基于辐射-对流-传导热流固耦合模型的乏燃料贮运容器传热特性与优化研究

龙腾; 章贵和; 金刚; 邓小云; 孔小飞; 金挺; 熊光明

doi:10.13832/j.jnpe.2021.05.0057

基于辐射-对流-传导热流固耦合模型的乏燃料贮运容器传热特性与优化研究

doi: 10.13832/j.jnpe.2021.05.0057

龙腾^1,,
章贵和¹,
金刚^2, ,,
邓小云¹,
孔小飞¹,
金挺¹,
熊光明¹

1.
中广核工程有限公司核电安全监控技术与装备国家重点实验室，广东深圳，518172
2.
生态环境部核与辐射安全中心，北京，102445

详细信息

作者简介:
龙　腾（1991—），男，硕士，现主要从事核岛设备力学分析方面的研究工作，E-mail: longyiteng123@126.com

通讯作者:
金　刚，E-mail: jingang@chinansc.cn

中图分类号: TL334
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- 被引次数: 0
出版历程
- 收稿日期: 2020-08-05
- 修回日期: 2020-10-26
- 刊出日期: 2021-09-30

Study on Heat Transfer Characteristics and Optimization of Spent Fuel Storage and Transportation Containers Based on Heat-Fluid-Solid Coupled Model for Radiation, Convection and Conduction

1.
State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment, China Nuclear Power Engineering Co., Ltd., Shenzhen, Guangdong, 518172, China
2.
Nuclear and Radiation Safety Center, Ministry of Ecological Environment, Beijing, 102445, China

摘要

摘要: 基于辐射-对流-传导的热流固耦合计算流体动力学（CFD）模型，对比不同放置状态、环境温度、容器内部填充介质和有无环形翅片情况下，各部件最高温度、自然对流流速、外表面辐射及对流功率的变化。结果表明，水平放置有利于强化环形翅片的对流传热；环境温度每升高10℃，燃料包壳温度增加6.5℃，外壁面温度增加8.3℃；燃料篮内部填充物由中子吸收板或铝块更换为氦气后，容器整体导热性能明显降低，容器内部温度升高，但容器壁面温度基本不变；如不考虑太阳暴晒，环形翅片可增加对流传热，使得容器整体温度降低；如考虑太阳暴晒，环形翅片会增加太阳暴晒能量的吸收，使容器整体温度反而比光滑壁面容器高；基于代数分析法和漫灰表面模型对CFD辐射模型进行验证，CFD辐射功率和公式法计算结果基本一致。
- 乏燃料贮运容器 /
- 放置状态 /
- 环境温度 /
- 翅片 /
- 优化
Abstract: Based on the heat-fluid-solid coupled computational fluid dynamics (CFD) model for radiation,convection and conduction, this paper compares the changes in maximum temperature, natural convection flow rate, outer surface radiation and convection power of various parts under different storage status and ambient temperatures, with different packing media in the containers, and with or without annular fin. According to the study results, horizontal arrangement improves the convection heat transfer on the annular fin; each time the ambient temperature increases by 10 ℃, the fuel cladding temperature and outer wall surface temperature increase by 6.5 ℃ and 8.3℃, respectively; when the medium filling the fuel basket is changed from neutron absorption plate or aluminum block to helium, the overall heat transfer capacity of the container deteriorates dramatically, with the temperature inside the container increasing and the outer wall surface temperature remaining almost unchanged; with the solar radiation ignored, a annular fin will help improve convection heat transfer and thus decrease the overall temperature of the container, otherwise, the annular fin absorbs more solar energy, causing the overall temperature of the container to exceed that of a container with smooth wall; and the CFD radiation power is basically same as the calculation results gained in the formula method, as shown in the verification of the CFD radiation model based on the algebraic analysis method and diffuse gray surface model.
- Spent fuel container /
- Storage status /
- Ambient temperature /
- Fin /
- Optimization

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图 1 1/4简化模型及边界条件

Figure 1. Simplified 1/4 Model and Boundary Conditions

下载: 全尺寸图片幻灯片

图 2 各部件最高温度随环境温度变化规律

Figure 2. Variation of Maximum Temperature of Components with Ambient Temperature

下载: 全尺寸图片幻灯片

表 1 燃料组件等效导热率与当地温度的关系^[5]

Table 1. Relationship between Equivalent Thermal Conductivity of Fuel Assembly and Local Temperature

方向	当地温度/℃	导热率/[W·(m·K)⁻¹]
轴向	93	0.946
	149	0.998
	204	1.050
	316	1.137
	427	1.233
径向	81	0.347
	181	0.477
	283	0.671
	388	0.922
	599	1.480

下载: 导出CSV

表 2 不同放置方式的传热特性

Table 2. Heat Transfer Characteristics under Different Storage Modes

放置方式	竖直	水平
燃料包壳最高温度/K	490.98	484.50
中子屏蔽棒最高温度/K	409.68	407.03
侧表面最高温度/K	393.53	392.94
顶面最高温度/K	369.46	373.80
总辐射功率/W	11867	11235
总对流功率/W	7053	7686

下载: 导出CSV

表 3 不同燃料篮内部填充方式下传热特性

Table 3. Heat Transfer Characteristics under Different Filling Modes of Fuel Basket

格架填充物	基准填充方式	备选方案1	备选方案2
燃料包壳最高温度/K	490.98	596.37	617.80
中子屏蔽棒最高温度/K	409.68	409.37	417.97
侧表面最高温度/K	393.53	393.69	402.99
顶面最高温度/K	369.46	369.27	370.98
辐射功率/W	11867	11868	11506
对流功率/W	7054	7046	6839

下载: 导出CSV

表 4 无暴晒下翅片对传热特性的影响

Table 4. Influence of Fins on Heat Transfer Characteristics without Solar Radiation

有无环形翅片	有环形翅片	无环形翅片
燃料包壳最高温度/K	475.72	479.07
中子屏蔽棒最高温度/K	390.16	397.61
侧表面最高温度/K	374.21	382.72
顶面最高温度/K	349.25	352.40
辐射功率/W	8062	8498
对流功率/W	4645	4196

下载: 导出CSV

表 5 有暴晒下翅片对传热特性的影响

Table 5. Influence of Fins on Heat Transfer Characteristics with Solar Radiation

有无环形翅片	有环形翅片	无环形翅片
燃料包壳最高温度/K	490.98	488.13
中子屏蔽棒最高温度/K	409.68	408.93
侧表面最高温度/K	393.56	393.53
顶面最高温度/K	369.46	368.54
辐射功率/W	11867	10714
对流功率/W	18920	16202

下载: 导出CSV

表 6 辐射验证工况

Table 6. Radiation Verification Conditions

工况序号	暴晒	环境温度/℃	环形翅片
1	有	38	有
2	有	20	有
3	有	30	有
4	有	50	有
5	有	60	有
6	无	38	有
7	无	38	无
8	有	38	无

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表 7 有无暴晒下光滑壁面和带翅片壁面的辐射模型验证

Table 7. Verification of Radiation Models for Smooth Wall and Finned Wall with and without Solar Radiation

工况	F_1→3	Q_1+2→3/W	CFD结果/W	相对误差/%
1	0.53	11105	10317	7.64
2	0.53	9761	9111	7.13
3	0.53	10748	10005	7.42
4	0.53	11737	10867	8.01
5	0.53	12163	11220	8.40
6	0.53	7573	8062	−6.07
7	0.92	7802	8499	−8.20
8	0.92	9845	10714	−8.11

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参考文献(7)

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