OpenMC Monte Carlo Code https://docs.openmc.org
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Jonathan Shimwell 542f949fa0
Use local variable to avoid attribute lookup in form_rxn_matrix loop (#3884)
Co-authored-by: Perry <yrrepy@users.noreply.github.com>
Co-authored-by: Paul Romano <paul.k.romano@gmail.com>
2026-04-04 20:53:50 +00:00
.claude RAG search tool for agents (#3861) 2026-04-03 16:18:19 -05:00
.github Add reusable reviewing-openmc-code skill and Copilot Review agent (#3842) 2026-03-05 21:40:36 -06:00
cmake Replace xtensor with internal Tensor/View classes (#3805) 2026-02-17 09:50:38 -06:00
docs RAG search tool for agents (#3861) 2026-04-03 16:18:19 -05:00
examples Add truncated normal distribution support (#3761) 2026-02-12 18:25:56 +02:00
include/openmc Approximate multigroup velocity (#3766) 2026-04-02 16:59:02 +00:00
man/man1 Update copyright to 2026 (#3834) 2026-02-26 08:14:28 +00:00
openmc Use local variable to avoid attribute lookup in form_rxn_matrix loop (#3884) 2026-04-04 20:53:50 +00:00
src Add the ability to tally microscopic cross sections in void materials with tracklength estimator (#3771) 2026-04-04 20:32:51 +00:00
tests Add the ability to tally microscopic cross sections in void materials with tracklength estimator (#3771) 2026-04-04 20:32:51 +00:00
tools Add Python 3.14 to testing matrix and drop Python 3.11 (#3642) 2026-02-26 18:18:04 -06:00
vendor Replace xtensor with internal Tensor/View classes (#3805) 2026-02-17 09:50:38 -06:00
.clang-format add west const and enforce in clang format 2023-04-15 12:50:30 -04:00
.git-blame-ignore-revs Added file that can be passed to 'git blame --ignore-revs-file' 2021-08-11 13:46:35 -05:00
.git_archival.txt Add Versioning Support from version.txt (#3140) 2025-02-21 17:48:11 -06:00
.gitattributes Add Versioning Support from version.txt (#3140) 2025-02-21 17:48:11 -06:00
.gitignore RAG search tool for agents (#3861) 2026-04-03 16:18:19 -05:00
.gitmodules Replace xtensor with internal Tensor/View classes (#3805) 2026-02-17 09:50:38 -06:00
.mcp.json RAG search tool for agents (#3861) 2026-04-03 16:18:19 -05:00
.readthedocs.yaml adding pdf to read the docs (#3893) 2026-04-02 17:01:30 -05:00
AGENTS.md RAG search tool for agents (#3861) 2026-04-03 16:18:19 -05:00
CITATION.cff Update CITATION.cff file (#3671) 2025-12-06 21:54:30 +00:00
CLAUDE.md RAG search tool for agents (#3861) 2026-04-03 16:18:19 -05:00
CMakeLists.txt Refactor Ray class into its own file (#3845) 2026-03-06 01:07:42 +00:00
CODE_OF_CONDUCT.md Clarify enforcement in code of conduct 2018-07-25 06:30:26 -05:00
CODEOWNERS NCrystal becomes runtime rather than buildtime dependency (#3328) 2025-03-05 15:45:27 -06:00
CONTRIBUTING.md Release notes for 0.15.1 (#3340) 2025-03-07 14:49:36 -06:00
Dockerfile Speed up Docker build (#3841) 2026-03-01 21:52:51 +02:00
LICENSE Update copyright to 2026 (#3834) 2026-02-26 08:14:28 +00:00
MANIFEST.in remove gsl-lite dependency (#3225) 2025-02-20 01:03:20 +00:00
pyproject.toml Add method on Material for computing photon contact dose rate (#3700) 2026-03-03 15:48:56 +00:00
pytest.ini Skip multipole-related tests if OPENMC_MULTIPOLE_LIBRARY is not set 2018-02-06 13:27:01 -05:00
README.md ci badge on readme points to develop status (#2712) 2023-09-27 13:31:04 +00:00

OpenMC Monte Carlo Particle Transport Code

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The OpenMC project aims to provide a fully-featured Monte Carlo particle transport code based on modern methods. It is a constructive solid geometry, continuous-energy transport code that uses HDF5 format cross sections. The project started under the Computational Reactor Physics Group at MIT.

Complete documentation on the usage of OpenMC is hosted on Read the Docs (both for the latest release and developmental version). If you are interested in the project, or would like to help and contribute, please get in touch on the OpenMC discussion forum.

Installation

Detailed installation instructions can be found in the User's Guide.

Citing

If you use OpenMC in your research, please consider giving proper attribution by citing the following publication:

Troubleshooting

If you run into problems compiling, installing, or running OpenMC, first check the Troubleshooting section in the User's Guide. If you are not able to find a solution to your problem there, please post to the discussion forum.

Reporting Bugs

OpenMC is hosted on GitHub and all bugs are reported and tracked through the Issues feature on GitHub. However, GitHub Issues should not be used for common troubleshooting purposes. If you are having trouble installing the code or getting your model to run properly, you should first send a message to the discussion forum. If it turns out your issue really is a bug in the code, an issue will then be created on GitHub. If you want to request that a feature be added to the code, you may create an Issue on github.

License

OpenMC is distributed under the MIT/X license.