For MCNP6 mcpl2ssw currently sets ssb[10] (cf. sswmcpl.c) to isurf. But when when we read ssw files, we take abs(ssb[10]) so it hints that perhaps we should fill some info into the sign of ssb[10] as well.
@EsbenKlinkby can you try to investigate that we are not missing something important by never setting the sign bit of ssb[10] when creating files for MCNP6.
For MCNP6 mcpl2ssw currently sets ssb[10] (cf. sswmcpl.c) to isurf. But when when we read ssw files, we take abs(ssb[10]) so it hints that perhaps we should fill some info into the sign of ssb[10] as well.
@EsbenKlinkby can you try to investigate that we are not missing something important by never setting the sign bit of ssb[10] when creating files for MCNP6.