Instability model of water-steam-liquid metal three-phase jet flow during steam generator tube rupture accident in a fast reactor

被引:0
作者
Bao, Ruiqi [1 ,2 ]
Liu, Li [1 ,2 ]
Yuan, Junjie [1 ,2 ]
Gu, Hanyang [1 ,2 ]
Zhao, Pengcheng [3 ]
机构
[1] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Minist Educ, Key Lab Nucl Power Syst & Equipment, Shanghai 200240, Peoples R China
[3] Univ South China, Minist Educ, Key Lab Adv Nucl Energy Technol Design & Safety, Hengyang 421001, Peoples R China
基金
中国国家自然科学基金;
关键词
COOLED FAST-REACTORS; VISUALIZATION; SHEETS;
D O I
10.1063/5.0251502
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The steam generator tube rupture (SGTR) accident in a lead-cooled fast reactor (LFR) results in an injection of high-pressure subcooled water from the secondary circuit into the high-temperature liquid lead-bismuth eutectic (LBE) pool in the primary loop. Rapid depressurization and phase-change heat transfer generate the steam between the water jet and liquid LBE. Based on jet instability theory, this study develops a temporal instability model focusing on the water-steam-liquid LBE three-phase flow in a cylindrical coordinate to investigate the breakup characteristics of water jet. By introducing velocity and pressure disturbances and adopting a linear assumption to the hydrodynamic governing equations, a dispersion equation is developed, and jet characteristic parameters are then defined. The effects of various operating parameters and key dimensionless numbers are further studied. By solving the dispersion equation, it is found that smaller steam film thickness and higher steam velocity enhance jet instability. Increasing jet velocity and reducing jet radius accelerate jet breakup and promote droplet refinement, while at higher jet velocities, the influence of jet radius diminishes. Additionally, the co-flow of LBE with the jet and the viscosity effect of LBE both stabilize the water jet. This model enables quantitative prediction of the breakup behavior of water jets in liquid LBE during the initial stage of SGTR accident, aiming to reveal the fundamental mechanisms of the physical process and provide theoretical guidance for safety analysis of LFR.
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页数:13
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共 35 条
  • [1] X-ray Radioscopic Visualization of Bubbly Flows Injected Through a Top Submerged Lance into a Liquid Metal
    Akashi, Megumi
    Keplinger, Olga
    Shevchenko, Natalia
    Anders, Sten
    Reuter, Markus A.
    Eckert, Sven
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2020, 51 (01): : 124 - 139
  • [2] Theoretical and experimental study of atomization from an annular liquid sheet
    Cao, JM
    [J]. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING, 2003, 217 (D8) : 735 - 743
  • [3] Experimental study on pressurization characteristics of a water droplet entrapped in molten LBE pool
    Cheng, Songbai
    Zou, Yaolei
    Dong, Yuhang
    Cheng, Hui
    Ye, Yiji
    Chen, Xiaolin
    Chen, Yunhao
    [J]. NUCLEAR ENGINEERING AND DESIGN, 2021, 378
  • [4] Dinh T.-N., 2007, Multiphase Flow Phenomena of Steam Generator Tube Rupture in a Lead-cooled Reactor System: A Scoping Analysis
  • [5] Effect of gas stream swirls on the instability of viscous annular liquid jets
    Du, Q
    Li, X
    [J]. ACTA MECHANICA, 2005, 176 (1-2) : 61 - 81
  • [6] Finoshkina D. V., 2022, Validation of the Model of Water Jet Breakup in Liquid Metal
  • [7] Finoshkina Darya, 2021, 30 INT C NUCL ENERGY
  • [8] Instability breakup model of power-law fuel annular jets in slight multiple airflows
    Guo, Jin-Peng
    Wang, Yi-Bo
    Bai, Fu-Qiang
    Du, Qing
    [J]. PHYSICS OF FLUIDS, 2020, 32 (09)
  • [9] Unstable breakup of a power-law liquid fuel jet in the presence of a gas crossflow
    Guo, Jin-Peng
    Wang, Yi-Bo
    Bai, Fu-Qiang
    Du, Qing
    [J]. FUEL, 2020, 263
  • [10] Effect of liquid and air swirl strength and relative rotational direction on the instability of an annular liquid sheet
    Ibrahim, A. A.
    Jog, M. A.
    [J]. ACTA MECHANICA, 2006, 186 (1-4) : 113 - 133