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MontePy

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MontePy

Free

Free Python library; no paid plans stated

Every plan, in full

On the record

Assessment tools
Nomontepy.org · read 24 Sep 2026
Authoring tools
Nomontepy.org · read 24 Sep 2026
Automation
Its object-oriented interface supports automating tasks such as updating MCNP decks, parameterizing models, and converting models to other Monte Carlo codes.montepy.org · read 8 Oct 2026
Browser demos
The documentation provides Jupyter notebooks that can run in a browser, and says they can also be installed and run locally.montepy.org · read 8 Oct 2026
Data export
Nomontepy.org · read 24 Sep 2026
Delivery mode
hybridmontepy.org · read 24 Sep 2026
Does not run MCNP
MontePy does not run MCNP or parse MCNP output files.montepy.org · read 8 Oct 2026
Formatting
When writing files, MontePy attempts to preserve the original formatting, though modified objects may be reformatted slightly.montepy.org · read 8 Oct 2026
Input coverage
The project says it handles almost all MCNP input syntax, but does not support macrobody facets and documents other syntax limitations.github.com · read 8 Oct 2026
Installation
The library can be installed with pip or conda.montepy.org · read 8 Oct 2026
Intended users
Documented use cases include reactor reconfiguration, fuel shuffling, model parameter studies, and updating models with results from other codes.montepy.org · read 8 Oct 2026
Lesson library
Nomontepy.org · read 24 Sep 2026
License
The project’s GitHub repository identifies its license as MIT.github.com · read 8 Oct 2026
Maker
The documentation copyright is attributed to Battelle Energy Alliance LLC.montepy.org · read 8 Oct 2026
Purpose
MontePy is a Python library for reading, editing, and writing MCNP input files.montepy.org · read 8 Oct 2026
Semantic model
MontePy links related input objects, such as cells and materials, so changing an object can update references in the file.montepy.org · read 8 Oct 2026
Support
The project directs users to open GitHub issues for feature requests and lists an email address for questions.github.com · read 8 Oct 2026
Supported MCNP versions
MontePy primarily supports MCNP 6.2; MCNP 6.3 is not fully supported, and earlier versions may have issues.montepy.org · read 8 Oct 2026

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