Deplete: Flux mode (mg-flux); faster collapse via SparseXSTable - #3980

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yrrepy wants to merge 10 commits into

openmc-dev:developfrom

yrrepy:microxs_mg-flux_faster-collapse_SparseXSTable_v2-Couple

Commits on Jun 24, 2026

Add group_xs C API for group-averaged cross sections
yrrepy
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a694b3c
Add Nuclide.group_xs Python binding
yrrepy
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81e033d
Build the group cross section table once for flux collapse
yrrepy
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d92af26
Add unit tests for the group_xs flux-collapse path
yrrepy
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5e0f004
Make from_multigroup_flux the multi-flux collapse engine
yrrepy
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1911ba4
Group Materials.deplete by energy and temperature
yrrepy
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0b5b807
Streamline the flux-collapse additions
yrrepy
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9aad1cc
Optional/Bonus: Cache per-temperature XS table in FluxCollapseHelper
yrrepy
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302e301
Avoid copying the whole flux batch in from_multigroup_flux
yrrepy
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30f5d1a

Commits on Jul 25, 2026

Merge branch 'develop' into microxs_mg-flux_faster-collapse_SparseXSTable_v2-Couple
GuySten
committed
0c92039