermal hydraulic characteristics during bottom reflooding when LOCA occurs in a narrow rectangular channel, the reflooding experiments were carried out under different conditions. The narrow rectangular channel was made by welding two Inconel alloy plates. This study analyzes the bottom reflooding process according to the temperature variation curve, calculates and compares the advancing speed of the quench front (quench speed) under different experimental conditions, and studies the influence of experimental parameters on the reflooding process. Experimental results indicated that quench velocity under bottom reflooding is increasing with increased system pressure, increased inlet velocity, reduced initial wall surface temperature and increase in the degree of subcooling of the coolant. A comparative analysis of the bottom and combined reflooding case indicates that quench velocity under bottom reflooding is higher than that during combined reflooding with the same flow rate. This study lays the foundation for the research of accident prevention and mitigation of plate fuel element reactors. © 2021, Editorial Board of Journal of Nuclear Power Engineering. All right reserved.
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页码：17 / 23
页数：6
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