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134 lines
8.1 KiB
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====================
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What's New in 0.13.3
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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 many bug fixes, performance improvements, and
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several notable new features. Some of the highlights include support for MCPL
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source files, NCrystal thermal scattering materials, and a new
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:class:`openmc.stats.MeshSpatial` class that allows a source distribution to be
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specified over a mesh. Additionally, OpenMC now allows you to export your model
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as a single XML file rather than separate XML files for geometry, materials,
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settings, and tallies.
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------------------------------------
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Compatibility Notes and Deprecations
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------------------------------------
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- Atomic mass data used in :func:`openmc.data.atomic_mass` has been updated to
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AME 2020, which results in slightly different masses.
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------------
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New Features
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------------
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- Support was added for `MCPL <https://mctools.github.io/mcpl/>`_ files to be
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used as external sources. Additionally, source points and surfaces sources can
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be written as MCPL files instead of HDF5 files. (`#2116
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<https://github.com/openmc-dev/openmc/pull/2116>`_)
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- Support was added for `NCrystal <https://github.com/mctools/ncrystal>`_
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thermal scattering materials. (`#2222
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<https://github.com/openmc-dev/openmc/pull/2222>`_)
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- The :class:`~openmc.CylindricalMesh` and :class:`~openmc.SphericalMesh`
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classes now have an ``origin`` attribute that changes the center of the mesh.
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(`#2256 <https://github.com/openmc-dev/openmc/pull/2256>`_)
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- A new :class:`openmc.model.Polygon` class allows defining generalized 2D
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polygons. (`#2266 <https://github.com/openmc-dev/openmc/pull/2266>`_)
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- A new :func:`openmc.data.decay_energy` function and
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:meth:`openmc.Material.get_decay_heat` method enable determination of decay
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heat from a single nuclide or material. (`#2287
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<https://github.com/openmc-dev/openmc/pull/2287>`_)
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- Full models can now be written as a single XML file rather than separate
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geometry, materials, settings, and tallies XML files. (`#2291
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<https://github.com/openmc-dev/openmc/pull/2291>`_)
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- Discrete distributions are now sampled using alias sampling, which is O(1) in
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time. (`#2329 <https://github.com/openmc-dev/openmc/pull/2329>`_)
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- The new :class:`openmc.stats.MeshSpatial` allows a spatial source distribution
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to be specified with source strengths for each mesh element. (`#2334
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<https://github.com/openmc-dev/openmc/pull/2334>`_)
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- The new :meth:`openmc.Geometry.get_surfaces_by_name` method returns a list of
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matching surfaces in a geometry. (`#2347
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<https://github.com/openmc-dev/openmc/pull/2347>`_)
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- A new :attr:`openmc.Settings.create_delayed_neutrons` attribute controls
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whether delayed neutrons are created during a simulation. (`#2348
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<https://github.com/openmc-dev/openmc/pull/2348>`_)
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- The :meth:`openmc.deplete.Results.export_to_materials` method now takes a
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``path`` argument. (`#2364 <https://github.com/openmc-dev/openmc/pull/2364>`_)
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- A new :meth:`openmc.EnergyFilter.get_tabular` method allows one to create a
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tabular distribution based on tally results using an energy filter. (`#2371
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<https://github.com/openmc-dev/openmc/pull/2371>`_)
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- Several methods in the :class:`openmc.Material` class that require a volume to
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be set (e.g., :meth:`~openmc.Material.get_mass`) now accept a ``volume``
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argument. (`#2412 <https://github.com/openmc-dev/openmc/pull/2412>`_)
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---------
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Bug Fixes
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---------
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- Fix for finding redundant surfaces (`#2263 <https://github.com/openmc-dev/openmc/pull/2263>`_)
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- Adds tolerance for temperatures slightly out of bounds (`#2265 <https://github.com/openmc-dev/openmc/pull/2265>`_)
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- Fix getter/setter for weight window bounds (`#2275 <https://github.com/openmc-dev/openmc/pull/2275>`_)
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- Make sure Chain.reduce preserves decay source (`#2283 <https://github.com/openmc-dev/openmc/pull/2283>`_)
