Create a X-type hexagonal lattice

User Support
1

Dear Developers and members of this group.

I am trying to model a small lead fast reactor as a part of a course in Monte Carlo methods.
The task is to make a comparison between Serpent and OpenMC.

My issue is that I need to create a X-type hexagonal lattice (two sides parallel to the x-axis) in order to model the core correctly. My fuel- and control assemblies are of X-type and they are later placed in the core in a Y-type mesh.

The standard hexagonal mesh in OpenMC seem to be a Y-type, but is it possible to rotate it 90 degrees in order to obtain a X-type? I did not find anything about this in the user manual so perhaps you could provide some assistance.

Kind regards,

Fredrik Dehlin
Royal Institute of Technology

2

Hi Fredrik,

My apologies for the delay in responding to you. Take a look at this example notebook which demonstrates how you can build a hexagonal lattice and then rotate it by 30 degrees to achieve the effect that you desire. Let me know if you have any specific questions about it.

Best regards,
Paul

3

Hi Paul!

Thank you for your example notebook. I totally understand how to rotate the lattice now.

Many thanks,
Fredrik