Analysis of regularly perturbed lattices and reaction rate distributions from TIC experiments for X7 lattices

► We conducted analysis of TIC experiments on regularly perturbed lattice experiments using indigenously developed EXCEL, TRIHEX-FA and HEXPIN code system. ► Analysis uses diffusion iterative technique (DIT) method which iteratively adjusts the absorber cell cross sections. ► For simulation of dry lattice above the critical moderator height a suitable gamma boundary condition has been used. ► The calculated fission rate and activation reaction rate distributions are in good agreement with the experiments.