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Delta tracking#3971

Open

nuclearkevin wants to merge 80 commits into

openmc-dev:developopenmc-dev/openmc:developfrom

nuclearkevin:delta_trackingnuclearkevin/openmc:delta_trackingCopy head branch name to clipboard

Conversation Commits80 (80)Checks Files changed

Open

Delta tracking#3971
nuclearkevin wants to merge 80 commits into
openmc-dev:developfrom
nuclearkevin:delta_tracking

Commits

Commits on Jul 10, 2026

Squash delta tracking commits.
nuclearkevin
committed
Fix non-vacuum BCs.
nuclearkevin
committed
Make non-vacuum BCs more robust.
nuclearkevin
committed
Allow for the import of majorant cross sections from CSV files.
nuclearkevin
committed
Missing setting.
nuclearkevin
committed
Turn ptable sampling on for delta tracking.
nuclearkevin
committed
Begin majorant refactor.
nuclearkevin
committed
Finish the "new" majorant implementation.
nuclearkevin
committed
Better error messages.
nuclearkevin
committed
Fix issues with URR cross sections. Make error messages better
nuclearkevin
committed
Prep for photon majorants.
nuclearkevin
committed
Photon majorants & delta tracking for photon transport.
nuclearkevin
committed
Errors for settings unsupported by delta tracking (for now).
nuclearkevin
committed
Compute majorants for all materials contained in a universe.
nuclearkevin
committed
Fix delta tracking photon loop.
nuclearkevin
committed
Minor changes.
nuclearkevin
committed
Fix bug with universe majorants & reset majorants when finalizing a simulation.
nuclearkevin
committed
Support distrib densities.
nuclearkevin
committed
Rename delta tracking functions.
nuclearkevin
committed
Support delta tracking with a shared secondary bank.
nuclearkevin
committed
Remove CSV majorant cross sections.
nuclearkevin
committed
Revert to most conservative URR treatment.
nuclearkevin
committed
Honestly, I don't know anymore...
nuclearkevin
committed
Refactor history-based delta tracking to prepare for event-based.
nuclearkevin
committed
First cut of event-based transport. Works for neutrons
nuclearkevin
committed
Fixes for event-based delta tracking photon transport.
nuclearkevin
committed
More shuffling, add some extra division comments.
nuclearkevin
committed
Remove unnecessary cross section calculation event on particle initialization.
nuclearkevin
committed
Forgot the coord reset.
nuclearkevin
committed
Use FP_REL_PRECISION when advancing to boundaries.
nuclearkevin
committed
Fix grid lookup.
nuclearkevin
committed
Fix majorants, again...
nuclearkevin
committed
Remove unused code.
nuclearkevin
committed
More cleanup.
nuclearkevin
committed
More cleanup.
nuclearkevin
committed
URR fix.
nuclearkevin
committed
Have majorants conform to OpenMC's indexing approach. Also add a timer for majorant construction.
nuclearkevin
committed
Remove ascii file writes.
nuclearkevin
committed
Pretty formatting.
nuclearkevin
committed
Restrict delta tracking tallies to collision estimators.
nuclearkevin
committed
Remove unnecessary coord reset.
nuclearkevin
committed
Clean up combined estimate for k.
nuclearkevin
committed
Clean up majorant and remove random duplicate code.
nuclearkevin
committed
Shouldn't need this going into a boundary crossing.
nuclearkevin
committed
Remove more duplicate flagging.
nuclearkevin
committed
More cleanup.
nuclearkevin
committed
Round trip delta_tracking alongside the majorant build time in the SP.
nuclearkevin
committed
Remove event limit.
nuclearkevin
committed
Delta tracking theory.
nuclearkevin
committed
Test round tripping the delta tracking setting.
nuclearkevin
committed
Fix distributed density majorant bug.
nuclearkevin
committed
More majorant fixes.
nuclearkevin
committed
Test for distributed densities with delta tracking.
nuclearkevin
committed
Add history-based and event-based tests with/without photons.
nuclearkevin
committed
Revert "Remove unnecessary coord reset."
nuclearkevin
committed
Regold to account for coord fix.
nuclearkevin
committed
Fix periodic boundary conditions.
nuclearkevin
committed
Add tests for delta tracking boundary conditions.
nuclearkevin
committed
Only need the tolerance on the translational periodic BC.
nuclearkevin
committed
Update tests to account for the removal of duplicate code & consolidation.
nuclearkevin
committed
Fix gold inputs.
nuclearkevin
committed
Final review.
nuclearkevin
committed
Style changes.
nuclearkevin
committed
URR grid index fix.
nuclearkevin
committed
More fixes for rare bugs that happen when finding a grid index.
nuclearkevin
committed
Catch void majorants, clean up majorant killswitch.
nuclearkevin
committed
Build majorant in parallel with OpenMP threads.
nuclearkevin
committed
Style changes.
nuclearkevin
committed
Consistent BC tolerance application.
nuclearkevin
committed
Advancing in time.
nuclearkevin
committed
Catch void materials.
nuclearkevin
committed
Apply more maxes to URRs.
nuclearkevin
committed
Minor improvements, document statepoint changes.
nuclearkevin
committed
Apply suggestions from code review

nuclearkevin
and
pshriwise
committed
Keep the linter happy.
nuclearkevin
committed
Documentation.
nuclearkevin
committed
Address non-majorant review.
nuclearkevin
committed
Address majorant comments.
nuclearkevin
committed
Formatting.
nuclearkevin
committed
Fix copy-paste error.
nuclearkevin
committed

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