# Differentiate\_depletable\_mats to universe **URL:** \ **Category:** New Ideas\ **Created:** [March 20, 2025, 1:43pm UTC](https://openmc.discourse.group/t/differentiate-depletable-mats-to-universe/5350 "2025-03-20T13:43:16Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![cjwiguna](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/cjwiguna/32/3728_2.png) [@cjwiguna](https://openmc.discourse.group/u/cjwiguna)\ **Post date:** [March 24, 2025, 10:34am UTC](https://openmc.discourse.group/t/differentiate-depletable-mats-to-universe/5350/3 "2025-03-24T10:34:50Z")
Greetings @tjlaboss, Sorry for the late reply, and thanks for the references. While I’m still researching for interesting way of grouping / homogenizing the fuel in full core, from last week i tried to be very simple; I separate the fuel materials according to this scheme: ![image](https://global.discourse-cdn.com/free1/uploads/openmc/original/2X/7/7b18656f33f7c833b998b6320c47cebb6f0dd0bd.png) It’s akin to the null homogenization in Dr. Boyd’s work, except I homogenized it even further by grouping the symmetrically-equivalent assemblies together (to force the symmetry, otherwise the result may be asymmetrical, like the case below) > [@Asymmetrical profile for symmetrical PWR core](https://openmc.discourse.group/t/asymmetrical-profile-for-symmetrical-pwr-core/3402): > > Hello everyone, I am studying an LWR core (with symmetry present of course) but the radial power profile is severely asymmetrical. I know this is not due to histories (as I have run 2,500 batches with 100,000 particles per batch). the profile I am getting is shown here. the boundary conditions are vacuum on the outermost boundaries. I have checked to see if the core universe is correctly input as symmetric. any guesses what might be the reason? any help is appreciated EDIT: any id… --- _[View the full topic](https://openmc.discourse.group/t/differentiate-depletable-mats-to-universe/5350)._