For a long time, fusion energy has been dogged by a persistent cliché — always 30 years in the future, yet never quite within reach.
UK-led STEP Fusion just pushed back against that cynicism with a stack of blueprints. The UK Atomic Energy Authority (UKAEA) has progressed its design for the STEP fusion plant, aiming to deliver clean, grid-connected fusion energy.
UK-led STEP Fusion just pushed back against that cynicism with a stack of blueprints.
At the 34th Symposium on Fusion Technology (SOFT 2026) in Aix-en-Provence, the UK’s flagship fusion program revealed SPP3. It is the third-generation design iteration of its Spherical Tokamak for Energy Production prototype plant.