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Delta tracking - #3971

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nuclearkevin wants to merge 103 commits into

openmc-dev:developfrom

nuclearkevin:delta_tracking

Open

Delta tracking#3971
nuclearkevin wants to merge 103 commits into
openmc-dev:developfrom
nuclearkevin:delta_tracking

Commits on Oct 10, 2026
- Squash delta tracking commits.
  nuclearkevin
  committed
  9b973f4
- Fix non-vacuum BCs.
  nuclearkevin
  committed
  5c3f121
- Make non-vacuum BCs more robust.
  nuclearkevin
  committed
  05555ab
- Allow for the import of majorant cross sections from CSV files.
  nuclearkevin
  committed
  0563bf9
- Missing setting.
  nuclearkevin
  committed
  df8cd44
- Turn ptable sampling on for delta tracking.
  nuclearkevin
  committed
  983edf6
- Begin majorant refactor.
  nuclearkevin
  committed
  0e1a8f8
- Finish the "new" majorant implementation.
  nuclearkevin
  committed
  dd7be37
- Better error messages.
  nuclearkevin
  committed
  09e2514
- Fix issues with URR cross sections. Make error messages better
  nuclearkevin
  committed
  3d644c0
- Prep for photon majorants.
  nuclearkevin
  committed
  024357b
- Photon majorants & delta tracking for photon transport.
  nuclearkevin
  committed
  a4b3fa4
- Errors for settings unsupported by delta tracking (for now).
  nuclearkevin
  committed
  4d0683f
- Compute majorants for all materials contained in a universe.
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  committed
  3c0bf11
- Fix delta tracking photon loop.
  nuclearkevin
  committed
  0f686ce
- Minor changes.
  nuclearkevin
  committed
  7fba98d
- Fix bug with universe majorants & reset majorants when finalizing a simulation.
  nuclearkevin
  committed
  4d657af
- Support distrib densities.
  nuclearkevin
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  e555af7
- Rename delta tracking functions.
  nuclearkevin
  committed
  04700c5
- Support delta tracking with a shared secondary bank.
  nuclearkevin
  committed
  84a8325
- Remove CSV majorant cross sections.
  nuclearkevin
  committed
  1a5a42f
- Revert to most conservative URR treatment.
  nuclearkevin
  committed
  1e70322
- Honestly, I don't know anymore...
  nuclearkevin
  committed
  14146f1
- Refactor history-based delta tracking to prepare for event-based.
  nuclearkevin
  committed
  9b2647e
- First cut of event-based transport. Works for neutrons
  nuclearkevin
  committed
  d8c17c5
- Fixes for event-based delta tracking photon transport.
  nuclearkevin
  committed
  6b3291b
- More shuffling, add some extra division comments.
  nuclearkevin
  committed
  a82774d
- Remove unnecessary cross section calculation event on particle initialization.
  nuclearkevin
  committed
  d09665b
- Forgot the coord reset.
  nuclearkevin
  committed
  99425bf
- Use FP_REL_PRECISION when advancing to boundaries.
  nuclearkevin
  committed
  24948c9
- Fix grid lookup.
  nuclearkevin
  committed
  9dfc096
- Fix majorants, again...
  nuclearkevin
  committed
  72a9447
- Remove unused code.
  nuclearkevin
  committed
  779e67d
- More cleanup.
  nuclearkevin
  committed
  6ee344c
- More cleanup.
  nuclearkevin
  committed
  4233145
- URR fix.
  nuclearkevin
  committed
  b21c09d
- Have majorants conform to OpenMC's indexing approach. Also add a timer for majorant construction.
  nuclearkevin
  committed
  51f9322
- Remove ascii file writes.
  nuclearkevin
  committed
  984cfbd
- Pretty formatting.
  nuclearkevin
  committed
  33cdaa6
- Restrict delta tracking tallies to collision estimators.
  nuclearkevin
  committed
  a5b864a
- Remove unnecessary coord reset.
  nuclearkevin
  committed
  d487a0b
- Clean up combined estimate for k.
  nuclearkevin
  committed
  b93340c
- Clean up majorant and remove random duplicate code.
  nuclearkevin
  committed
  9e6257f
- Shouldn't need this going into a boundary crossing.
  nuclearkevin
  committed
  b5f289b
- Remove more duplicate flagging.
  nuclearkevin
  committed
  e3e2fcc
- More cleanup.
  nuclearkevin
  committed
  2af34bb
- Round trip delta_tracking alongside the majorant build time in the SP.
  nuclearkevin
  committed
  7623b0b
- Remove event limit.
  nuclearkevin
  committed
  1630244
- Delta tracking theory.
  nuclearkevin
  committed
  2fb42af
- Test round tripping the delta tracking setting.
  nuclearkevin
  committed
  254a441
- Fix distributed density majorant bug.
  nuclearkevin
  committed
  7bc3ac9
- More majorant fixes.
  nuclearkevin
  committed
  9304736
- Test for distributed densities with delta tracking.
  nuclearkevin
  committed
  8c1b624
- Add history-based and event-based tests with/without photons.
  nuclearkevin
  committed
  682dc42
- Revert "Remove unnecessary coord reset."
  nuclearkevin
  committed
  77d9c1b
- Regold to account for coord fix.
  nuclearkevin
  committed
  033e79d
- Fix periodic boundary conditions.
  nuclearkevin
  committed
  5e569ea
- Add tests for delta tracking boundary conditions.
  nuclearkevin
  committed
  2c54e5c
- Only need the tolerance on the translational periodic BC.
  nuclearkevin
  committed
  c578560
- Update tests to account for the removal of duplicate code & consolidation.
  nuclearkevin
  committed
  b40845b
- Fix gold inputs.
  nuclearkevin
  committed
  c51754c
- Final review.
  nuclearkevin
  committed
  91ee633
- Style changes.
  nuclearkevin
  committed
  b181a59
- URR grid index fix.
  nuclearkevin
  committed
  8e63fa5
- More fixes for rare bugs that happen when finding a grid index.
  nuclearkevin
  committed
  05ebf04
- Catch void majorants, clean up majorant killswitch.
  nuclearkevin
  committed
  6afc8f5
- Build majorant in parallel with OpenMP threads.
  nuclearkevin
  committed
  fdf420a
- Style changes.
  nuclearkevin
  committed
  c1b3144
- Consistent BC tolerance application.
  nuclearkevin
  committed
  2e9ae22
- Advancing in time.
  nuclearkevin
  committed
  8d6a85f
- Catch void materials.
  nuclearkevin
  committed
  874c8c6
- Apply more maxes to URRs.
  nuclearkevin
  committed
  4e620ab
- Minor improvements, document statepoint changes.
  nuclearkevin
  committed
  cd09544
- Apply suggestions from code review
  
