Hello, everyone!
Now l am calculating the C5G7 benchmark,
However, the transport cross section calculated by openmc has a big error with that given by C5G7. After comparison, it is found that P0 scattering calculated by openmc has a big error with that given by C5G7.
Why does this happen? My absorption cross section and my fission cross section are not much different. Anyone else in the same situation？
I have carefully read the scatter matrix XS of openmc, and I wonder whether the P0 modified section of openmc includes anisotropy calculation, while C5G7 does not.
I hope someone can answer my questions.
Thanks and regards,
lichw