NUCLEAR TECHNIQUES, Volume. 47, Issue 11, 110603(2024)
Characteristics of reactivity insertion accident of heat pipe reactors using different thermoelectric conversion systems
Figures & Tables(13)
![Structural diagram of SBL-30 system at Sandia laboratory[15]](/Images/icon/loading.gif){kind=icon}
Fig. 2. Structural diagram of SBL-30 system at Sandia laboratory[15]
Fig. 3. Calculated and experimental result comparisons of SBL-30 system (a) Temperature prediction vs. experimental data, (b) Pressure prediction vs. experimental data, (c) Flow prediction vs. experimental data
Fig. 4. Diagram of core arrangement and fuel structure of SAIRS-C heat pipe reactor(a) Reactor configuration of SAIRS-C, (b) UN fuel structure of SAIRS-C
Fig. 5. Comparisons of reactor power (a) and average temperature (b) for different thermoelectric conversion systems
Fig. 6. Variation of hot end temperature (a), system output power and conversion efficiency (b) for semiconductor thermoelectric conversion system
Fig. 7. Variations of hot end temperature (a), system output power and conversion efficiency (b) for stirling thermoelectric conversion system
Fig. 8. Parameter variations of open Brayton systems under reactivity insertion accidents (a) Temperature of turbine Inlet and outlet, (b) Output power and conversion efficiency
Fig. 9. Normalized comparison of output power and efficiency variations of different thermoelectric conversion systems(a) Output power, (b) Steady-state efficiency
Table 1. Key parameters of SAIRS-C heat pipe reactor
View tableView in ArticleTable 1. Key parameters of SAIRS-C heat pipe reactor
参数名称
Parameter name
数值
Value
参数名称
Parameter name
数值
Value
堆芯高度Core height / m 0.42 热管数量Number of heat pipes 60 燃料棒数数目Number of fuel rods 180 工作流体Working fluid 钠Na 燃料芯块密度Fuel core block density / kg∙m-3 12 710 热管材料Heat pipe material SS316 燃料芯块外径Fuel core block outer diameter / mm 13.9 热管外径Heat pipe outer diameter / Dhpw∙mm-1 15.0 燃料包壳外径Fuel cladding outer diameter / mm 15.0 热管壁厚Heat pipe wall thickness / dwall∙mm-1 0.4 氦气隙厚度Helium gap thickness / mm 0.15 液环厚度Liquid ring thickness / dliquid∙mm-1 0.6 气隙换热系数
Air gap heat transfer coefficient / W∙K-1∙m-2
5 800.0 隔热层壁厚
Wall thickness of insulation layer / cm
0.27 额定热功率Rated thermal power / kW 500.0 吸液芯孔隙度Suction core porosity / ε 0.69 BeO控制棒数目Number of BeO control rods 27 蒸发段长度Evaporation section length / Lhpe∙m-1 0.42 反射层半径Reflective layer radius / cm 24.0 绝热段长度Length of adiabatic section / Lhpa∙m-1 1.84 六角形活性区半径
Hexagonal active zone radius / cm
14.94 冷凝段长度
Length of condensing section / Lhpc∙m-1
1.23 基体温度反应性系数
Substrate temperature reactivity coefficient / $∙K-1
-0.001 吸液芯厚度
Thickness of liquid absorption core / dwick∙mm-1
0.2 燃料温度反应性系数
Fuel temperature reactivity coefficient / $∙K-1
-0.000 8 冷凝段换热系数
Heat transfer coefficient of condensing section / hhpc∙(W∙K-1∙m-2)-1
2 150 与环境换热系数
Heat transfer coefficient with environment
/ henvir∙(W∙K-1∙m-2)-1
100 与热管换热系数
Heat transfer coefficient with heat pipe
/ hfhp∙(W∙K-1∙m-2)-1
7 000.0
Table 2. Key parameters of semiconductor thermoelectric conversion system
View tableView in ArticleTable 2. Key parameters of semiconductor thermoelectric conversion system
参数
Parameters
稳态值
Steady state value
参数
Parameters
稳态值
Steady state value
发电模块数量Number of power generateon modules / NTE 20 000 外部负载电阻External load resistance
/ Rload∙Ω-1
12.7×10-3 Seebeck效应系数Seebeck effect factor
/ α∙(V∙K-1)-1
5.01×10-4 冷热端等效热导Equivalent thermal conduct-ivity at the hot and cold ends / KTE∙(W∙K-1)-1 0.027 6 模块内部电阻Module internal resistance / RPN∙Ω-1 13.553×10-3 冷热端换热面积Hot and cold end heat exchange area / Ac∙m-2 3.477
Table 3. Key parameters of stirling and thermoelectric conversion systems
View tableView in ArticleTable 3. Key parameters of stirling and thermoelectric conversion systems
参数
Parameters
稳态值
Steady state value
参数
Parameters
稳态值
Steady state value
加热腔温度
Heating chamber temperat-ure / K
1 065.6 冷凝腔温度
Condensation chamber temperature / K
300.0 总输出功率
Total output power / kW
163.5 运行平均压力
Operating average pressure / MPa
4.13 系统效率
System efficiency / %
43.1 运行频率
Operating frequency / Hz
41.72
Table 4. Key parameters of an open Brayton thermoelectric conversion system
View tableView in ArticleTable 4. Key parameters of an open Brayton thermoelectric conversion system
参数
Parameters
稳态值
Steady state value
参数
Parameters
稳态值
Steady state value
压缩机入口压力
Compressor inlet pressure / MPa
0.098 3 压缩机出口压力
Compressor outlet pressure / MPa
0.485 4 压缩机入口温度
Compressor inlet temperature / K
288.15 压缩机出口温度
Compressor outlet temperature / K
482.97 气轮机入口压力
Gas turbine inlet pressure / MPa
0.484 4 气轮机出口压力
Gas turbine outlet pressure / MPa
0.106 1 气轮机入口温度
Gas turbine inlet temperature / K
846.57 气轮机出口温度
Gas turbine outlet temperature / K
599.67 输出功率
Output power / kW
88.1 系统效率
System efficiency / %
18.9
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Pan WU, Yu ZHU, Zeyu OUYANG, Jianqiang SHAN, Xiao YAN. Characteristics of reactivity insertion accident of heat pipe reactors using different thermoelectric conversion systems[J]. NUCLEAR TECHNIQUES, 2024, 47(11): 110603
Paper Information
Category: NUCLEAR ENERGY SCIENCE AND ENGINEERING
Received: Mar. 12, 2024
Accepted: --
Published Online: Jan. 2, 2025
The Author Email: Jianqiang SHAN (SHANJianqiang)
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