NUCLEAR TECHNIQUES, Volume. 48, Issue 4, 040610(2025)
Analysis of load following capability for small fluoride-salt-cooled high- temperature advanced reactor
Figures & Tables(19)
Fig. 2. Schematic diagram of the FuSTAR reactor vessel (color online)
Fig. 3. Radial power distribution of FuSTAR components (MW) (color online)
Fig. 5. Schematic diagram of FuSTAR passive residual heat removal system (color online)
Fig. 8. Reactivity disturbance response of FuSTAR without control system (a) Power, (b) Reactivity, (c) Key temperature parameters of core, (d) Core outlet temperature deviation
Fig. 9. Reactivity disturbance response of FuSTAR under controlled system (a) Power, (b) Reactivity, (c) Key temperature parameters of core, (d) Core outlet temperature deviation
Fig. 10. FuSTAR load following characteristics for high power level in uncontrolled system (a) Power, (b) Reactivity, (c) Key temperature parameters of core, (d) Core outlet temperature deviation
Fig. 11. FuSTAR load following characteristics for low power level in uncontrolled system (a) Power, (b) Reactivity, (c) Key temperature parameters of core, (d) Core outlet temperature deviation
Fig. 12. FuSTAR load following characteristics for high power level under controlled system (a) Power, (b) Reactivity, (c) Key temperature parameters of core, (d) Core outlet temperature deviation
Fig. 13. FuSTAR load following characteristics for low power level under controlled system (a) Power, (b) Reactivity, (c) Key temperature parameters of core, (d) Core outlet temperature deviation
Fig. 14. Response of key parameters under linear rise and fall tests of load (a) Power, (b) Reactivity, (c) Key temperature parameters of core, (d) Core outlet temperature deviation
Table 1. FuSTAR overall parameters
View tableView in ArticleTable 1. FuSTAR overall parameters
参数Parameter 值Value 热功率 Power / MW 125 运行压力Pressure / MPa ~0.1 进出口温度 Inlet and outlet temperature / K 923.15/973.15 堆本体冷却剂 Reactor vessel coolant FLiBe 燃料 Fuel 螺旋十字型燃料 Helical cruciform fuel 慢化剂 Moderator 石墨 Graphite 包壳 Cladding 碳-碳复合材料 C-C composite material 燃料多普勒系数 Fuel doppler coefficient / 10-5 K-1 -3.23 冷却剂温度反馈系数 Coolant temperature feedback coefficient / 10-5 K-1 -0.21 慢化剂温度反馈系数 Moderator temperature feedback coefficient / 10-5 K-1 -0.12 堆芯冷却方式 Core cooling method 强迫循环 Forced circulation 堆芯流量 Core mass flow rate / kg·s-1 1 050 堆芯高度 Core height / m 3 余排系统冷却剂 Coolant for residual heat removal system FLiNaK 能量转换系统冷却剂 Coolant for energy conversion system SCO2 换热器 Heat exchanger PCHE 换热器材料 Heat exchanger material Hastelloy-N
Table 2. Steady state calculations of FuSTAR
View tableView in ArticleTable 2. Steady state calculations of FuSTAR
参数
Parameter
设计值
Design value
计算值
Calculated value
相对误差
Relative error / %
热功率 Power / MW 125 125.02 0.016 堆芯入口温度 Core inlet temperature / K 923.15 923.14 0.001 堆芯出口温度 Core outlet temperature / K 973.15 973.03 0.012 堆芯流量 Core mass flow rate / kg·s-1 1 050 1 050.6 0.057 堆芯压差 Core pressure difference / MPa 0.14 0.136 2.857
Table 3. Safety temperature limit of FuSTAR
View tableView in ArticleTable 3. Safety temperature limit of FuSTAR
温度限值
Temperature limit
数值
Value
燃料峰值温度
Maximum fuel temperature / K
<1 573 包壳表面峰值温度
Maximum temperature of cladding / K
<1 703 FLiBe最高温度
Maximum temperature of FLiBe / K
<1 003 FLiBe最低温度
Minimum temperature of FLiBe / K
>732 FLiNaK最低温度
Minimum temperature of FLiNaK / K
>728
Table 4. Effect of control system on overshoot and settling time under different load step conditions.
View tableView in ArticleTable 4. Effect of control system on overshoot and settling time under different load step conditions.
工况
Working condition
有无控制系统
Availability of control system
功率超调量
Power overshoot / %
功率调节时间
Power adjustment time / s
100% FP–90% FP 无控制 Uncontrolled 0.94 680 有控制 Under control 0.31 342 90% FP–100% FP 无控制 Uncontrolled 0.91 672 有控制 Under control 0.29 315 20% FP–30% FP 无控制 Uncontrolled 11.28 1 379 有控制 Under control 3.80 279 30% FP–20% FP 无控制 Uncontrolled 13.84 1 612 有控制 Under control 4.55 312
Table 5. Effect of control system on overshoot and settling time under linear rise and fall of load
View tableView in ArticleTable 5. Effect of control system on overshoot and settling time under linear rise and fall of load
工况
Working condition
有无控制系统
Availability of control system
功率超调量
Power overshoot / %
功率调节时间
Power adjustment time / s
100%FP – 5%FP/min – 50%FP 无控制 Uncontrolled 6.36 1 663 有控制 Under control 0.98 719 50%FP – 5%FP/min – 100%FP 无控制 Uncontrolled 1.81 1 515 有控制 Under control 0.23 678
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Xindi LYU, Dalin ZHANG, Xinyu LI, Yu LIANG, Jian DENG, Suizheng QIU, Guanghui SU. Analysis of load following capability for small fluoride-salt-cooled high- temperature advanced reactor[J]. NUCLEAR TECHNIQUES, 2025, 48(4): 040610
Paper Information
Category: NUCLEAR ENERGY SCIENCE AND ENGINEERING
Received: May. 10, 2024
Accepted: --
Published Online: Jun. 3, 2025
The Author Email: Dalin ZHANG (张大林)
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