Static Strength Analysis of CANFLEX Fuel Bundle for CANDU 6 Reactor

Abstract

A static analysis, finite-element (FE) model was developed to simulate out-reactor fuel-string strength tests with use of the well-known, structural analysis computer code ABAQUS. The FE model takes into account the deflection of fuel elements, and stress and displacement in endplates subjected to hydraulic drag loads. It was adapted to the strength tests performed for CANFLEX 43-element bundles and the existing 37-element bundles. The FE model was found to be in good agreement with experiment results. With use of the FE model, static behavior of fuel bundle string, such as load transfer between ring elements, endplate rib effects, hydraulic drag load incurring plastic deformation in fuel string and high flow rate effects were investigated.