Several estimation methods based on round-robin experiments and/or actual plant experiences have been used to estimate e rosion by liquid drop impingement (LDI). However, in recent years, due to developments on computer technology, it is poss ible to utilize large scale computational analyses. This study proposes a method for the evaluation of LDI erosion by me ans of computational fracture analysis using results (diameters, velocity, or speed of drops) of fluid dynamics analysis....
英字タイトル:
Evaluation of Liquid Droplet Impingement Erosion by Micro-scale Fracture Analysis

Abstract This paper presents steady-state Eulerian thermal analysis of welds using moving coordinates that has been reported as computationally very efficien t method. This method requires much less CPU time than conventional Lagrangian method in which heat source moves in computational domain. This kind of Euleri an analysis can be done conveniently by using computational fluid dynamics code. To show the availability of this method, it is applied to a groove weld of a core shroud in a boiling water react...
英字タイトル:
High Speed Thermal Analysis on Moving Heat Source using CFD code

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