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논문 기본 정보

자료유형
학술대회자료
저자정보
김해란 (충남대학교) 이영신 (충남대학교) 이현승 (충남대학교) 박남규 (한전원자력연료)
저널정보
대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2010년도 추계학술대회 강연 및 논문 초록집
발행연도
2010.11
수록면
907 - 912 (6page)

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초록· 키워드

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Each cell of spacer grids support the fuel rods continuously to maintain the spacing between the fuel rods in a nuclear reactor core and minimize the lateral displacement of fuel rods during operation. Although numbers of spacer grids support a fuel rod, the vibration behavior still exist in reactor due to coolant flow. So it is important to understand the fuel rod vibration characteristics in details. Because the spacer grid numbers greatly effect the fuel rod vibration characteristics, it is also important to know the fuel rod vibration characteristics with different number of spacer grid support conditions. In this pacer, modal simulations on fuel rod were done using the workbench 12.0 program to get nature frequencies and mode shapes under different number of spacer grid conditions. In simulation, real form fuel rod and spacer grids were used and assume the fuel rod contact tightly with the spacer grids. The mesh was performed by ICEM program and verified quality of mesh with mesh quality histogram that high quality of mesh can improve the simulation results. As a simulation results, at two supports(bottom and top spacer grid) conditions nature frequency got the most small value. At three supports(bottom, top and mid spacer grid) and four supports(bottom, top and two mid) conditions, nature frequencies were similar which 3 times higher than two support condition. At five supports(bottom, top and three mid) and seven(bottom, top, three mid and two IFM) conditions, the nature frequencies were almost same and 3 times higher than three and four supports conditions.

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Abstract
1. Introduction
2. Analysis Model
3. Simulation Results and Discussion
4. Conclusions
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UCI(KEPA) : I410-ECN-0101-2012-550-003937968