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100 lines
5.1 KiB
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====================
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What's New in 0.13.0
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====================
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.. currentmodule:: openmc
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-------
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Summary
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-------
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This release of OpenMC includes several noteworthy and unique features. Most
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importantly, mesh-based weight windows have been added and work with all
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supported mesh types (regular, rectilinear, cylindrical, spherical, and
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unstructured). Other additions include torus surfaces, an ability to place
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CAD-based geometries in universes, a feature to export/import physical
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properties, and a filter for particle time.
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There is one breaking changing in the Python API. The
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:class:`openmc.deplete.Operator` class used to accept :class:`~openmc.Geometry`
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and :class:`~openmc.Settings` objects as its first two arguments; users now need
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to pass a :class:`~openmc.model.Model` class instead.
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The minimum supported Python version is now 3.6.
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------------
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New Features
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------------
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- Variance reduction using mesh-based weight windows is now possible with the
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:class:`~openmc.WeightWindows` class.
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- Users can now model axis-aligned tori using the :class:`~openmc.XTorus`,
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:class:`~openmc.YTorus`, and :class:`~openmc.ZTorus` classes.
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- DAGMC CAD-based geometries can now be placed in a universe using
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:class:`~openmc.DAGMCUniverse`, allowing users to combine CSG and CAD-based
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geometry in a single model.
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- The C/C++ API has two new functions ``openmc_properties_export`` and
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``openmc_properties_import`` with corresponding Python API bindings,
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:func:`~openmc.lib.export_properties` and
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:func:`~openmc.lib.import_properties`. These functions allow physical
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properties (temperatures, densities, material compositions) to be written to
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an HDF5 file and re-used for subsequent simulations.
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- A new :class:`~openmc.stats.PowerLaw` univariate distribution
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- The capabilities of the :class:`~openmc.Model` class have been substantially
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expanded (e.g., the :meth:`~openmc.model.Model.deplete`,
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:meth:`~openmc.model.Model.plot_geometry`, and
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:meth:`~openmc.model.Model.rotate_cells` methods).
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- A new :class:`~openmc.TimeFilter` class that allows tallies to be filtered
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by the particle's time, which is now tracked.
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- The :class:`~openmc.Source` class now allows you to specify a time
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distribution.
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- The new :class:`~openmc.CylindricalMesh` and :class:`~openmc.SphericalMesh`
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can be used for mesh tallies over cylidrical and spherical meshes,
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respectively.
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- Geometry plotting, which used to produce the files in the unusual .ppm format,
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now produces .png files by default.
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---------
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Bug Fixes
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---------
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- `Fix for shared fission bank memory errors <https://github.com/openmc-dev/openmc/pull/1856>`_
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- `Make sure properties export only happens from root process <https://github.com/openmc-dev/openmc/pull/1864>`_
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- `Fix pathlib use error in openmc-ace-to-hdf5 <https://github.com/openmc-dev/openmc/pull/1867>`_
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- `Fix DAGMC and libMesh variable in CMake config <https://github.com/openmc-dev/openmc/pull/1870>`_
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- `Fix bug associated with volume calc in MG mode <https://github.com/openmc-dev/openmc/pull/1889>`_
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- `Add missing Settings.write_initial_source property <https://github.com/openmc-dev/openmc/pull/1895>`_
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- `Bug fixes for specifying Materials.cross_sections <https://github.com/openmc-dev/openmc/pull/1898>`_
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- `Removing Legendre filter in diffusion coefficient results <https://github.com/openmc-dev/openmc/pull/1909>`_
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- `Ensure particles lost during event_calculate_xs are terminated <https://github.com/openmc-dev/openmc/pull/1911>`_
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- `Fixed parsing of xsdir entries with a continuation line <https://github.com/openmc-dev/openmc/pull/1913>`_
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- `openmc.RegularMesh attribute consistency <https://github.com/openmc-dev/openmc/pull/1922>`_
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- `Ensure secondary particles below energy cutoff are not created <https://github.com/openmc-dev/openmc/pull/1924>`_
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- `Allow compilation with g++ 11 <https://github.com/openmc-dev/openmc/pull/1938>`_
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- `Depletion-related bug fixes <https://github.com/openmc-dev/openmc/pull/1946>`_
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- `Miscellaneous bug fixes <https://github.com/openmc-dev/openmc/pull/1948>`_
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- `Fixes for various bugs <https://github.com/openmc-dev/openmc/pull/1949>`_
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- `Reset triggers in openmc_reset <https://github.com/openmc-dev/openmc/issues/1957>`_
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------------
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Contributors
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------------
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- `Hunter Belanger <https://github.com/HunterBelanger>`_
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- `Helen Brooks <https://github.com/helen-brooks>`_
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- `Andrew Davis <https://github.com/makeclean>`_
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- `Valerio Giusti <https://github.com/valeriogiusti>`_
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- `Jeff Hammond <https://github.com/jeffhammond>`_
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- `Yuan Hu <https://github.com/YuanHu-PKU-KIT>`_
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- `Andrew Johnson <https://github.com/drewejohnson>`_
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- `Miriam Kreher <https://github.com/mkreher13>`_
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- `Amanda Lund <https://github.com/amandalund>`_
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- `Adam Nelson <https://github.com/nelsonag>`_
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- `April Novak <https://github.com/aprilnovak>`_
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- `Ariful Islam Pranto <https://github.com/AI-Pranto>`_
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- `Gavin Ridley <https://github.com/gridley>`_
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- `Paul Romano <https://github.com/paulromano>`_
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- `Olaf Schumann <https://github.com/ojschumann>`_
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- `Jonathan Shimwell <https://github.com/Shimwell>`_
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- `Patrick Shriwise <https://github.com/pshriwise>`_
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- `John Tramm <https://github.com/jtramm>`_
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