I found some small discrepancies in the neutron spectrums between openmc and mcnp with very simple models. For example, in fixed source calculations with a pure H1 model, the differences between the two codes are obviously greater than the statistical errors in the low energy region ([1E-3, 1e-1]ev at 300K). Not sure if this is expected or of concern. @paulromano
openmc-validate-neutron-physics H1 -x path/to/mcnp_endfb71/xsdir -e 1000 -p 100000000 -s 80c
I found some small discrepancies in the neutron spectrums between openmc and mcnp with very simple models. For example, in fixed source calculations with a pure H1 model, the differences between the two codes are obviously greater than the statistical errors in the low energy region ([1E-3, 1e-1]ev at 300K). Not sure if this is expected or of concern. @paulromano