United Kingdom United Kingdom · 51.659, -1.231

MAST-U

MAST-U, a fusion device (tokamak) in United Kingdom, operated by UKAEA. Operating.

It is the only research reactor operating in the United Kingdom today; the country has shut down one other.

Country
United Kingdom
City
Type
Fusion device · Tokamak
Confinement
Spherical Tokamak
Operator
UKAEA
Status
Operating
First plasma

Data: IAEA FusDIS · updated on Sep 5, 2026

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