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OpenMC 0.10.0
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@paulromano paulromano released this 08 Jan 22:19
· 8573 commits to develop since this release
v0.10.0
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This release of OpenMC includes several new features, performance improvements, and bug fixes compared to version 0.9.0. Notably, a C API has been added that enables in-memory coupling of neutronics to other physics fields, e.g., burnup calculations and thermal-hydraulics. The C API is also backed by Python bindings in a new openmc.capi package. Users should be forewarned that the C API is still in an experimental state and the interface is likely to undergo changes in future versions.

The Python API continues to improve over time; several backwards incompatible changes were made in the API which users of previous versions should take note of:

  • To indicate that nuclides in a material should be treated such that elastic scattering is isotropic in the laboratory system, there is a new Material.isotropic property:

    mat = openmc.Material()
mat.add_nuclide('H1', 1.0)
mat.isotropic = ['H1']

    To treat all nuclides in a material this way, the Material.make_isotropic_in_lab method can still be used.

  • The initializers for openmc.Intersection and openmc.Union now expect an iterable.

  • Auto-generated unique IDs for classes now start from 1 rather than 10000.

NOTE: This is the last release of OpenMC that will support Python 2.7. Future releases of OpenMC will require Python 3.4 or later.

New Features

  • Rotationally-periodic boundary conditions
  • C API (with Python bindings) for in-memory coupling
  • Improved correlation for Uranium enrichment
  • Support for partial S(a,b) tables
  • Improved handling of autogenerated IDs
  • Many performance/memory improvements

Bug Fixes

  • 9374695 Fix energy group sampling for multi-group simulations
  • a149ef4 Ensure mutable objects are not hashable
  • 2c9b210 Preserve backwards compatibility for generated HDF5 libraries
  • 8047f6c Handle units of division for tally arithmetic correctly
  • 0beb4cb Compatibility with newer versions of Pandas
  • f124bec Fix generating 0K data with openmc.data.njoy module
  • 0c69153 Bugfix for generating thermal scattering data
  • 61ecb47 Fix bugs in Python multipole objects

Contributors

This release contains new contributions from the following people:

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