Nuclear Techniques ›› 2019, Vol. 42 ›› Issue (7): 0-070602-10.doi: 10.11889/j.0253-3219.2019.hjs.42.070602

• NUCLEAR ENERGY SCIENCE AND ENGINEERING •    

Optimal design of the bayonet cooling tube in the passive decay heat removal system for the 373 MW molten salt reactor

Wanjue HUANG1,2,3,Bo XU1,Chong ZHOU1,Yang ZOU1(),Hongjie XU1   

  1. 1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. ShanghaiTech University, Shanghai 201210, China
  • Received:2019-04-10 Revised:2019-04-25 Online:2019-07-10 Published:2019-07-16
  • Contact: Yang ZOU E-mail:zouyang@sinap.ac.cn
  • About author:HUANG Wanjue, female, born in 1992, graduated from Southeast University in 2015, master student, focusing on nuclear reactor thermal-hydraulic
  • Supported by:
    Supported by Shanghai Youth Science and Technology Talent Sailing Project (No.17YF1423900), Strategic Priority Research Program of Chinese Academy of Sciences (No.XDA02010000), Thorium Uranium Fuel Cycle Characteristics and Key Problem Research Project(No.QYZDY-SSW-JSC016)

Abstract: Background

The molten salt reactor is one of the candidates for the fourth generation advanced nuclear energy system. It has the characteristics of good economy, high safety and flexible fuel cycle. The passive decay heat removal system for the fuel drain tank is the key of passive safety system of the molten salt reactor.

Purpose

This study aims to optimize the design of the passive decay heat removal system for the 373 MW molten salt reactor.

Methods

First of all, the design scheme of the passive decay heat removal system for the molten salt reactor experiment (MSRE) was taken as case application, calculation results of application by using the MATLAB program were compared with that of thermal-hydraulic analysis software FLUENT. Both of them were verified as the passive decay heat removal system design and analysis software for molten salt reactor. Then, in the case of the 373 MW molten salt reactor, the preliminary design scheme of the passive decay heat removal system for the fuel drain tank was proposed. Finally, a series of analysis and optimization of the core component - the bayonet cooling tubes were conducted on the basis of the simulation results of FLUENT. [Results and

Conclusion

The results show that the bayonet cooling tubes arranged at 95.0 mm square spacing value can achieve maximum economic efficiency under the premise that the maximum wall temperature of the heat exchanger does not exceed the safety limit of 977.4 K, and the decrease of the air gap has a little effect on system.

Key words: Molten salt reactor, Fuel drain tank, Passive decay heat removal system, Bayonet cooling tube, Air gap

CLC Number: 

  • TL33