Tracking algorithms for multi-hexagonal assemblies (2D and 3D)

We find that all the fluxes in 2D and fluxes in the outer pin (3D) are converging to their 3rd decimal places, in both the modules EXCELT and NXT(+HX7). For other regions 3D fluxes, in general, are converging to their first decimal places. To improve convergence of fluxes, we plan to analyze more lattices in future and study some of the reasons behind convergence.