NUCLEAR TECHNIQUES, Volume. 47, Issue 1, 010602(2024)
Design and analysis of passive residual heat removal system for a new megawatt and compact nuclear power plant
Figures & Tables(17)
Fig. 1. Schematic of passive residual heat removal system (a) Overall diagram of the nuclear power plant, (b) Emergency cooling compartment profile
Fig. 2. Curves of decay heat power versus reactor operating time (color online)
Fig. 5. Nephogram comparison of temperature and velocity distribution with (a) and without (b) baffle
Fig. 6. Comparison of axial temperature and velocity distribution with (a) and without (b) baffle
Fig. 7. Nephogram comparison of temperature and velocity distribution with baffle extension lengths of (a) 200 mm, (b) 400 mm
Fig. 8. Nephogram comparison of temperature and velocity distribution with baffle opening widths of (a) 40 mm, (b) 80 mm, (c) 160 mm
Fig. 11. Temperature distribution diagram of inner wall of adiabatic layer
Table 1. Main parameters of megawatt high efficiency and compact new marine nuclear power plant
View tableView in ArticleTable 1. Main parameters of megawatt high efficiency and compact new marine nuclear power plant
参数名称Parameter 参数值Value 反应堆功率Reactor power / MW 3.5 燃料类型Fuel UN 堆内热管根数Number of heat pipes 390 热管结构材料Heat pipe structural materials ODS-MA754 热管工质类型Heat pipe working fluid type 钾Potassium 热管吸液芯类型Type of heat pipe wick 丝网Wire-mesh screen 热管外径Outer diameter of heat pipe / mm 21.5 热管壁厚度Heat pipe wall thickness / mm 1.0 热管间中心距离Center distance between heat pipes / mm 28.2 热管稳态运行温度Steady state operating temperature of heat pipe / ℃ 773.45
Table 2. Comparison of different turbulence models
View tableView in ArticleTable 2. Comparison of different turbulence models
湍流模型Turbulence model Realizable k-e 2 layer Standard low-Rek-e V2F k-e SST k-ω 质量流量Mass flow / kg·s-1 0.424 0.421 0.422 0.424 流体温度Fluid temperature / ℃ 113.9 110.7 110.9 111.4
Table 3. Results of different lengths
View tableView in ArticleTable 3. Results of different lengths
围板下部长度Lower length of baffle / mm 0 200 400 质量流量Mass flow / kg·s-1 0.238 8 0.200 1 0.144 4 流体温度最大值Maximum fluid temperature / ℃ 300 304 309 围板进口温度Baffle inlet temperature / ℃ 206.1 178.5 159.8 围板进出口平均温差
Average temperature difference between the inlet and outlet of the baffle / ℃
66.91 87.95 121.90
Table 4. Results of different widths
View tableView in ArticleTable 4. Results of different widths
进出口宽度
Inlet and outlet width / mm
40 80 160 质量流量Mass flow / kg·s-1 0.238 8 0.238 7 0.241 9 流体温度最大值
Maximum fluid temperature / ℃
300 300 299
Table 5. Results of axial lengths
View tableView in ArticleTable 5. Results of axial lengths
轴向长度Axial lengths / mm 140 150 160 170 质量流量Mass flow / kg·s-1 0.397 0.414 0.421 0.426 流体温度最大值Maximum fluid temperature / ℃ 沸腾Boiling 305 288 273 绝热层最高温度Maximum temperature of the adiabatic layer / ℃ 854 804 765 727 绝热层平均温度Average temperature of the adiabatic layer / ℃ 812 763 722 684
Table 6. Results of ambient temperatures
View tableView in ArticleTable 6. Results of ambient temperatures
环境温度
Ambient temperatures / ℃
5 10 15 20 25 质量流量
Mass flow / kg·s-1
0.421 0.424 0.427 0.430 0.433 流体温度最大值
Maximum fluid
temperature / ℃
288 291 294 297 300 绝热层最高温度
Maximum temperature
of the adiabatic layer / ℃
765 766 767 769 771
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Leqi YUAN, Hexin WU, Junli GOU, Jianqiang SHAN. Design and analysis of passive residual heat removal system for a new megawatt and compact nuclear power plant[J]. NUCLEAR TECHNIQUES, 2024, 47(1): 010602
Paper Information
Category: Research Articles
Received: Jun. 29, 2023
Accepted: --
Published Online: Mar. 7, 2024
The Author Email: GOU Junli (苟军利)
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