乏燃料干法贮存系统贮罐模块力学特性数值研究

袁波; 陈康; 文青龙; 徐世佳; 程呈; 聂照宇; 徐晓

doi:10.13832/j.jnpe.2024.S1.0152

乏燃料干法贮存系统贮罐模块力学特性数值研究

doi: 10.13832/j.jnpe.2024.S1.0152

袁波^{1, 2, 3,},
陈康^{1, 3},
文青龙^{1, 2, 3, ,},
徐世佳^{1, 3},
程呈⁴,
聂照宇⁴,
徐晓⁴

1.
重庆大学能源与动力工程学院核工程与核技术系，重庆，400044
2.
重庆大学低品位能源利用技术及系统教育部重点实验室，重庆，400044
3.
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
4.
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

详细信息

作者简介:
袁　波（1985—），男，副教授，主要从事反应堆热工水力研究，E-mail: boyuanyuan@cqu.edu.cn

通讯作者:
文青龙， E-mail: qlwen@cqu.edu.cn

中图分类号: TL334
计量
- 文章访问数: 17
- HTML全文浏览量: 6
- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2023-10-21
- 修回日期: 2024-02-26
- 刊出日期: 2024-06-15

Numerical Study on Mechanical Characteristics of Storage Canister Module for Spent Fuel Dry Storage System

Yuan Bo^{1, 2, 3
,},
Chen Kang^{1, 3},
Wen Qinglong^{1, 2, 3
, ,},
Xu Shijia^{1, 3},
Cheng Cheng⁴,
Nie Zhaoyu⁴,
Xu Xiao⁴

1.
Department of Nuclear Engineering, School of Energy and Power Engineering, Chongqing University, Chongqing, 400044, China
2.
Key Laboratory of Low-Grade Energy Utilization Technologies & Systems, Chongqing University, Chongqing, 400044 , China
3.
Laboratory of Liangjiang New Energy (Nuclear Energy and Power), Chongqing, 400044, China
4.
State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment, Shenzhen, 518172, China

摘要

摘要: 乏燃料干法贮存是处理乏燃料的重要方法，而贮存过程中燃料产生的高温会引起极大的热应力，可能导致材料的永久变形和破坏，研究乏燃料贮存系统中贮罐模块的力学特性具有重要的意义。以乏燃料干法贮存系统中的贮罐模块为研究对象，建立1/2缩比模型，基于计算的贮罐模块温度分布开展了正常贮存工况下贮罐模块的力学特性数值研究，为乏燃料干法贮存系统的缩比试验提供数据支撑。结果表明：①格架应力的总体趋势呈现为中心高、四周低，顶部和底部部分区域存在较大的剪切应力，铝制支撑块总体应力较小，贮存容器在容器壳体和顶部盖板的交界处存在较大应力；②在最低环境温度工况下燃料格架、铝制支撑块和贮存容器最大应力分别为253.71、89.99 、55.35 MPa，各部件应力均未超过法规限值。
- 乏燃料干法贮存 /
- 贮罐模块 /
- 缩比模型 /
- 力学特性
Abstract: Spent fuel dry storage is an important method for handling spent fuel, however, the high temperature generated by spent fuel may cause great thermal stress, thereby leading to permanent deformation and damage. Therefore, it is of great significance to study the mechanical properties of storage canister module in spent fuel storage system. In this paper, the storage canister module in the spent fuel dry storage system is taken as the research object, and a 1/2 scaled model of the storage canister module is established. Based on the calculated temperature distribution of the storage canister module, the numerical study of the mechanical characteristics of the storage canister module under normal storage conditions is carried out, which provides data support for the scale test of the spent fuel dry storage system. The results show that: ①The stress in grid is high in center and low around, and there is a large shear stress in the top and bottom parts, while the overall stress of the aluminum support block is small, and there is a large stress at the junction of the canister shell and the top cover plate; ②Under the lowest ambient temperature condition, the maximum stress of the grid, the aluminum support block and the storage canister is 253.71 MPa, 89.99 MPa and 55.35 MPa, respectively. The stress of each component does not exceed the limits.
- Spent fuel dry storage /
- Storage canister module /
- Scaled model /
- Mechanical characteristics

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图 1 物理模型

Figure 1. Physical Model

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图 2 温度载荷

Figure 2. Contouring of Temperature Load

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图 3 贮存容器的应力强度

Figure 3. Contouring of the Storage Container Stress Intensity

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图 4 贮存容器沿顶盖和壳体交界处的应力强度

Figure 4. Storage Canister Stress Intensity along the Junction of the Top Cover and Shell

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图 5 格架上的正应力分布

Figure 5. Contouring of Normal Stress Distribution on Grid

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图 6 格架在x方向沿中心轴线的正应力

Figure 6. Normal Stress of the Grid along the Central Axis in the x-direction

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图 7 格架上的切应力分布

Figure 7. Contouring of Shear Stress Distribution on Grid

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图 8 格架的应力强度

Figure 8. Contouring of Stress Intensity of Grid

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图 9 格架沿中心轴线的应力强度

Figure 9. Stress Intensity of Grid along the Central Axis

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图 10 铝支撑块的应力强度

Figure 10. Contouring of Stress Intensity of Aluminum Support Block

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图 11 铝支撑块沿轴向的应力强度

Figure 11. Stress Intensity of Aluminum Support Block in the Axial Direction

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表 1 热膨胀计算结果

Table 1. Calculation Results of Thermal Expansion

编号	计算对象1	计算对象2	方向	初始间隙/mm	膨胀后间隙/mm
1	燃料模拟体	燃料格架	径向	1.00	1.08
2	燃料模拟体	贮存容器	轴向	36.00	35.42
3	铝支撑块	贮存容器	径向	2.00	1.32
4	燃料格架	贮存容器	轴向	36.00	34.28

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表 2 网格敏感性计算结果

Table 2. Calculation Results of Mesh Sensitivity

编号	计算模型	网格数量	最大应力/MPa
1	贮存容器	32474	53.10
2	贮存容器	63355	55.35
3	贮存容器	99015	54.21
4	燃料格架	41202	255.26
5	燃料格架	81750	253.71
6	燃料格架	120990	255.58
7	铝支撑块	138852	77.30
8	铝支撑块	275500	89.99
9	铝支撑块	418760	83.21

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表 3 网格信息

Table 3. Mesh Information

编号	计算模型	网格数	节点数	最大偏斜率
1	贮存容器	63355	292945	0.547
2	燃料格架	81750	570370	0.496
3	铝支撑块	275500	1424288	0.744

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