• NUCLEAR TECHNIQUES
  • Vol. 47, Issue 7, 070604 (2024)
Shuaiyu XUE1,2, Chong ZHOU1,2,*, Yang ZOU1,2, and Hongjie XU1,2
Author Affiliations
  • 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
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    DOI: 10.11889/j.0253-3219.2024.hjs.47.070604 Cite this Article
    Shuaiyu XUE, Chong ZHOU, Yang ZOU, Hongjie XU. Natural circulation characteristics of main loop after shutdown of liquid-fuel molten salt reactor[J]. NUCLEAR TECHNIQUES, 2024, 47(7): 070604 Copy Citation Text show less
    Schematic of liquid-fuel molten salt reactor
    Fig. 1. Schematic of liquid-fuel molten salt reactor
    Diagram of passive residual heat-removal system for liquid-fuel molten salt reactor
    Fig. 2. Diagram of passive residual heat-removal system for liquid-fuel molten salt reactor
    Natural circulation model for the main loop
    Fig. 3. Natural circulation model for the main loop
    Coordinate model for natural circulation loop
    Fig. 4. Coordinate model for natural circulation loop
    Schematic of CIET1.0 loop
    Fig. 5. Schematic of CIET1.0 loop
    Temperature distribution (a) and flow rate (b) of natural circulation loop (not considering decay heat)
    Fig. 6. Temperature distribution (a) and flow rate (b) of natural circulation loop (not considering decay heat)
    Temperature distribution (a) and flow rate (b) of natural circulation loop (considering decay heat)
    Fig. 7. Temperature distribution (a) and flow rate (b) of natural circulation loop (considering decay heat)
    Effect of natural circulation loop on physical properties (a) Without decay heat, (b) With decay heat
    Fig. 8. Effect of natural circulation loop on physical properties (a) Without decay heat, (b) With decay heat
    Effect of natural circulation loop on structural parameters (a) Without decay heat, (b) With decay heat
    Fig. 9. Effect of natural circulation loop on structural parameters (a) Without decay heat, (b) With decay heat
    Effect of natural circulation loop on local drag coefficient K (a) Without decay heat, (b) With decay heat
    Fig. 10. Effect of natural circulation loop on local drag coefficient K (a) Without decay heat, (b) With decay heat
    参数名称Parameter name值Value
    额定功率Core rate power / MW60
    堆芯高度Core height / m3.3
    堆芯熔盐体积Core molten salt volume / m33
    衰变功率密度Decay power density / MW·m-30.4
    换热器平均换热系数Average heat transfer coefficient of heat exchanger / W·(m2·K)-12 000
    换热器高度Height of heat exchanger / m5.2
    冷热芯高度差Height difference between cold and hot cores / m5.75
    回路管道直径Loop pipe diameter / m0.3
    Table 1. Parameters of natural circulation circuit structure
    参数名称Parameter name值Value
    密度Density / kg·m-32 639-0.528 6×T
    比热容Specific heat capacity / J·(kg·K-1) -12 000
    导热系数Thermal conductivity / W·(m·K) -11.4
    动力黏度Dynamic viscosity / Pa·s0.003 6×exp(7 043.24/T)×0.001
    热膨胀系数Thermal expansion coefficient / K-11/(4 719.2-T)
    Table 2. Physical parameters of molten salt

    参数名称

    Parameter name

    Value

    密度Density / kg·m-31 078-0.85×T
    比热容Specific heat capacity / J·(kg·K) -11 518+2.82×T

    导热系数

    Thermal conductivity / W·(m·K) -1

    0.142-0.000 16×T
    动力黏度Dynamic viscosity / kg·(m·s) -10.13/T 1.072
    Table 3. Physical parameters of dowtherm A

    参数名称

    Parameter name

    DHX电热管

    Electric heating tube

    热边

    Hot leg

    TCHX

    冷边

    Cold leg

    长度Length / m1.4834.2741.5644.915
    高度Altitude difference / m1.4833.696-0.416-4.763
    水力直径Hydraulic diameter / mm6.927.911.927.9
    流通面积Circulation area / 10-4 m27.186.1113.36.11
    Table 4. Structural parameters of DRACS[17]

    案例

    Case

    DHX功率

    Heat added to

    DHX / W

    TTCHX.out

    / K

    实验结果

    Gana analytical / kg·s-1

    A-1931.8319.43.496 7×10-2
    A-21 088.3319.13.721 4×10-2
    B-1454.4308.42.429 7×10-2
    B-2766.2308.23.047 8×10-2
    C-1582.6313.62.798 9×10-2
    C-2785.9313.43.174 8×10-2
    Table 5. CIET1.0 experimental results

    案例

    Case

    DHX功率

    Heat added to DHX / W

    TTCHX.out

    / K

    NCCC回路流量计算结果

    GNCCC-predicted / kg·s-1

    实验计算结果

    Gana analytical / kg·s-1

    误差

    Error / % (GNCC-Gana) / Gana

    A-1931.8319.43.61×10-23.496 7×10-23.24
    B-1454.4308.42.48×10-22.429 7×10-22.07
    C-1582.6313.62.88×10-22.798 9×10-22.89
    Table 6. Program verification results
    Shuaiyu XUE, Chong ZHOU, Yang ZOU, Hongjie XU. Natural circulation characteristics of main loop after shutdown of liquid-fuel molten salt reactor[J]. NUCLEAR TECHNIQUES, 2024, 47(7): 070604
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