Unstructured Grids and the Multigroup Neutron Diffusion Equation
Figure 1
Discretization of a homogenized PHWR array of fuel channels for a core-level diffusion computation. Each square is a lattice-level cell comprising one fuel channel and the surrounding moderator.
(a) Coarse structured grid commonly used in diffusion codes such as in [9]. Each lattice cell is divided into a 2 2 grid for solving the neutron diffusion equation
(b) Discretization of the lattice cell using a fine unstructured grid as proposed in this work
