Internal Boundary Surfaces Card Examples (CO2E)

~Internal Boundary Surfaces Card
2,
East,
17,17,1,57,20,41,
West,
38,38,1,57,20,41,

~Internal Boundary Surfaces Card
4,
file,east_internal.dat,
file,west_internal.dat,
file,top_internal.dat,
file,bottom_internal.dat,