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Determine whether nuclides are fissionable in volume calc mode #3047

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merged 3 commits into from
Jun 20, 2024
Merged

Determine whether nuclides are fissionable in volume calc mode #3047

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16a329c
Determine whether nuclides are fissionable in volume calc mode
paulromano Jun 19, 2024
1e25d15
Add test for sample_external_source in volume calc mode
paulromano Jun 19, 2024
9208c97
Implement break suggestion from @pshriwise
paulromano Jun 19, 2024
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13 changes: 13 additions & 0 deletions src/nuclide.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,19 @@ Nuclide::Nuclide(hid_t group, const vector<double>& temperature)
read_attribute(group, "atomic_weight_ratio", awr_);

if (settings::run_mode == RunMode::VOLUME) {
// Determine whether nuclide is fissionable and then exit
int mt;
hid_t rxs_group = open_group(group, "reactions");
for (auto name : group_names(rxs_group)) {
if (starts_with(name, "reaction_")) {
hid_t rx_group = open_group(rxs_group, name.c_str());
read_attribute(rx_group, "mt", mt);
if (is_fission(mt)) {
fissionable_ = true;
break;
}
}
}
return;
}

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8 changes: 7 additions & 1 deletion tests/unit_tests/test_lib.py
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Expand Up @@ -963,7 +963,8 @@ def test_sample_external_source(run_in_tmpdir, mpi_intracomm):
model.settings.source = openmc.IndependentSource(
space=openmc.stats.Box([-5., -5., -5.], [5., 5., 5.]),
angle=openmc.stats.Monodirectional((0., 0., 1.)),
energy=openmc.stats.Discrete([1.0e5], [1.0])
energy=openmc.stats.Discrete([1.0e5], [1.0]),
constraints={'fissionable': True}
)
model.settings.particles = 1000
model.settings.batches = 10
Expand Down Expand Up @@ -993,3 +994,8 @@ def test_sample_external_source(run_in_tmpdir, mpi_intracomm):
assert p1.wgt == p2.wgt

openmc.lib.finalize()

# Make sure sampling works in volume calculation mode
openmc.lib.init(["-c"])
openmc.lib.sample_external_source(100)
openmc.lib.finalize()