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논문 기본 정보

자료유형
학술저널
저자정보
김진수 (한국과학기술원) 윤정환 (한국과학기술원) 김효찬 (한국원자력연구원) 이성욱 (한국원자력연구원)
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제53권 제10호
발행연도
2021.10
수록면
3,379 - 3,397 (19page)
DOI
https://doi.org/10.1016/j.net.2021.04.025

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In this study, a multi-physics modeling method was developed to analyze a nuclear fuel rod's thermomechanical behavior especially for high temperature anisotropic creep deformation during ballooningand burst occurring in Loss of Coolant Accident (LOCA). Based on transient heat transfer and nonlinearmechanical analysis, the present work newly incorporated the nuclear fuel rod's special characteristicswhich include gap heat transfer, temperature and burnup dependent material properties, and especiallyfor high temperature creep with material anisotropy. The proposed method was tested through variousbenchmark analyses and showed good agreements with analytical solutions. From the validation studywith a cladding burst experiment which postulates the LOCA scenario, it was shown that the presentdevelopment could predict the ballooning and burst behaviors accurately and showed the capability topredict anisotropic creep behavior during the LOCA. Moreover, in order to verify the anisotropic creepmethodology proposed in this study, the comparison between modeling and experiment was made withisotropic material assumption. It was found that the present methodology with anisotropic creep couldpredict ballooning and burst more accurately and showed more realistic behavior of the cladding.

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