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- Fix array shape for weight window bounds (`#2284 <https://github.com/openmc-dev/openmc/pull/2284>`_)
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- Fix for non-zero CDF start points in TSL data (`#2290 <https://github.com/openmc-dev/openmc/pull/2290>`_)
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- Fix a case where inelastic scattering yield is zero (`#2295 <https://github.com/openmc-dev/openmc/pull/2295>`_)
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- Prevent Compton profile out-of-bounds memory access (`#2297 <https://github.com/openmc-dev/openmc/pull/2297>`_)
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- Produce light particles from decay (`#2301 <https://github.com/openmc-dev/openmc/pull/2301>`_)
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- Fix zero runtime attributes in depletion statepoints (`#2302 <https://github.com/openmc-dev/openmc/pull/2302>`_)
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- Fix bug in openmc.Universe.get_nuclide_densities (`#2310 <https://github.com/openmc-dev/openmc/pull/2310>`_)
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- Only show print output from depletion on rank 0 (`#2311 <https://github.com/openmc-dev/openmc/pull/2311>`_)
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- Fix photon transport with no atomic relaxation data (`#2312 <https://github.com/openmc-dev/openmc/pull/2312>`_)
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- Fix for precedence in region expressions (`#2318 <https://github.com/openmc-dev/openmc/pull/2318>`_)
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- Allow source particles with energy below cutoff (`#2319 <https://github.com/openmc-dev/openmc/pull/2319>`_)
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- Fix IncidentNeutron.from_njoy for high temperatures (`#2320 <https://github.com/openmc-dev/openmc/pull/2320>`_)
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- Add capability to unset cell temperatures (`#2323 <https://github.com/openmc-dev/openmc/pull/2323>`_)
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- Fix in plot_xs when S(a,b) tables are present (`#2335 <https://github.com/openmc-dev/openmc/pull/2335>`_)
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- Various fixes for tally triggers (`#2344 <https://github.com/openmc-dev/openmc/pull/2344>`_)
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- Raise error when mesh is flat (`#2363 <https://github.com/openmc-dev/openmc/pull/2363>`_)
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- Don't call normalize inside Tabular.mean (`#2375 <https://github.com/openmc-dev/openmc/pull/2375>`_)
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- Avoid out-of-bounds access in inelastic scatter sampling (`#2378 <https://github.com/openmc-dev/openmc/pull/2378>`_)
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- Use correct direction for anisotropic fission (`#2381 <https://github.com/openmc-dev/openmc/pull/2381>`_)
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- Fix several thermal scattering nuclide assignments (`#2382 <https://github.com/openmc-dev/openmc/pull/2382>`_)
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- Fix _materials_by_id attribute in Model (`#2385 <https://github.com/openmc-dev/openmc/pull/2385>`_)
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- Updates to batch checks for simulation restarts (`#2390 <https://github.com/openmc-dev/openmc/pull/2390>`_)
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- write_data_to_vtk volume normalization correction (`#2397 <https://github.com/openmc-dev/openmc/pull/2397>`_)
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- Enable generation of JEFF 3.3 depletion chain (`#2410 <https://github.com/openmc-dev/openmc/pull/2410>`_)
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- Fix spherical to Cartesian coordinate conversion (`#2417 <https://github.com/openmc-dev/openmc/pull/2417>`_)
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- Handle zero photon cross sections in IncidentPhoton.from_ace (`#2433 <https://github.com/openmc-dev/openmc/pull/2433>`_)
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- Fix hybrid depletion when nuclides are not present (`#2436 <https://github.com/openmc-dev/openmc/pull/2436>`_)
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- Fix bug in cylindrical and spherical meshes (`#2439 <https://github.com/openmc-dev/openmc/pull/2439>`_)
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- Improvements to mesh radial boundary coincidence (`#2443 <https://github.com/openmc-dev/openmc/pull/2443>`_)
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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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- `Rémi Delaporte-Mathurin <https://github.com/RemDelaporteMathurin>`_
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- `Christopher Fichtlscherer <https://github.com/cfichtlscherer>`_
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- `Valerio Giusti <https://github.com/valeriogiusti>`_
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- `Chris Keckler <https://github.com/keckler>`_
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- `Kalin Kiesling <https://github.com/kkiesling>`_
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- `Thomas Kittelmann <https://github.com/tkittel>`_
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- `Erik Knudsen <https://github.com/ebknudsen>`_
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- `Colin Larmier <https://github.com/colinelarmier>`_
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- `Amanda Lund <https://github.com/amandalund>`_
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- `Jose Ignacio Marquez Damien <https://github.com/marquezj>`_
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- `Josh May <https://github.com/joshmay1>`_
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- `Patrick Myers <https://github.com/myerspat>`_
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- `Baptiste Mouginot <https://github.com/bam241>`_
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- `April Novak <https://github.com/aprilnovak>`_
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- `Matthew Nyberg <https://github.com/NybergWISC>`_
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- `Ethan Peterson <https://github.com/eepeterson>`_
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- `Gavin Ridley <https://github.com/gridley>`_
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- `Paul Romano <https://github.com/paulromano>`_
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- `Patrick Shriwise <https://github.com/pshriwise>`_
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- `Jonathan Shimwell <https://github.com/Shimwell>`_
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- `Paul Wilson <https://github.com/gonuke>`_
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- `Olek Yardas <https://github.com/yardasol>`_
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- `Jiankai Yu <https://github.com/rockfool>`_
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