Modeling of Neutron Shield Pane

How we will model Neutron Shield Pane in reactor core… is there any command for defining polar plan or any other idea to to model it…? Imae attached here is from Beavrs Benchmark…

The BEAVRS OpenMC model can be found here:

In particular, here’s the file where the neutron shield is created:

okay thank you @paulromano got it…