Spherical Tokamak in United Kingdom; FusDIS 2026 snapshot.
STEP is a fusion facility or design in United Kingdom, with listed operator/developer not specified in the extracted table row. In the user-supplied 2026 IAEA FusDIS table snapshot, it is classified as Spherical Tokamak with status Planned and public ownership.
Overview
FusDIS categorizes the project as a plant design. The reported status describes the supplied snapshot, not an independently verified construction milestone or scientific achievement.
Source
IAEA Fusion Device Information System (FusDIS), user-supplied 2026 table snapshot. Any historical technical parameters are attributed to World Survey of Fusion Devices 2022.