===================
What's New in 0.7.0
===================

-------------------
System Requirements
-------------------

There are no special requirements for running the OpenMC code. As of this
release, OpenMC has been tested on a variety of Linux distributions, Mac OS X,
and Microsoft Windows 7. Memory requirements will vary depending on the size of
the problem at hand (mostly on the number of nuclides in the problem).

------------
New Features
------------

- Complete Python API
- Python 3 compatability for all scripts
- All scripts consistently named openmc-* and installed together
- New 'distribcell' tally filter for repeated cells
- Ability to specify outer lattice universe
- XML input validation utility (openmc-validate-xml)
- Support for hexagonal lattices
- Material union energy grid method
- Tally triggers
- Remove dependence on PETSc
- Significant OpenMP performance improvements
- Support for Fortran 2008 MPI interface
- Use of Travis CI for continuous integration
- Simplifications and improvements to test suite

---------
Bug Fixes
---------

- b5f712_: Fix bug in spherical harmonics tallies
- e6675b_: Ensure all constants are double precision
- 04e2c1_: Fix potential bug in sample_nuclide routine
- 6121d9_: Fix bugs related to particle track files
- 2f0e89_: Fixes for nuclide specification in tallies

.. _b5f712: https://github.com/openmc-dev/openmc/commit/b5f712
.. _e6675b: https://github.com/openmc-dev/openmc/commit/e6675b
.. _04e2c1: https://github.com/openmc-dev/openmc/commit/04e2c1
.. _6121d9: https://github.com/openmc-dev/openmc/commit/6121d9
.. _2f0e89: https://github.com/openmc-dev/openmc/commit/2f0e89

------------
Contributors
------------

This release contains new contributions from the following people:

- `Will Boyd <wbinventor@gmail.com>`_
- `Matt Ellis <mellis13@mit.edu>`_
- `Sterling Harper <sterlingmharper@mit.edu>`_
- `Bryan Herman <bherman@mit.edu>`_
- `Nicholas Horelik <nicholas.horelik@gmail.com>`_
- `Colin Josey <cjosey@mit.edu>`_
- `William Lyu <PaleNeutron@users.noreply.github.com>`_
- `Adam Nelson <nelsonag@umich.edu>`_
- `Paul Romano <paul.k.romano@gmail.com>`_
- `Anthony Scopatz <scopatz@gmail.com>`_
- `Jon Walsh <walshjon@mit.edu>`_
