ukaea/PROCESS

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PROCESS is a systems code at UKAEA that calculates in a self-consistent manner the parameters of a fusion power plant with a specified performance, ensuring that its operating limits are not violated, and with the option to optimise to a given function of these parameters.

Stars: 71
Forks: 27
Open beginner issues: 0
Indexed issues: 190
Avg merge: 2d 18h
Merged PRs (30d): 33

Dominant language: Python
License: MIT
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

Open All

190 open issues indexed

Reduce duplication of geometry dataclasses in `tfcoil/superconducting.py` Open

papercut

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

ukaea/PROCESS#4600 · 1 comment · Opened Sep 17, 2026
Integrate veqpy as an optional tokamak equilibrium solver Open

Dependencies Physics Refactor

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

ukaea/PROCESS#4593 · 2 comments · Opened Sep 13, 2026
`stresscl` refactor Open

Refactor

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

ukaea/PROCESS#4588 · Opened Sep 9, 2026
Possible duplicate variable Open

papercut

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

ukaea/PROCESS#4582 · Opened Sep 4, 2026
:bug: Currently unable to run a fully Deuterium plasma without ZeroDivisionError Open

Bug

Difficulty 4/5 3-5 days Newbie friendliness 68/100

ukaea/PROCESS#4576 · 1 comment · Opened Sep 2, 2026
Run PROCESS with no divertor Open

Divertor

ukaea/PROCESS#4546 · 1 assignee · Opened Aug 21, 2026
Add test to check TF coil area Open

papercut TF Coil

ukaea/PROCESS#4545 · 1 assignee · Opened Aug 20, 2026
TODOs in availability.py Open

papercut

ukaea/PROCESS#4527 · 1 assignee · Opened Aug 14, 2026
Move constants from availability.py to constants.py Open

papercut

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

ukaea/PROCESS#4525 · 2 comments · Opened Aug 14, 2026
:bug: bc20m: Critical field at zero temperature and strain (T). Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

ukaea/PROCESS#4520 · Opened Aug 13, 2026
Total HTS tape length no longer being calculated or output Open

ukaea/PROCESS#4517 · 1 assignee · Opened Aug 12, 2026
Missing variable descriptions in dataclasses in superconducting.py Open

papercut

ukaea/PROCESS#4513 · 1 assignee · Opened Aug 11, 2026
Make plot labels easier to read Open

papercut

ukaea/PROCESS#4510 · 7 comments · 1 assignee · Opened Aug 10, 2026
OUT.DAT PF coil numbering Open

Input/Output Files

ukaea/PROCESS#4502 · 1 assignee · Opened Aug 6, 2026
Update Overall-power-flow.png Open

ukaea/PROCESS#4490 · 6 comments · 1 assignee · Opened Jul 30, 2026
Resolve units discrepancy in `water_use.py` Open

papercut

ukaea/PROCESS#4489 · 3 comments · 2 assignees · Opened Jul 30, 2026
We should write the scan variable to the MFILE Open

papercut

Difficulty 3/5 1-2 days Newbie friendliness 38/100

ukaea/PROCESS#4487 · Opened Jul 29, 2026
Add test case for `TFCSRadialConfiguration.TF_INSIDE_CS` to `test_stresscl()` Open

papercut

ukaea/PROCESS#4448 · 1 assignee · Opened Jul 20, 2026
hfact uses wrong loss power index Open

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

ukaea/PROCESS#4443 · 8 comments · Opened Jul 17, 2026
Restore fixed point output in OUT.DAT Open

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

ukaea/PROCESS#4425 · Opened Jul 9, 2026
:bug:"Transport power" is wrong Open

ukaea/PROCESS#4421 · 1 comment · 1 assignee · Opened Jul 7, 2026
Create PR comment for making improve-quality-check worse Open

