Impact Analysis for the Egg-Crate Structure of a Nuclear Fuel Assembly by Using FEM

Kee Nam Song; Sang Hoon Lee; Jae Yong Kim

doi:10.4028/www.scientific.net/KEM.353-358.2668

Paper Titles

Increasing Damping Ratios in a Tuned Liquid Damper Using Damping Bars
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Influence of Tapered Cross Section on Fatigue Damage of Cladding Fasteners on Side Faces of Tall Buildings
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Influence of Non-Gaussian Local Wind Pressures on Fatigue Damage of a Cladding Fastener on a Side Face of a Tall Building
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Stress Analysis of Automotive Engine Cover under Static and Vibration Load
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Impact Analysis for the Egg-Crate Structure of a Nuclear Fuel Assembly by Using FEM
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Structural Response and Behavior Analyses of Steel Joint Components at Elevated Temperatures
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Numerical Simulation of Deformation and Strength of Reinforced Concrete Slabs under Thermal-Mechanical Loads
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Fracture Characteristics of a Hybrid Composite Joint Beam for the Tilting Car Body under Static and Fatigue Transverse Loads
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A Simple Spline Integral Equation Method for Circular Plates with Variable Thickness
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 353-358Impact Analysis for the Egg-Crate Structure of a...

Impact Analysis for the Egg-Crate Structure of a Nuclear Fuel Assembly by Using FEM

Abstract:

A spacer grid assembly is one of the main structural components of the nuclear fuel assembly of a Pressurized light Water Reactor (PWR). The spacer grid assembly supports and aligns the fuel rods, guides the fuel assemblies past each other during a handling and, if needed, sustains lateral seismic loads. The ability of a spacer grid assembly to resist these lateral loads is usually characterized in terms of its dynamic and static crush strengths, which are acquired from tests. In this study, a finite element analysis on the dynamic crush strength of spacer grid assembly specimens is carried out. Comparisons show that the analysis results are in good agreement with the test results within an 8 % difference range. Therefore, we could predict the crush strength of a spacer grid assembly in advance, before performing the dynamic buckling test. And also a parametric study on the crush strength of a spacer grid assembly is carried out by adjusting the weld penetration depth for a sub-sized spacer grid, which also shows a good agreement between the test and analysis results.