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 (9): 85 doi: 10.1007/s41365-020-00803-9


Core and blanket thermal–hydraulic analysis of a molten salt fast reactor based on coupling of OpenMC and OpenFOAM

Bin Deng1,2,3 • Yong Cui1,2,3 • Jin-Gen Chen1,2,3 • Long He1,2 • Shao-Peng Xia1,2 • Cheng-Gang Yu1,2 • Fan Zhu1,2,3 • Xiang-Zhou Cai1,2,3   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2 CAS Innovative Academy in TMSR Energy System, Chinese Academy of Science, Shanghai 201800, China
    3 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-05-15 Revised:2020-07-21 Accepted:2020-07-22
  • Contact: Jin-Gen Chen
  • Supported by:
    This work was supported by the Chinese TMSR Strategic Pioneer Science and Technology Project (No. XDA02010000) and the Frontier Science Key Program of the Chinese Academy of Sciences (No. QYZDY-SSW-JSC016).
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Bin Deng, Yong Cui, Jin-Gen Chen, Long He, Shao-Peng Xia, Cheng-Gang Yu, Fan Zhu, Xiang-Zhou Cai. Core and blanket thermal–hydraulic analysis of a molten salt fast reactor based on coupling of OpenMC and OpenFOAM.Nuclear Science and Techniques, 2020, 31(9): 85     doi: 10.1007/s41365-020-00803-9

Abstract: In the core of a molten salt fast reactor (MSFR), heavy metal fuel and fission products can be dissolved in a molten fluoride salt to form a eutectic mixture that acts as both fuel and coolant. Fission energy is released from the fuel salt and transferred to the second loop by fuel salt circulation. Therefore, the MSFR is characterized by strong interaction between the neutronics and the thermal hydraulics. Moreover, recirculation flow occurs, and nuclear heat is accumulated near the fertile blanket, which significantly affects both the flow and the temperature fields in the core. In this work, to further optimize the conceptual geometric design of the MSFR, three geometries of the core and fertile blanket are proposed, and the thermal–hydraulic characteristics, including the three-dimensional flow and temperature fields of the fuel and fertile salts, are simulated and analyzed using a coupling scheme between the open source codes OpenMC and OpenFOAM. The numerical results indicate that a flatter core temperature distribution can be obtained and the hot spot and flow stagnation zones that appear in the upper and lower parts of the core center near the reflector can be eliminated by curving both the top and bottom walls of the core. Moreover, eight cooling loops with a total flow rate of 0.0555 m3 s-1 ensure an acceptable temperature distribution in the fertile blanket.

Key words: Molten salt fast reactor, Core and blanket thermal–hydraulic analysis, Neutronics and thermal hydraulics coupling