A simplified evaluation method for the nuclear power plant structures subjected to impulsive forces caused by the floating debris and tornado missiles is proposed. In this study, the maximum shock response displacement is obtained on the assumption that the impulse of the collision is constant. Then the maximum shock response displacement is used to evaluate structural damage by the classical elastic analysis. To verify the proposed method, impact analysis with FEM was performed. Comparisons of the ma...
英字タイトル:
An analysis method for maximum response of structures subjected to impulsive forces 仲村 岳 Gaku NAKAMURA Non member

Nuclear piping has various kinds of thermal fatigue failure modes. Main causes of thermal loads are structural responses to fluid temperature changes during plant operation. These phenomena have complex mechanisms and so many patterns, that their problems still occur even though well-known issues. To prevent thermal fatigue due to above thermal loads, the JSME guideline is adopted. Both thermal load and fatigue failure mechanism have been investigated and summarized into the knowledgebase. Based on abo...
英字タイトル:
Development of thermal fatigue evaluation methods of piping systems