Assembly-oriented reliability analysis method for the top-connection structure of a nuclear fuel assembly

Ying-Dong Liu

doi:10.1007/s41365-023-01247-7

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Assembly-oriented reliability analysis method for the top-connection structure of a nuclear fuel assembly

NUCLEAR ENERGY SCIENCE AND ENGINEERING | Updated：2023-08-14

- Assembly-oriented reliability analysis method for the top-connection structure of a nuclear fuel assembly
- Assembly-oriented reliability analysis method for the top-connection structure of a nuclear fuel assembly
- 核技术（英文版） 2023年34卷第6期文章编号：82
- Affiliations：
  
  1.School of Mechanical Engineering, Sichuan University, Chengdu 610065, China
  2.Innovation Method and Creative Design Key Laboratory of Sichuan Province, Chengdu 610065, China
- Author bio：
  
  liwenqiang@scu.edu.cn
- Funds：
  
  National Natural Science Foundation of China(52075350);Major Science and Technology Projects of Sichuan Province(2022ZDZX0001);Special City School Strategic Cooperation Project of Sichuan University and Zigong(2021CDZG-3)
- DOI：10.1007/s41365-023-01247-7
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Assembly-oriented reliability analysis method for the top-connection structure of a nuclear fuel assembly[J]. 核技术（英文版）, 2023, 34(6):82

Ying-Dong Liu, Wen-Qiang Li, Jia-Hao Chen, et al. Assembly-oriented reliability analysis method for the top-connection structure of a nuclear fuel assembly[J]. Nuclear Science and Techniques, 2023, 34(6):82
Assembly-oriented reliability analysis method for the top-connection structure of a nuclear fuel assembly[J]. 核技术（英文版）, 2023, 34(6):82 DOI： 10.1007/s41365-023-01247-7.

Ying-Dong Liu, Wen-Qiang Li, Jia-Hao Chen, et al. Assembly-oriented reliability analysis method for the top-connection structure of a nuclear fuel assembly[J]. Nuclear Science and Techniques, 2023, 34(6):82 DOI： 10.1007/s41365-023-01247-7.

摘要

Abstract

The nuclear fuel assembly is the core component of a nuclear reactor. In a pressurized water reactor fuel assembly, the top-connection structure connects the top nozzle to the guide thimble. Its performance reliability is essential for the stability of the nuclear fuel assembly. In this study, an assembly-oriented reliability analysis method for top-connection structures is presented by establishing an assembly-oriented top-connection structure parameter modeling method and a nonlinear contact gap and penetration correction method. A reliability model of the top-connection assembly structure, including multiple stochastic design variables, was constructed, and the overall reliability of the top-connection assembly structure was obtained via a Kriging model and Monte Carlo simulation. The acquired experimental data were consistent with real-world failure conditions, which verified the practicability and feasibility of the reliability analysis method proposed in this study.

关键词

Keywords

AssemblyTop-Connection StructureParametric ModelApproximation ModelStructural Reliability

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