熔盐堆应急排盐冷却系统换热管内层屏障破损传热影响

孙亮洁; 梁荣健; 蒋文涛; 王超群; 杨群; 何兆忠; 邹杨

doi:10.3724/j.0253-3219.2026.hjs.49.250003

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熔盐堆应急排盐冷却系统换热管内层屏障破损传热影响

核能科学与工程 | 更新时间：2026-02-13

- 熔盐堆应急排盐冷却系统换热管内层屏障破损传热影响
- Effects of bayonet tube leak on the heat transfer characteristics of fuel drain system in molten salt reactor
- 核技术 2026年49卷第2期文章编号：020605
- 作者机构：
  
  1.中国科学院上海应用物理研究所上海 201800
  2.中国科学院大学北京 100049
- 作者简介：
  
  孙亮洁，男，1999年出生，2019年毕业于华中科技大学，现为博士研究生，研究领域为反应堆安全
  杨群，E-mail：yangqun@sinap.ac.cn
- 基金信息：
  
  中国科学院青年创新促进会(E3292901);上海市"基础研究特区计划"(JCYJ-SHFY-2021-003)
- DOI：10.3724/j.0253-3219.2026.hjs.49.250003
  中图分类号： TL364
- 收稿：2025-01-06，
  
  修回：2025-04-29，
  
  纸质出版：2026-02-15
- 稿件说明：
移动端阅览
孙亮洁,梁荣健,蒋文涛等.熔盐堆应急排盐冷却系统换热管内层屏障破损传热影响[J].核技术,2026,49(02):020605.

SUN Liangjie,LIANG Rongjian,JIANG Wentao,et al.Effects of bayonet tube leak on the heat transfer characteristics of fuel drain system in molten salt reactor[J].NUCLEAR TECHNIQUES,2026,49(02):020605.
孙亮洁,梁荣健,蒋文涛等.熔盐堆应急排盐冷却系统换热管内层屏障破损传热影响[J].核技术,2026,49(02):020605. DOI： 10.3724/j.0253-3219.2026.hjs.49.250003. CSTR： 32193.14.hjs.CN31-1342/TL.2026.49.250003.

SUN Liangjie,LIANG Rongjian,JIANG Wentao,et al.Effects of bayonet tube leak on the heat transfer characteristics of fuel drain system in molten salt reactor[J].NUCLEAR TECHNIQUES,2026,49(02):020605. DOI： 10.3724/j.0253-3219.2026.hjs.49.250003. CSTR： 32193.14.hjs.CN31-1342/TL.2026.49.250003.

摘要

液体燃料熔盐堆是第四代先进核能系统的候选堆型之一，应急排盐冷却系统是其可设置的特殊安全设计。本文以熔盐实验堆（Molten Salt Reactor Experiment，MSRE）应急排盐冷却系统为研究对象，探究换热元件内层屏障破损对其正常余热导出功能的影响。该研究基于计算流体动力学（Computational Fluid Dynamics，CFD）模拟方法，通过构建传热和多相流动模型分析破损后的传热和流动现象，并对关键影响参数进行敏感性分析。结果表明，内层套管破损后，18.4%的冷却水从破损位置经气隙层流出，单根换热元件功率提升到29.434 kW，破损位置附近外层套管出现局部温度低点。敏感性分析结果表明，破损尺寸、破损位置和气隙层压力变化均会对换热元件传热产生明显影响，其中传热对破损尺寸的敏感性最强。该分析结果可以为熔盐堆应急排盐冷却系统工程设计提供研究数据。

Abstract

Background

The liquid-fueled molten salt reactor (MSR) is one of the candidates for the Generation IV reactor technologies

and the fuel drain system is a special safety design.

Purpose

This study aims to investigate the influence of inner barrier leak of one heat exchange element of MSR on heat transfer characteristics.

Methods

Firstly

the fuel drain system of Molten Salt Reactor Experiment (MSRE) was taken as the research object

and computational fluid dynamics (CFD) simulation methods were employed to construct heat transfer and multiphase flow models to analyze the heat transfer and flow phenomena under normal operation and bayonet tube leak scenario. Then

the sensitivity analyses of key influencing parameters

such as the leak size (3~8 mm)

leak location (10~1 500 mm above the lower end of the heat exchange element) and pressure in the annular gas space (ranging from -13 788 Pa to 13 788 Pa)

were carried out.

Results

The analysis results show that 18.4% of cooling water flows out from the leak location through the annular gas space when bayonet tube leak occurs and the power of one single heat exchange element increases to 29.434 kW. In addition

the lowest abnormal temperature appears in the thimble near the leak location. The sensitivity analysis results present that the heat transfer varies with the leak size

leak location and pressure of annular gas space and is most sensitive to leak size.

Conclusions

These analysis results of this study are valuable to the engineering design of the fuel drain system for MSRs.

关键词

Keywords

references

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