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Fixed a bug in plotting cross sections with S(a,b) data #3558

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Merged
paulromano merged 1 commit into from
Sep 3, 2025
Merged

Fixed a bug in plotting cross sections with S(a,b) data #3558

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16 changes: 8 additions & 8 deletions openmc/plotter.py
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Original file line number Diff line number Diff line change
Expand Up @@ -413,7 +413,8 @@ def _calculate_cexs_nuclide(this, types, temperature=294., sab_name=None,

# Prep S(a,b) data if needed
if sab_name:
sab = openmc.data.ThermalScattering.from_hdf5(sab_name)
sab = openmc.data.ThermalScattering.from_hdf5(
library.get_by_material(sab_name, data_type='thermal')['path'])
# Obtain the nearest temperature
if strT in sab.temperatures:
sabT = strT
Expand Down Expand Up @@ -640,23 +641,22 @@ def _calculate_cexs_elem_mat(this, types, temperature=294.,
sab = openmc.data.ThermalScattering.from_hdf5(
library.get_by_material(sab_name, data_type='thermal')['path'])
for nuc in sab.nuclides:
sabs[nuc] = library.get_by_material(sab_name,
data_type='thermal')['path']
sabs[nuc] = sab_name
else:
if sab_name:
sab = openmc.data.ThermalScattering.from_hdf5(sab_name)
sab = openmc.data.ThermalScattering.from_hdf5(
library.get_by_material(sab_name, data_type='thermal')['path'])
for nuc in sab.nuclides:
sabs[nuc] = library.get_by_material(sab_name,
data_type='thermal')['path']
sabs[nuc] = sab_name

# Now we can create the data sets to be plotted
xs = {}
E = []
for nuclide in nuclides.items():
name = nuclide[0]
nuc = nuclide[1]
sab_tab = sabs[name]
temp_E, temp_xs = calculate_cexs(nuc, types, T, sab_tab, cross_sections,
sab_name = sabs[name]
temp_E, temp_xs = calculate_cexs(nuc, types, T, sab_name, cross_sections,
ncrystal_cfg=ncrystal_cfg
)
E.append(temp_E)
Expand Down