NUCLEAR TECHNIQUES, Volume. 46, Issue 5, 050601(2023)
Design and neutronics characteristics analysis of the fuel assembly in gas-cooled fast reactor
Figures & Tables(14)
Fig. 1. Structural diagram of the block-type FA (a) Radial, (b) Axial
Fig. 3. Change of FA burnup with different diameter values of the coolant channels(a) keff value changes with burnup days, (b) keff value changes with burnup depth
Fig. 4. Change of FA burnup with different numbers of the coolant channels
Fig. 5. Change of FA burnup with different pitch-to-diameter ratios
Fig. 6. Change of FA burnup with different cladding thickness of the coolant channels (a) and different wrapper thickness (b)
Table 1. Parameters of the block-type assembly
View tableView in ArticleTable 1. Parameters of the block-type assembly
组件参数Parameters 值Values 单组件功率Power / MW 2 组件对边距Edge-to edge distance / cm 21.035 冷却剂体积份额Coolant fraction / % 30 钚同位素份额Plutonium fraction/ wt% 30 冷却剂通道数Number of coolant channels 5R（61） 冷却剂通道直径Diameter of coolant channels / mm 15 栅距比Pitch-to diameter ration 1.74 包壳厚度Clad thickness / mm 0.75 组件盒厚度Wrapper thickness / mm 2
Table 2. Lifetime of FA with different plutonium fractions
View tableView in ArticleTable 2. Lifetime of FA with different plutonium fractions
钚同位素份额Plutonium fraction / wt% 25 26 27 28 30 组件寿期/EFPD Lifetime/EFPD 6 514 6 960 7 400 7 858 8 516 转换比Conversion ratio 寿期初
Beginning of cycle
0.721 7 0.712 1 0.703 4 0.693 7 0.676 3 寿期末
End of cycle
0.773 7 0.768 9 0.770 1 0.764 8 0.756 3
Table 3. FA lifetime with different diameter values of the coolant channels
View tableView in ArticleTable 3. FA lifetime with different diameter values of the coolant channels
冷却剂通道直径Diameter / mm 12 15 18 21 燃料装载量Fuel loading / kg 63 97 139 188 组件对边距Edge-to-edge distance / cm 16.894 21.035 25.191 29.340 组件寿期/EFPD Lifetime/ EFPD 5 433 7 968 10 930 14 165
Table 4. FA lifetime with different numbers of the coolant channels
View tableView in ArticleTable 4. FA lifetime with different numbers of the coolant channels
冷却剂通道数量Number of the coolant channels 4R (37)* 5R (61) 6R (91) 7R (127) 组件寿期/EFPD Lifetime/EFPD 8 035 7 968 7 931 8 098 径向功率峰因子Radial power peaking factor 1.019 0 1.012 4 1.009 3 1.006 9
Table 5. FA life with different pitch-to-diameter ratios
View tableView in ArticleTable 5. FA life with different pitch-to-diameter ratios
栅距比P/D 1.90 1.74 1.61 1.51 冷却剂体积份额
Coolant fraction / %
25 30 35 40 组件寿期/EFPD
Lifetime/EFPD
8 747 7 968 7 111 6 245
Table 6. FA life with different cladding thickness of the coolant channels and different wrapper thickness
View tableView in ArticleTable 6. FA life with different cladding thickness of the coolant channels and different wrapper thickness
包壳厚度Clad thickness / mm 0.50 0.75 1.00 1.25 组件寿期/EFPD lifetime / EFPD 8 109 7 968 7 817 7 669 组件盒厚度Wrapper thickness / mm 1.0 2.0 3.0 4.0 组件寿期/EFPD Lifetime / EFPD 8 232 7 968 7 712 7 464
Table 7. Cell peak temperature with different pitch-to-diameter ratios
View tableView in ArticleTable 7. Cell peak temperature with different pitch-to-diameter ratios
P/D 1.90 1.74 1.61 1.51 冷却剂体积份额Coolant fraction / % 25 30 35 40 燃料最高温度Peak temperature / K 1 468 1 444 1 423 1 407 径向功率峰因子限值Power peak factor limit 1.003 7 1.019 5 1.034 8 1.047 0
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Mengfei ZHOU, Guoming LIU, Xiaodong HUO. Design and neutronics characteristics analysis of the fuel assembly in gas-cooled fast reactor[J]. NUCLEAR TECHNIQUES, 2023, 46(5): 050601
Paper Information
Category: Research Articles
Received: Jul. 20, 2022
Accepted: --
Published Online: Jun. 30, 2023
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