Nuclear Techniques ›› 2020, Vol. 43 ›› Issue (10): 100605-100605.doi: 10.11889/j.0253-3219.2020.hjs.43.100605

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles    

Study on the particle size distribution of high temperature FLiBe molten salt

Lizhi LIU1,2,Haiying FU1,Zhongying LIU1,Jifei MA1,Lin DU1,Xiaoxing TANG1,Yuan QIAN1,Jian YAO1(),Yulan LI1()   

  1. 1.Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2.University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-04-08 Revised:2020-07-11 Online:2020-10-15 Published:2020-10-14
  • Contact: Jian YAO,Yulan LI E-mail:yaojian@sinap.ac.cn;liyulan@sinap.ac.cn
  • About author:LIU Lizhi, male, born in 1993, graduated from Nanjing University of Technology in 2016, master student, focusing on the characteristics of high temperature molten salt particles
  • Supported by:
    National Natural Science Youth Fund(11705267);WANG Kuancheng Education Fund(GJTD-2018-10)

Abstract: Background

Beryllium bearing molten salt has strong chemical toxicity, hence needs to be accurately monitored and effectively removed at high temperature.

Purpose

This study aims at the characteristics of particle size distribution of high temperature FLiBe molten salt.

Methods

Based on the experimental device of low pressure distillation of molten salt and Dekati low pressure impact sampler (DLPI), an experimental device for measuring the particle size of high temperature molten salt particles was set up, and the particle size distribution of FLiBe molten salt under different experimental conditions was studied. The effect of gas purging and different sampling time on the particle size distribution of molten salt particles under high temperature were investigated, and scanning electron microscope (SEM) was employed to examine the experimental measurement results.

Results & Conclusions

The experimental results show that the particle size of the molten salt particles is concentrated above 2.5 μm at room temperature, while at high temperature, it is concentrated at 0.26~2.5 μm. The sampling time has no obvious influence on the particle size distribution of molten salt particles; although the final concentration of molten salt particles is changed by gas purging, it does not significantly affect the particle size distribution. The SEM results of the collected samples verify the accuracy of the particle size scale of the experimental device, and it is observed by SEM that the molten salt particles are in the shape of regular spherical rather than crystalline, which may be caused by the collision and deposition of molten salt particles.

Key words: TMSR, FLiBe, High temperature molten salt, Particle size distribution

CLC Number: 

  • TL99