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논문 기본 정보

자료유형
학술대회자료
저자정보
Kyung-Ho Yoon (한국원자력연구원) Kang-Hee Lee (한국원자력연구원) Heung-Seok Kang (한국원자력연구원) Kee-Nam Song (한국원자력연구원)
저널정보
대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2004년도 재료 및 파괴부문 추계학술대회 및 파손방지기술 산학연 연합회 워크숍 논문집
발행연도
2004.8
수록면
149 - 159 (11page)

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The characterization tests (load vs. displacement curve) are conducted for the springs of Zirconium alloy spacer grids for advanced LWR fuel assembly. The tests are classified twofold; the strap-based test and the assembly-based test. The assembly-based test satisfies the in situ boundary conditions, which the spring has in the grid assembly. Our purpose to do the characterization test by the above two methods is to find out an appropriate assembly-based test method that fulfills the actual boundary conditions. The characterization test under the spacer grid assembly boundary condition is also conducted to investigate the actual behavior of the spring in core. The stiffness of the characteristic curve is smaller than that of the strap-wised boundary condition. This phenomenon may cause the strap slit condition. A spacer grid is constituted with horizontal and vertical strap. And their slit positions are differentiated with each other. It also affords the examination of the variation of the external load distribution in the grid spring. Localized regions of high stress and its values are analyzed, which may well be affected by the spring shape. By comparing the results of the test and FE analysis, it is concluded that the present assembly-based analysis model and procedure are reasonably conducted and can be used for the spring characterization in core. A guideline for the spring behavior is discussed to improve the mechanical integrity of the spring finally.

목차

Abstract
1. Introduction
2. Characterization Test
3. Finite Element Analysis
4. Comparison and Discussion
5. Concluding Remarks
Acknowledgement
References

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UCI(KEPA) : I410-ECN-0101-2010-550-003153399