Owner

cyclus

4 indexed repositories · View on GitHub

cyclus
The Cyclus Nuclear Fuel Cycle Simulator

C++ · 94 stars
cycamore
The CYClus Additional Module REpository

C++ · 17 stars
cyclus.github.com
Landing page repository

Python · 8 stars
Workshop-Codespace
Materials and codespaces for Cyclus workshops

Shell · 1 star

Beginner friendly Everything

Open All

[Task] Enhance the Greedy Preconditioner Test's Mechanics Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

cyclus/cyclus#1980 · Opened Sep 16, 2026
[Task] Enhance Greedy Preconditioner `Conditioning` Test Readability Open

cyclus/cyclus#1979 · 1 assignee · Opened Sep 16, 2026
[Bug] MatBuyPolicy causes simulation to fail by "Cannot combine a tracked and untracked material!" error Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

cyclus/cyclus#1978 · 2 comments · Opened Sep 16, 2026
[Bug] Fix MacOS CI testing Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

cyclus/cyclus#1977 · Opened Sep 14, 2026
[Task] Decay Overhaul Open

cyclus/cyclus#1975 · 1 assignee · Opened Sep 14, 2026
[Feature] Source that Creates Material every timestep instead of all at once when it's built Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

cyclus/cycamore#694 · Opened Sep 11, 2026
[Bug] In `lazy` Decay Mode, if Decay Threshold causes decay to be skipped and then Absorb happens, materials never decay Open

Defect

cyclus/cyclus#1973 · 1 comment · 1 assignee · Opened Sep 10, 2026
[Task] Move the EG01-23 input file Open

cyclus/Workshop-Codespace#42 · 1 assignee · Opened Aug 16, 2026
Change AdjustMatlParms in Resource Exchange Tests from squaring to some other function Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

cyclus/cyclus#1971 · Opened Aug 9, 2026
[Bug] Booleans cannot be set with `true` or `t`, only `1` despite clear intent for those to be supported in `infile_tree.h` Open

cyclus/cyclus#1969 · 1 assignee · Opened Jul 23, 2026
[Task] Add a unit_value only constructor to Resource Open

cyclus/cyclus#1968 · 1 assignee · Opened Jul 15, 2026
[Feature] Add required inventory to `ResBuf` Open

cyclus/cyclus#1967 · 1 assignee · Opened Jul 7, 2026
[Task] Style Audit Open

Style

cyclus/cyclus#1964 · 1 assignee · Opened Jun 26, 2026
[Task] Memory Leak Check Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

cyclus/cyclus#1963 · Opened Jun 26, 2026
[Task] Run the codespace during the day and time of the tutorial Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

cyclus/Workshop-Codespace#23 · Opened Jun 12, 2026
[Task] Create Page to showcase some cyclus research Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

cyclus/Workshop-Codespace#14 · Opened Jun 11, 2026
Create Page for Post Workshop Tasts/Resources Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

cyclus/Workshop-Codespace#13 · Opened Jun 11, 2026
[Feature] Update schema documentation Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

cyclus/cycamore#691 · Opened Jun 11, 2026
[Task] Fix Typos in the User Tutorial Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

cyclus/cyclus.github.com#454 · Opened Jun 11, 2026
[Feature] Document helpful VSCode / XML tricks for usability Open

documentation

Difficulty 2/5 Half a day Newbie friendliness 62/100

cyclus/Workshop-Codespace#5 · 4 comments · Opened Jun 11, 2026
[Feature] Limit how materials are allowed to decay Open

v1.7

cyclus/cyclus#1957 · 3 comments · 1 assignee · Opened Jun 1, 2026
[Feature] Introduce some physical constants for use throughout kernel and archetypes Open

beyond v1.7

Difficulty 5/5 Over a week Newbie friendliness 42/100

cyclus/cyclus#1955 · Opened May 31, 2026
[Task] Move default values for variables in class definition Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

cyclus/cycamore#688 · Opened May 29, 2026
[Task] Check for `#pragma cyclus var` consistency throughout Cycamore. Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

cyclus/cycamore#687 · 3 comments · Opened May 28, 2026
[Bug] Windows Cairrage Return Breaks Docker Image on Windows Machines Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

cyclus/cyclus#1953 · 4 comments · Opened May 28, 2026
Add Eigen as a dependency Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

cyclus/cyclus#1952 · 2 comments · Opened May 28, 2026
[Feature] More robust user interface to ensure small decay can be captured Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

cyclus/cyclus#1947 · Opened May 25, 2026
[Task] Add the Latest Cymeteric Docker Container on the Install Sidebar Open

