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유한요소법에 의한 경수로용 핵연료집합체의 낙하충격 해석
윤경호(K-H Yoon),안창기(C-K An),이강희(K-H Lee),송기남(K-N Song) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
The drop impact analysis of a fuel assembly for pressurized water reactor (PWR) power plant is executed by finite element analysis method. The used commercial FE codes are the ANSYS and LS-DYNA3D. The analysis results are compared with the previous experimental results. The impact force results differed from the analysis condition depending on how many fuel rods slipped down to the bottom nozzle. And the joint and connection parts between components of a fuel assembly are very important for determining the stiffness of it. The fuel assembly experienced an impact force of approximately 95.65kN when dropped from a height 25 ㎜ with the fuel rods off the bottom nozzle. The developed finite element model and analysis procedure will be useful tool for evaluating the stiffness and strength of a fuel assembly.