WARNING: Cannot reflect particle 15 off surface in a lower universe

Hello Every One ,
I’m making PWR AP1000 Core model my code is look clean and the plot is looking same i want , but when i run it i get this error

attached along my input so if any one have clue how to fix this please help

Thanks in advance

materials.xml (3.78 KB)

plots.xml (227 Bytes)

settings.xml (342 Bytes)

geometry.xml (7.2 KB)

The error message is telling you that it doesn’t make sense to have a reflective boundary internally in the model. That is, the only place a boundary condition should occur is at the outermost boundary. In your case, you have a reflective boundary condition on surface 16, a z-cylinder with radius 188, but it really should be on surface 17 which is a z-cylinder with a greater radius.

Hope that helps!

Best,
Paul

Dear Prof.Paul,
Thanks a lot for your fast response ,I changed the boundary condition to reflective in surface 17 as you told me but I’m still having this error , I’m using version 0.8.0
attached below picture of the error the I’m getting

It appears the problem is now in how the reflective z-planes are used. Since the boundary conditions can only be defined on the root universe (which in your case consists of cells 100 and 1011), this means that you should change the definition of cell 100 so that is has region="-16 10 -11". Then, remove the region="…" attribute on cells 11, 12, 13, and 90.

Best,
Paul

Dear Prof.Paul ,
I changed the geometry as you suggested to me but I’m still having an error attached an image for the error and my edited geometry file
Thanks in advance

Ahmed k Madani

geometry.xml (7.15 KB)