NUCLEAR TECHNIQUES, Volume. 46, Issue 9, 090601(2023)
Influence of the pitch-to-diameter ratio on the circumferential non-uniformity of annular fuel outer temperature distribution
Figures & Tables(16)
Fig. 1. Cross-section of the fuel rod bundle (a) Square component, (b) Hexagonal component
Fig. 2. Component computing area of fuel assembly (a) Square component, (b) Hexagonal component
Fig. 3. Mesh partitioning of the components(a) Square component, (b) Hexagonal component
Fig. 4. The central channel temperature of a square component distributed along the circumference (a) 0.25 m from the entrance, (b) 0.50 m from the entrance, (c) 0.75 m from the entrance
Fig. 5. Normalized coefficient of nonuniformity of the center channel of the square component
Fig. 6. The side channel temperature of a square component distributed along the circumference (a) 0.25 m from the entrance, (b) 0.50 m from the entrance, (c) 0.75 m from the entrance
Fig. 7. Normalized coefficient of nonuniformity of the side channel of the square component
Fig. 8. Angular channel temperature of a square component distributed along the circumference (a) 0.25 m from the entrance, (b) 0.50 m from the entrance, (c) 0.75 m from the entrance
Fig. 9. Normalized coefficient of nonuniformity of the angular channel of the square component
Fig. 10. Central channel temperature of a hexagonal component distributed along the circumference (a) 0.25 m from the entrance, (b) 0.50 m from the entrance, (c) 0.75 m from the entrance
Fig. 11. Side channel temperature of a hexagonal component distributed along the circumference (a) 0.25 m from the entrance, (b) 0.50 m from the entrance, (c) 0.75 m from the entrance
Fig. 12. Angular channel temperature of a hexagonal component distributed along the circumference (a) 0.25 m from the entrance, (b) 0.50 m from the entrance, (c) 0.75 m from the entrance
Fig. 13. Normalized coefficient of nonuniformity of temperature distribution of hexagonal components (a) Central channel, (b) Side channel, (c) Angular channel
Table 1. Ring fuel geometry design parameters
View tableView in ArticleTable 1. Ring fuel geometry design parameters
几何尺寸参数 Geometric dimension parameters 数值 Numeric value / mm 内包壳内径 Inner diameter of the internal cladding 8.33 内包壳外径 Outer diameter of the internal cladding 9.48 燃料芯块内径 Fuel pellet inner diameter 9.60 燃料芯块外径 Fuel pellet outer diameter 13.75 外包壳内径 Inner diameter of the outer cladding 13.88 外包壳外径 Outer diameter of the outer cladding 15.52 有效加热长度 Effective heating length 1 000
Table 2. Physical properties of the material
View tableView in ArticleTable 2. Physical properties of the material
间隙
Interval
芯块
Fuel pellet
包壳
Cladding
材料Material 氦气
Helium
烧结
UO2 sintered
uranium dioxide
Zr-4合金
Zr-4 alloy
密度Density / kg·m-3 2.54 10 460 6 512 导热系数
Thermal conductivity
/ W·(m·K)-1
0.24 4.26 16.74 比热容
Specific heat capacity
/ J·(kg·K)-1
5 191 307 328 黏度Viscosity / Pa∙s 3.78×10-5
Table 3. Operating parameters for a single fuel rod model
View tableView in ArticleTable 3. Operating parameters for a single fuel rod model
参数
Parameter
参数值
The parameter value
燃料棒平均线功率
Average line power density of fuel rods
/ kW·m-1
74.3 入口温度
Temperature at the entrance / K
567.87 参考压力Reference pressure / MPa 15.5 总流量Total traffic / kg·s-1 0.783 57
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Fulin ZENG, Mao TANG, Pengcheng ZHAO, Zhaocai XIANG. Influence of the pitch-to-diameter ratio on the circumferential non-uniformity of annular fuel outer temperature distribution[J]. NUCLEAR TECHNIQUES, 2023, 46(9): 090601
Paper Information
Category: Research Articles
Received: Oct. 20, 2022
Accepted: --
Published Online: Oct. 8, 2023
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