Dhaka University Journal of Applied Science & Engineering

• Kazi Kamrun Naher Ononna
  Department of Nuclear Engineering, University of Dhaka, Dhaka-1000, Bangladesh
• Md. Towhid Hossain
  Department of Nuclear Engineering, University of Dhaka, Dhaka-1000, Bangladesh
• Md. Mahidul Haque Prodhan
  Department of Nuclear Engineering, University of Dhaka, Dhaka-1000, Bangladesh

Spacer grids are essential for enhancing the mechanical performance of the fuel rods in the nuclear reactor core. Spacer grids are always in systematic square shape. It is significant to enhance the features of the grid with vanes since the maximum coolant mixing and less pressure drop must be permitted to the thermal hydraulic model. Earlier, researchers had used Computational Fluid Dynamics (CFD) in 3D Reynolds Averaged Navier-Stokes (RANS) and k-ϵ turbulence model. Korean Atomic Energy Research Institute (KAERI) performed CFD evaluation of a (5x5) bundle of rods experiment and their simulations were completed in OECD/NEA CFD Standard application. According to KAERI output, the turbulence features in spacer grid geometries in a PWR (pressurized water reactor) is offered and the impact of the results were evaluated with the help of ANSYS CFX in this article. A reactor stream feature and three dissimilar vane arrangements are simulated and average thermo-fluid dynamic parameters are assessed. The simulations are performed with the CFD code of CFX 15.

1. Mimouni, S. et al. ―A Second Order Turbulence Model Based on a Reynolds Stress Approach for Two-Phase Boiling Flow and Application to Fuel Assembly Analysis‖, Nucl. Eng. Des., 240, 2010, pp. 2225-2232