Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2020, Vol. 31 ›› Issue (7): 65 doi: 10.1007/s41365-020-00780-z

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Numerical investigation of natural convection characteristics of a heat pipe-cooled passive residual heat removal system for molten salt reactors

Cheng-Long Wang1,2,3 • Hao Qin1,2,3 • Da-Lin Zhang1,2,3 • Wen-Xi Tian1,2,3 • Guang-Hui Su1,2,3 • Sui-Zheng Qiu1,2,3   

  1. 1Department of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
    2Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, Xi’an Jiaotong University, Xi’an 710049, China
    3State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
  • Received:2020-02-10 Revised:2020-04-21 Accepted:2020-04-27
  • Contact: Cheng-Long Wang; Sui-Zheng Qiu E-mail:chlwang@mail.xjtu.edu.cn;szqiu@mail.xjtu.edu.cn
  • Supported by:
    This work was supported by the National Key R&D Program of China (No. 2019YFB1901100), the National Natural Science Foundation of China (No. 11705138), and the China National Postdoctoral Program for Innovative Talents (No. BX201600124).
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Cheng-Long Wang, Hao Qin, Da-Lin Zhang, Wen-Xi Tian, Guang-Hui Su, Sui-Zheng Qiu. Numerical investigation of natural convection characteristics of a heat pipe-cooled passive residual heat removal system for molten salt reactors.Nuclear Science and Techniques, 2020, 31(7): 65     doi: 10.1007/s41365-020-00780-z

Abstract: The limited availability of studies on the natural convection heat transfer characteristics of fluoride salt has hindered progress in the design of passive residual heat removal systems (PRHRS) for molten salt reactors. This paper presents results from a numerical investigation of natural convection heat transfer characteristics of fluoride salt and heat pipes in the drain tank of a PRHRS. Simulation results are compared with experimental data, demonstrating the accuracy of the calculation methodology. Temperature distribution of fluoride salt and heat transfer characteristics are obtained and analyzed. The radial temperature of liquid fluoride salt in the drain tank shows a uniform distribution, while temperatures increase with increasing axial height from the bottom to the top of the drain tank. In addition, natural convection intensity increases with increasing height of the heat pipes in the tank. Spacing between heat pipes has no obvious effect on the natural convection heat transfer coefficient. This study will contribute to the design of passive heat removal systems for advanced nuclear reactors.

Key words: Molten salt reactor, Passive heat removal system, Heat pipe, Natural convection, Numerical simulation