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Cyclus

Cyclus Organization

This organization encompasses the repositories of and relating to the Cyclus fuel cycle simulator code. Cyclus is an agent-based nuclear fuel cycle simulator. Cyclus is designed to enable a broad spectrum of fuel cycle simulation, while providing a low barrier to entry for new users and agent developers.

Cyclus logo

The three most-used repositories are:

  • Cyclus
  • Cycamore
  • Cymetric

The structure of the organization is:

Each repository will have their own README, CONTRIBUTING, and LICENSE, but some information that is relevant to all repositories:

  • Follow up each of the procedures outlined in the Cyclus Enhancement Proposals (CEPs)
  • All PRs should address an open issue. If an issue for your PR does not exist, please make an issue first
  • When creating an issue or PR, it can be a:
    • Bug: Something is broken in the code and it is not working as one would expect
    • Feature: You are requesting or adding in a new capability that does not exist in the code currently
    • Task: Something that is not a bug or a feature; may be more administrative in nature, such as updating documentation.
  • The three repositories listed above have a discussions tab, which is the ideal place to ask questions about installation, use, suggest ideas, etc.

More information about Cyclus and the organization can be found on the Cyclus website.

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  1. cyclus cyclus Public

    The Cyclus Nuclear Fuel Cycle Simulator

    C++ 82 72

  2. cycamore cycamore Public

    The CYClus Additional Module REpository

    C++ 15 41

  3. cymetric cymetric Public

    Python 5 22

  4. cyclus.github.com cyclus.github.com Public

    Landing page repository

    Python 8 31

  5. recycle recycle Public

    Contributed Cyclus-compatible modules, more advanced than those available in Cycamore.

    C++ 1 8

  6. cyclus_gui cyclus_gui Public

    Jupyter Notebook 2

Repositories

Showing 10 of 32 repositories
  • cycamore Public

    The CYClus Additional Module REpository

    cyclus/cycamore’s past year of commit activity
    C++ 15 41 73 7 Updated Aug 8, 2025
  • cyclus Public

    The Cyclus Nuclear Fuel Cycle Simulator

    cyclus/cyclus’s past year of commit activity
    C++ 82 72 148 13 Updated Aug 8, 2025
  • recycle Public

    Contributed Cyclus-compatible modules, more advanced than those available in Cycamore.

    cyclus/recycle’s past year of commit activity
    C++ 1 8 7 2 Updated Jul 17, 2025
  • cymetric Public
    cyclus/cymetric’s past year of commit activity
    Python 5 22 27 9 Updated Jul 4, 2025
  • cyclus.github.com Public

    Landing page repository

    cyclus/cyclus.github.com’s past year of commit activity
    Python 8 31 65 11 Updated Jun 18, 2025
  • cyclus_gui Public
    cyclus/cyclus_gui’s past year of commit activity
    Jupyter Notebook 0 BSD-3-Clause 2 3 0 Updated Jun 8, 2025
  • .github Public

    Community health repo

    cyclus/.github’s past year of commit activity
    0 BSD-3-Clause 3 0 1 Updated May 28, 2025
  • cyclus/fictitious-case-studies’s past year of commit activity
    0 1 6 1 Updated Nov 24, 2023
  • data Public

    Repository for the storage of all Cyclus related data dependencies

    cyclus/data’s past year of commit activity
    0 BSD-3-Clause 0 0 0 Updated Jul 22, 2021
  • cyclus4fco Public
    cyclus/cyclus4fco’s past year of commit activity
    Python 1 BSD-3-Clause 1 2 0 Updated Jun 29, 2018

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