氢和氘在FLiNaK熔盐中的渗透扩散行为

曾友石; 吴胜伟; 钱渊; 杜林; 王广华; 黄豫; 刘文冠; 刘卫

doi:10.11889/j.0253-3219.2018.hjs.41.010604

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氢和氘在FLiNaK熔盐中的渗透扩散行为

核能科学与工程 | 更新时间：2021-05-19

- 氢和氘在FLiNaK熔盐中的渗透扩散行为
- Permeation and diffusion behaviors of hydrogen and deuterium in molten FLiNaK
- 核技术 2018年41卷第1期文章编号：010604
- 作者机构：
  
  中国科学院上海应用物理研究所嘉定园区上海 201800
- 作者简介：
  
  [ "曾友石, 男, 1987年出生, 2015年于中国科学院上海应用物理研究所获博士学位, 研究领域为钍基熔盐堆中氚的分布", "ZENG Youshi, male, born in 1987, graduated from Shanghai Institute of Applied Physics, Chinese Academy of Sciences with a doctoral degree in 2015, focusing on the distribution of tritium in thorium based molten salt reactor" ]
  吴胜伟, E-mail:wushengwei@sinap.ac.cn WU Shengwei, E-mail:wushengwei@sinap.ac.cn
- 基金信息：
  
  中国科学院战略性先导科技专项(XDA020200)
- DOI：10.11889/j.0253-3219.2018.hjs.41.010604
  中图分类号： TL281
- 收稿日期：2017-08-31，
  
  修回日期：2017-10-27，
  
  纸质出版日期：2018-01-10
- 稿件说明：
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曾友石, 吴胜伟, 钱渊, 等. 氢和氘在FLiNaK熔盐中的渗透扩散行为[J]. 核技术, 2018,41(1):010604

Youshi ZENG, Shengwei WU, Yuan QIAN, et al. Permeation and diffusion behaviors of hydrogen and deuterium in molten FLiNaK[J]. Nuclear techniques, 2018, 41(1): 010604
曾友石, 吴胜伟, 钱渊, 等. 氢和氘在FLiNaK熔盐中的渗透扩散行为[J]. 核技术, 2018,41(1):010604 DOI： 10.11889/j.0253-3219.2018.hjs.41.010604.

Youshi ZENG, Shengwei WU, Yuan QIAN, et al. Permeation and diffusion behaviors of hydrogen and deuterium in molten FLiNaK[J]. Nuclear techniques, 2018, 41(1): 010604 DOI： 10.11889/j.0253-3219.2018.hjs.41.010604.

摘要

利用氢同位素在熔盐中的扩散渗透特性测试系统，本研究对FLiNaK熔盐中氢和氘的渗透扩散行为进行了研究。首先，通过对比分析熔盐侧充氢和金属侧充氢的实验结果，发现通过熔盐侧充氢的实验可更准确地反映FLiNaK熔盐中氢的渗透扩散行为及其性质。其次，通过熔盐侧充氢实验，获得了550-700 ℃时FLiNaK熔盐中氢的扩散系数与溶解度常数，两者可分别表述为：

=1.62×10

-5

exp（-48.20×10

）m

·s

-1

和

=6.18×10

-5

exp（-11.14×10

）mol·m

-3

·Pa

-1

。最后，通过对比分析金属侧充氢和金属侧充氘的实验结果，发现同位素效应并不影响FLiNaK熔盐中氢的渗透扩散行为及其性质的研究，从而为氢和氘代替氚进行FLiNaK熔盐中氚行为性质的研究提供实验基础。

Abstract

Background

Molten FLiNaK is a secondary heat-transfer fluid of a molten salt reactor or a FLiBe self-cooled nuclear fusion reactor

in which tritium would be produced at high rates and permeate the molten FLiNaK.

Purpose

The aim is to provide more reliable reference for tritium behaviors in molten FLiNaK by further study of the permeation and diffusion behaviors of hydrogen as well as the isotope effect on hydrogen behaviors.

Methods

Experiments on hydrogen charged at salt surface and metal surface in molten FLiNaK were conducted to study permeation and diffusion characteristics of hydrogen isotope in molten salt. And contrast experiments between hydrogen and deuterium charged at metal surface were carried out to study the isotope effect on hydrogen behaviors.

Results

The results showed that hydrogen charged at salt surface had more advantages for reporting the permeation and diffusion characteristics of hydrogen. And the diffusion coefficients and solubility constants of hydrogen in molten salt FLiNaK could be correlated to

=1.62×10

-5

exp(-48.20×10

) m

·s

-1

and

=6.18×10

-5

exp(-11.14×10

) mol·m

-3

·Pa

-1

. The deuterium showed little isotope effect on the permeation and diffusion behaviors of hydrogen in molten FLiNaK.

Conclusion

The permeation and diffusion characteristics of tritium are analogous to the hydrogen behaviors

indicating that hydrogen can be used forsubstituting tritium in the experimental researches in molten FLiNaK.

关键词

Keywords

references

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