I’m trying to set up a complicated geometry. The problem is setting up the cells, not building a core from them. Each cell is hexagonal, filled with a paste of fuel in sodium, above a paste of reflector in sodium, and penetrated by a hexagonal lattice of 271 coolant tubes. The lattice permeates the entire core instead of one being confined separately in each element. And the lattice is rotated 30 degrees with respect to the elements. May I send somebody the geometry file to get some advice?