MGXS Bootstrapping#3965

Merged

paulromano merged 40 commits into

openmc-dev:developfrom

jtramm:bootsrap_mgxs

Jul 22, 2026

Commits on Jun 9, 2026

Bootstrap material-wise MGXS with weight windows; fix two random ray bugs

John Tramm
and
claude
committed

Commits on Jun 10, 2026

Add shielded-pocket example and MGXS bootstrap regression test

John Tramm
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claude
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Compare quantitative results in MGXS bootstrap regression test

John Tramm
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claude
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Make full bootstrap test chain bit-reproducible; use NNDC references

John Tramm
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claude
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Add relative dead band to weight window comparisons

John Tramm
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claude
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Harden weight window dead band; move tolerance to constants.h

John Tramm
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claude
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Polish for review: versionadded, comment wording, clang-format

John Tramm
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claude
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Simplify bootstrap regression test to the standard harness pattern

John Tramm
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claude
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Test the complete bootstrap workflow; center the example sphere

John Tramm
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claude
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Enclose example sphere in a vacuum box for uniform ray sampling

John Tramm
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claude
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Slim unit tests to argument validation; fix comment grammar

John Tramm
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claude
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Remove unit tests for weight_windows_file argument validation

John Tramm
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claude
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docs edits
jtramm
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fixed ww unit test that used weight windows. Changed seed to prevent negative tallies.
John Tramm
committed

Commits on Jul 2, 2026

Merge branch 'develop' into pr/jtramm/3965
paulromano
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Small updates
paulromano
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Allow passing a Settings object to convert_to_multigroup

John Tramm
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claude
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Rework convert_to_multigroup settings customization; address review comments

John Tramm
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claude
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Commits on Jul 7, 2026

Remove redundant weight windows path handling in convert_to_multigroup

John Tramm
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claude
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Commits on Jul 8, 2026

Remove weight_windows_file argument in favor of settings.weight_windows_file

John Tramm
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claude
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Drop redundant method= from doc examples (material_wise is the default)

John Tramm
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Default convert_to_multigroup method to the one its settings were built for

John Tramm
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Declare the recorded MGXS generation method in Settings.__init__

John Tramm
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claude
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Commits on Jul 17, 2026

Resolve convert_to_multigroup settings by layering user overrides onto defaults

John Tramm
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claude
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Clarify that create_fission_neutrons is a surrogate-method default, not forced

John Tramm
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Turn on weight windows if `weight_windows_file` is specified (#4007)

paulromano
authored and
John Tramm
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Rely on weight_windows_file implying weight windows are enabled

John Tramm
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claude
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Merge remote-tracking branch 'upstream/develop' into bootsrap_mgxs
John Tramm
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Condense the settings parameter docstring to the essential contract

John Tramm
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claude
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Test that an explicit weight_windows_on=False rides along with the file

John Tramm
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claude
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Commits on Jul 21, 2026

Small edits
paulromano
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One test simplification
paulromano
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Divide by the dead-banded upper bound in the split count

John Tramm
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claude
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Accept Settings attributes as keyword arguments in convert_to_multigroup

John Tramm
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claude
committed

Commits on Jul 22, 2026