NUCLEAR TECHNIQUES, Volume. 47, Issue 7, 070604(2024)
Natural circulation characteristics of main loop after shutdown of liquid-fuel molten salt reactor
Figures & Tables(16)
Fig. 2. Diagram of passive residual heat-removal system for liquid-fuel molten salt reactor
Fig. 6. Temperature distribution (a) and flow rate (b) of natural circulation loop (not considering decay heat)
Fig. 7. Temperature distribution (a) and flow rate (b) of natural circulation loop (considering decay heat)
Fig. 8. Effect of natural circulation loop on physical properties (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
Fig. 10. Effect of natural circulation loop on local drag coefficient K (a) Without decay heat, (b) With decay heat
Table 1. Parameters of natural circulation circuit structure
View tableView in ArticleTable 1. Parameters of natural circulation circuit structure
参数名称Parameter name 值Value 额定功率Core rate power / MW 60 堆芯高度Core height / m 3.3 堆芯熔盐体积Core molten salt volume / m3 3 衰变功率密度Decay power density / MW·m-3 0.4 换热器平均换热系数Average heat transfer coefficient of heat exchanger / W·(m2·K)-1 2 000 换热器高度Height of heat exchanger / m 5.2 冷热芯高度差Height difference between cold and hot cores / m 5.75 回路管道直径Loop pipe diameter / m 0.3
Table 2. Physical parameters of molten salt
View tableView in ArticleTable 2. Physical parameters of molten salt
参数名称Parameter name 值Value 密度Density / kg·m-3 2 639-0.528 6×T 比热容Specific heat capacity / J·(kg·K-1) -1 2 000 导热系数Thermal conductivity / W·(m·K) -1 1.4 动力黏度Dynamic viscosity / Pa·s 0.003 6×exp(7 043.24/T)×0.001 热膨胀系数Thermal expansion coefficient / K-1 1/(4 719.2-T)
Table 3. Physical parameters of dowtherm A
View tableView in ArticleTable 3. Physical parameters of dowtherm A
参数名称
Parameter name
值
Value
密度Density / kg·m-3 1 078-0.85×T 比热容Specific heat capacity / J·(kg·K) -1 1 518+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) -1 0.13/T 1.072
Table 4. Structural parameters of DRACS[17]
View tableView in ArticleTable 4. Structural parameters of DRACS[17]
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 / m 1.483 4.274 1.564 4.915 高度Altitude difference / m 1.483 3.696 -0.416 -4.763 水力直径Hydraulic diameter / mm 6.9 27.9 11.9 27.9 流通面积Circulation area / 10-4 m2 7.18 6.11 13.3 6.11
Table 5. CIET1.0 experimental results
View tableView in ArticleTable 5. CIET1.0 experimental results
案例
Case
DHX功率
Heat added to
DHX / W
TTCHX.out
/ K
实验结果
Gana analytical / kg·s-1
A-1 931.8 319.4 3.496 7×10-2 A-2 1 088.3 319.1 3.721 4×10-2 B-1 454.4 308.4 2.429 7×10-2 B-2 766.2 308.2 3.047 8×10-2 C-1 582.6 313.6 2.798 9×10-2 C-2 785.9 313.4 3.174 8×10-2
Table 6. Program verification results
View tableView in ArticleTable 6. Program verification 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-1 931.8 319.4 3.61×10-2 3.496 7×10-2 3.24 B-1 454.4 308.4 2.48×10-2 2.429 7×10-2 2.07 C-1 582.6 313.6 2.88×10-2 2.798 9×10-2 2.89
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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
Paper Information
Category: Research Articles
Received: Nov. 15, 2023
Accepted: --
Published Online: Aug. 27, 2024
The Author Email: ZHOU Chong (周翀)
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