CI

ukaea/PROCESS#4420 · 1 comment · 1 assignee · Opened Jul 7, 2026
:bug:Power balance for power plant fails by the amount of the ohmic heating Open

ukaea/PROCESS#4419 · 1 assignee · Opened Jul 7, 2026
:bug:Neutron losses are not calculated anywhere Open

ukaea/PROCESS#4414 · 1 assignee · Opened Jul 6, 2026
Constraint 17 temporary fix Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

ukaea/PROCESS#4409 · 1 comment · 1 reaction · Opened Jul 2, 2026
Rearrange constants Open

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

ukaea/PROCESS#4388 · 3 comments · Opened Jun 26, 2026
`r_f_liq_ib` assigned twice Open

ukaea/PROCESS#4385 · 1 assignee · Opened Jun 25, 2026
Make integration tests to check for individual model variations Open

Testing

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

ukaea/PROCESS#4380 · Opened Jun 24, 2026
Bootstrap current fraction is clipped in no-auxilliary current drive case Open

Bootstrap Current

ukaea/PROCESS#4375 · 1 assignee · Opened Jun 23, 2026
Remove HTML formatting in docstrings Open

papercut

ukaea/PROCESS#4334 · 1 assignee · Opened Jun 18, 2026
"ITV" label Open

Blocked Data structure Input/Output Files

Difficulty 3/5 1-2 days Newbie friendliness 52/100

ukaea/PROCESS#4313 · 1 comment · Opened Jun 15, 2026
Non-existent variables and missing function args Open

ukaea/PROCESS#4307 · 1 assignee · Opened Jun 12, 2026
Variables with missing descriptions Open

Data structure

ukaea/PROCESS#4271 · 1 comment · 1 assignee · Opened May 22, 2026
Rearrange fwbs variables Open

Blanket Data structure First Wall

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

ukaea/PROCESS#4270 · Opened May 22, 2026
Variable restructuring Open

epic

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

ukaea/PROCESS#4248 · Opened May 13, 2026
Resistive TF coils refactor and testing Open

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

ukaea/PROCESS#4242 · Opened May 12, 2026
VaryRun keeping intermediate files Open

Input/Output Files

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

ukaea/PROCESS#4227 · 1 comment · Opened May 6, 2026
Refactor of CS coil modelling (iohcl switch) Open

CS Coil Refactor

ukaea/PROCESS#4205 · 3 comments · 2 assignees · Opened Apr 22, 2026
Physical limit on the ramp-down time Open

Physics

ukaea/PROCESS#4191 · 1 assignee · Opened Apr 15, 2026
0D Runaway electron model Open

Physics

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

ukaea/PROCESS#4177 · Opened Apr 13, 2026
Only read IN.DATs using the InDat class Open

Input/Output Files Triaged

ukaea/PROCESS#4174 · 1 comment · 1 assignee · Opened Apr 10, 2026
Please output radii (inner and outer) of all components in the radial build (inboard and outboard) Open

Input/Output Files

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

ukaea/PROCESS#4171 · 2 comments · Opened Apr 10, 2026
Support D-shaped internal components in plot_proc radial build Open

Plotting

ukaea/PROCESS#4168 · 1 assignee · Opened Apr 9, 2026
Improve functionality to write new in.dat from an mfile Open

Blocked Command Line Interface Input/Output Files

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

ukaea/PROCESS#4161 · 1 comment · Opened Apr 1, 2026
Remove F90 references from both docstrings and docs Open

Documentation Python conversion

ukaea/PROCESS#4141 · 1 assignee · Opened Mar 24, 2026
Costs that rely on net electric Open

Cost model

ukaea/PROCESS#4094 · 1 comment · 1 assignee · Opened Feb 12, 2026
Duplicate constraint plotting functionality Open

Plotting Redundancy

ukaea/PROCESS#4079 · 2 comments · 1 assignee · Opened Feb 2, 2026
Testing of resistive TF coil model Open

Testing TF Coil

ukaea/PROCESS#4063 · 2 assignees · Opened Jan 22, 2026
Testing of NBI models Open

Neutral Beam Testing

ukaea/PROCESS#4062 · 2 assignees · Opened Jan 22, 2026
Change scan example scanning variable Open

Examples

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

ukaea/PROCESS#4052 · Opened Jan 19, 2026

ukaea/PROCESS

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