Irradiation-induced swelling of U-Mo fuel for heat-pipe reactor under high temperature

Table 1. Design parameters of fuel
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Table 1. Design parameters of fuel
参数Parameter 值Value
富集度Enrichment / % 93.1
外径External diameter / mm 110
内径Internal diameter / mm 40
长度Length / mm 250
热管外径Outer diameter of heat pipe / mm 12.7

Table 2. Comparison between irradiation swelling data and model prediction value

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Table 2. Comparison between irradiation swelling data and model prediction value

材料 Material	燃耗 Burnup / %	裂变密度 Fission density / cm^-3	辐照温度 Irradiation temperature / K	实测肿胀 Measured value / %	预测肿胀 Predicted value / %
U-13.4Mo	0.22	0.80×10²⁰	1 073	1.00	0.42
U-10Mo	0.27	1.05×10²⁰	850	0.50	0.56
U-10Mo	0.36	1.43×10²⁰	1 089	1.80	0.76
U-10Mo	0.38	1.48×10²⁰	1 111	1.50	0.78
U-7.5Mo	0.38	1.57×10²⁰	1 072	2.30	0.83
U-7.5Mo	0.39	1.61×10²⁰	1 105	2.40	0.85
U-13.4Mo	0.47	1.65×10²⁰	973	2.00	0.88

Table 3. Calculation value of temperature

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Table 3. Calculation value of temperature

参数Parameter	本文This thesis	文献[9] Ref.[9]	文献[10] Ref.[10]
峰值温度Maximum temperature / K	1 096.1	1 096.0	1 097.7
最低温度Minimum temperature/ K	1 074.2	1 074.0	1 076.1
最大温差Temperature difference / K	21.9	22.0	21.6

Table 4. Calculation results of deformation (thermal expansion only)

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Table 4. Calculation results of deformation (thermal expansion only)

参数Parameter	本文This thesis	文献[9] Ref.[9]	文献[10] Ref.[10]
总最大变形Total maximum deformation / mm	4.94	4.95	—
轴向最大变形Axial maximum deformation / mm	4.84	—	—
径向最大变形Radial maximum deformation / mm	1.05	0.92	1.36
最大热应力Maximum thermal stress / MPa	52.7	53.3	—

Table 5. Calculation results of deformation with consideration of thermal expansion and irradiation swelling

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Table 5. Calculation results of deformation with consideration of thermal expansion and irradiation swelling

参数 Parameters	热膨胀和辐照肿胀 Thermal expansion and irradiation swelling	仅热膨胀 Thermal expansion only	偏差 Deviation / %
总最大变形Total maximum deformation / mm	5.28	4.94	6.88
轴向最大变形Axial maximum deformation / mm	5.17	4.84	6.82
径向最大变形Radial maximum deformation / mm	1.13	1.05	7.62
最大应力Maximum stress / MPa	57.4	52.7	8.91

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Qinwen YAO, Xitong GUAN, Quan CHENG, Jigao DAI, Yuanfang ZOU, Xiaojun HE, Aimin ZHANG. Irradiation-induced swelling of U-Mo fuel for heat-pipe reactor under high temperature[J]. NUCLEAR TECHNIQUES, 2024, 47(11): 110601

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