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fixing expansion of elemental Ta bug - #3443

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paulromano merged 9 commits into
openmc-dev:developfrom
GuySten:ta180
Jun 18, 2025
Merged

paulromano merged 9 commits into
openmc-dev:developfrom
GuySten:ta180

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@GuySten

@GuySten GuySten commented Jun 15, 2025

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Description

This pr expand the element Ta correctly.
The expansion is dependent on the nuclear data available.
Ta180_m1 is converted to Ta180 if Ta180_m1 is missing from data.
If Ta180 is also missing it is converted to Ta181

Fixes #3382

Checklist

  • I have performed a self-review of my own code
  • I have run clang-format (version 15) on any C++ source files (if applicable)
  • I have followed the style guidelines for Python source files (if applicable)
  • I have made corresponding changes to the documentation (if applicable)
  • I have added tests that prove my fix is effective or that my feature works (if applicable)

@GuySten
GuySten requested a review from paulromano as a code owner June 15, 2025 02:06
@GuySten GuySten changed the title Ta180 fixing expansion of elemental Ta bug Jun 15, 2025
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GuySten marked this pull request as draft June 15, 2025 04:50
@GuySten
GuySten marked this pull request as ready for review June 15, 2025 05:08
@GuySten

GuySten commented Jun 15, 2025

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This pull request works. One of the tests just timed out.

@paulromano paulromano left a comment

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Thanks @GuySten!

@paulromano
paulromano enabled auto-merge (squash) June 18, 2025 11:55
@paulromano
paulromano merged commit 1c5aa65 into openmc-dev:develop Jun 18, 2025
@GuySten
GuySten deleted the ta180 branch June 18, 2025 16:48
@shimwell

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Just to mention we spotted something in the some depletion V&V that also suggests something was wrong with the Ta element.

Depletion of Ta was giving rather different results to FISPACT.

https://jbae11.github.io/openmc_activator/docs/Ta.html

@jbae11 are the chain files influenced by this PR as I think we are using openmc with this bug fixed elsewhere in the workflow

apingegno pushed a commit to apingegno/openmc that referenced this pull request May 7, 2026
Co-authored-by: Paul Romano <paul.k.romano@gmail.com>
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Natural abundances for Ta should account for Ta180 metastable

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