Finite element analysis of the mechanical behavior of a nuclear fuel assembly spacer grid
| Autor: | Seong-Ki Lee, Kyong-bo Eom, Youngik Yoo, Kyoung-Hong Kim |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Nuclear and High Energy Physics
Materials science genetic structures 020209 energy 02 engineering and technology 01 natural sciences 010305 fluids & plasmas Condensed Matter::Materials Science Dimple Component (UML) 0103 physical sciences 0202 electrical engineering electronic engineering information engineering medicine General Materials Science Safety Risk Reliability and Quality Waste Management and Disposal Nuclear fuel business.industry Mechanical Engineering Stiffness Structural engineering Finite element method Nuclear Energy and Engineering Buckling Drag Spring (device) medicine.symptom business |
| Zdroj: | Nuclear Engineering and Design. 352:110179 |
| ISSN: | 0029-5493 |
| Popis: | The purpose of this study is to develop a finite element model that accurately describes the mechanical behavior of a spacer grid. The spacer grid is the most important component of a nuclear fuel assembly and supports the fuel rod with a structurally sufficient buckling strength. Therefore, the development of a reliable spacer grid model is essential to evaluate the mechanical integrity of a nuclear fuel assembly. To achieve this objective, a three-dimensional finite element model that can simulate the static and dynamic mechanical behaviors of a spacer grid was developed in this study. To simulate the exact mechanical properties of the spacer grid cell, the parameter values required for the model were determined by conducting a fuel rod drag test and spacer grid spring/dimple stiffness test. Finally, a spacer grid static compression test and dynamic impact test were performed according to the gap size of the spacer grid cell, and the model was verified by comparing the test and analysis results. The results obtained using the developed spacer grid finite element model agreed well with the mechanical test results, and it was confirmed that both the static and dynamic mechanical characteristics of the model were accurately simulated by the proposed model. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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