Nuclear Techniques ›› 2020, Vol. 43 ›› Issue (3): 30503-030503.doi: 10.11889/j.0253-3219.2020.hjs.43.030503

• NUCLEAR PHYSICS, INTERDISCIPLINARY RESEARCH • Previous Articles     Next Articles

Numerical simulation of motion characteristics of solid particles in liquid metal

Peng LIU,Xiaochao DU(),Feng HONG,Xianbao YUAN   

  1. School of Mechanical and Power Engineering, China Three Gorges University, Yichang 443002, China
  • Received:2019-07-10 Revised:2019-10-25 Online:2020-03-15 Published:2020-03-24
  • Contact: Xiaochao DU E-mail:duxc@ctgu.edu.cn
  • About author:LIU Peng, male, born in 1993, graduated from Hebei University of Technology in 2016, master student, focusing on reactor thermal hydraulic

Abstract: Background

Liquid lead-bismuth alloy (LBE) is the preferred coolant material for the 4th generation liquid metal cooled fast reactor, but it is difficult to reduce the oxygen concentration. Theoretically, the oxygen concentration can be reduced by the reaction of hydride with oxygen. However, the reaction product insoluble microparticles will threaten the safe operation of the reactor.

Purpose

This study aims at the floating law of particles in liquid lead-bismuth alloy that has significant reference for the collection of impurities and the purification of lead-bismuth alloy.

Methods

The fluent software was used to analyze and simulate the movement of solid particles in a cylindrical box. The standard k-ε model was adopted for continuous phase whilst the discrete phase model (DPM) was used for solid phase particulate matter to study the movement of particles in lead-bismuth alloy.

Results & Conclusion

The distribution of the large diameter particles is close to the axial center of the cylinder, and the distribution of the small diameter particles is farther from the axial position than that of the larger particles. The particles with large diameter have a short floating time, the particles with small diameters have a long floating time, and the temperature has little influence on the floating time and can be ignored. With a radius of about 90 mm around the central axis, the concentration of the particles is 2~3 times higher than that of other positions. Therefore, the attention should be paid to this range when purifying the lead-bismuth alloy, and the efficiency and effect of purification are good.

Key words: Lead-bismuth alloy, Particulate matter, Floating motion

CLC Number: 

  • TL99