Difficulty 3/5 1-2 days Newbie friendliness 64/100

cyclus/cyclus.github.com#453 · Opened May 23, 2026
[Task] Update Release Protocol Open

v1.7

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

cyclus/cyclus#1945 · Opened May 18, 2026
[Task] Make the MatlBuyPolicy and MatlSellPolicy not "Experimental" Open

beyond v1.7 Maintenance

cyclus/cyclus#1944 · 1 assignee · Opened May 6, 2026
[Task] Rename Variables in the DRE Open

Style v2.0

cyclus/cyclus#1942 · 1 assignee · Opened May 5, 2026
[Feature] Add variable for initial inventory for the storage facility Open

v1.7

cyclus/cycamore#683 · 1 assignee · Opened Apr 21, 2026
[Feature] Add variable for initial inventory for the fuel fabrication facility Open

v1.7

cyclus/cycamore#682 · 1 assignee · Opened Apr 21, 2026
[Feature] Add variable for initial inventory for the mixer facility Open

v1.7

cyclus/cycamore#681 · 1 comment · 1 assignee · Opened Apr 21, 2026
[Task] V2 - Reexamine the Purpose and Implementation of node_arc_map in `exchange_translator` Open

DK Critical Path v2.0

cyclus/cyclus#1941 · 1 assignee · Opened Mar 17, 2026
[Feature] Allow sources to have variable throughput Open

beyond v1.7

cyclus/cycamore#679 · 1 comment · 1 assignee · Opened Feb 26, 2026
Does the Adding Regions and Institutions page need restructuring? Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

cyclus/cyclus.github.com#448 · 1 comment · Opened Feb 26, 2026
Condensing Miscellaneous Structure/Syntax Rules in Tutorials Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

cyclus/cyclus.github.com#445 · Opened Feb 5, 2026
DeployInst before simulation start Open

recommend v1.7 removal v1.7

cyclus/cycamore#674 · 3 comments · 1 assignee · Opened Jan 23, 2026
[Task] Update tutorial files in Zenodo Object Open

0 - Backlog

cyclus/cyclus.github.com#441 · 3 comments · 1 assignee · Opened Jan 13, 2026
[Bug] Conda Install and then Update Seems Broken Open

Defect Infrastructure: Install v1.7

Difficulty 4/5 3-5 days Newbie friendliness 35/100

cyclus/cyclus#1936 · Opened Jan 8, 2026
[Feature] Update CI to support PRs to the 2.0 development branch Open

Infrastructure: CI v2.0

Difficulty 3/5 1-2 days Newbie friendliness 45/100

cyclus/cyclus#1935 · Opened Jan 5, 2026
[Task] Revisit preference adjustment interface for marginal cost Open

v2.0

Difficulty 4/5 3-5 days Newbie friendliness 35/100

cyclus/cyclus#1933 · Opened Jan 2, 2026
[Feature] Allow facilities (esp. storage) to start with some inventory Open

v1.7

cyclus/cycamore#673 · 6 comments · 1 assignee · Opened Dec 23, 2025
Cyclus Recap Tutorial 2 Typo Open

cyclus/cyclus.github.com#439 · 1 assignee · Opened Dec 17, 2025
[Feature] Verbose Test Output for Debug Open

v1.7

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

cyclus/cyclus#1930 · Opened Dec 15, 2025
[Task] Improve comments in the final XML files generated by tutorials Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

cyclus/cyclus.github.com#438 · Opened Dec 9, 2025
[Feature] Improve documentation for database types and how they are generated and documented. Open

cyclus/cyclus.github.com#437 · 1 assignee · Opened Nov 21, 2025
[Feature] Need to define `mutual requests` on the website. Open

0 - Backlog

Difficulty 3/5 1-2 days Newbie friendliness 35/100

cyclus/cyclus.github.com#434 · Opened Nov 19, 2025
[Feature] Method to find a specific agent prototype in a context by name Open

v1.7

cyclus/cyclus#1920 · 5 comments · 1 assignee · Opened Nov 14, 2025

Showing the newest 100

This page lists what was indexed most recently. Advanced filter has the whole inventory, narrowed by language, difficulty and how long a task takes.

Open advanced filter

cyclus

Showing the newest 100

Get new issues in your inbox