  nuclearkevin
  and
  pshriwise
  committed
  b7f8983
- Keep the linter happy.
  nuclearkevin
  committed
  4d2db23
- Documentation.
  nuclearkevin
  committed
  62fd44d
- Address non-majorant review.
  nuclearkevin
  committed
  2b261ed
- Address majorant comments.
  nuclearkevin
  committed
  0409b7e
- Formatting.
  nuclearkevin
  committed
  c33c026
- Fix copy-paste error.
  nuclearkevin
  committed
  385baa8
- Fix the two-component estimator.
  nuclearkevin
  committed
  6fe1e36
- Regold MG survival biasing test for the 2-component fix.
  nuclearkevin
  committed
  9aa41b5
- Style changes.
  nuclearkevin
  committed
  2c0ee70
- Regold for fixed 2-component combined estimator.
  nuclearkevin
  committed
  eb318c7
- Now that it works, clean it up
  nuclearkevin
  committed
  40019ce
- Rename gold file directories.
  nuclearkevin
  committed
  8f45491
- Add to settings.xml file description.
  nuclearkevin
  committed
  c85410b
- Use openmc::vector.
  nuclearkevin
  committed
  936faf1
- Address remaining review comments.
  nuclearkevin
  committed
  6f10108
- We do need this.
  nuclearkevin
  committed
  736fe49
- Add a check for surface filters.
  nuclearkevin
  committed
  fd3c067
- Catch bug in DAGMC/MOAB.
  nuclearkevin
  committed
  9c741dd
- Please the linter.
  nuclearkevin
  committed
  cded46b
- Update to account for inlining of electron/positron rxns.
  nuclearkevin
  committed
  38aeaf4
- Regold delta tracking photon tests to account for inlining of electron/positron rxns.
  nuclearkevin
  committed
  e156196
- Roll the version string forward to 0.15.5
  nuclearkevin
  committed
  9a13787
- Roll the version string to 0.16.1.
  nuclearkevin
  committed
  1558bd5
- Style changes
  nuclearkevin
  committed
  660c1ec
- Style changes.
  nuclearkevin
  committed
  e0c053e
- Minor rabbit fixes.
  nuclearkevin
  committed
  6bd672f
- Fix S(a,B) interpolation.
  nuclearkevin
  committed
  4712aa4
- Fix majorants.
  nuclearkevin
  committed
  a18f555
- NaN guard and regold for photon majorant fixes.
  nuclearkevin
  committed
  29fc88f

Commits

Commits on Oct 10, 2026