United Kingdom United Kingdom · Berkeley · 51.691, -2.459

BERKELEY Zero Energy

BERKELEY Zero Energy, a research reactor (graphite) in Berkeley, United Kingdom, with 1 kW of thermal power, operated by Berkeley Nuclear Laboratories. Decommissioned, first critical in 1966.

It was one of the 46 research reactors the United Kingdom has had; 1 remains in operation today. It went critical 19 years after the first research reactor in the United Kingdom, GLEEP (1947). 4 graphite-moderated research reactors remain in operation today across 3 countries.

Country
United Kingdom
City
Berkeley
Type
Graphite
Thermal power
1 kW
Operator
Berkeley Nuclear Laboratories
Status
Decommissioned
First criticality
1966

Data: IAEA RRDB · updated on Sep 3, 2026

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