A three-dimensional numerical study on steady state was designed for a safety relief valve
using several openings and inlet pressures. The ANSYS-CFX® commercial code was used …

As a safe, clean, efficient and low-carbon energy, nuclear power is gaining increasing
interest in global energy development. However, working in the extremely harsh …

In this study, we experimentally investigate the flow field characteristics in a fuel rod bundle
with a spacer grid and split-type mixing vanes at a low Reynolds number of 14, 000. Time …

In order to achieve high-fidelity PIV measurement for cross flow in rod bundles, the
measurement approach with the two-dimensional (2D) PIV has been optimized …

Grid-to-rod fretting (GTRF) in pressurized water reactors is a flow-induced vibration
phenomenon that results in wear and fretting of the cladding material on fuel rods. GTRF is …

In reactor fuel assembly in PWR, spacer grids with mixing vanes are used in rod bundles to
enhance flow mixing and heat transfer. Thus, the spacer grids have significant influence on …

Cross flow and lateral pressure drop downstream a split-type mixing vane spacer grid in a
5× 5 rod bundle were experimentally measured by particle image velocimetry (PIV) and …

This study examined the capabilities and limitations of steady Reynolds-Averaged Navier–
Stokes (RANS) approach for pressurized water reactor (PWR) rod bundle problems, based …

Swirling flow induced by the twist vanes can enhance the heat transfer in the rod-bundle fuel
assembly. In order to investigate accuracy of the k-ε models in predicting the swirling flow in …

Axial and cross flow downstream a split-type mixing vane spacer grid in a 5× 5 rod bundle
are measured with particle image velocimetry (PIV) at sub-channel Reynolds number (Re …