United Kingdom United Kingdom · Didcot · 51.606, -1.241

LIDO

LIDO, a research reactor (pool) in Didcot, United Kingdom, with 300 kW of thermal power, operated by Atomic Energy Research Establishment. Decommissioned, first critical in 1956.

It was one of the 46 research reactors the United Kingdom has had; 1 remains in operation today. It went critical 9 years after the first research reactor in the United Kingdom, GLEEP (1947). 48 pool-type reactors remain in operation today across 28 countries.

Country
United Kingdom
City
Didcot
Type
Pool
Thermal power
300 kW
Operator
Atomic Energy Research Establishment
Status
Decommissioned
First criticality
1956

Data: IAEA RRDB · updated on Sep 3, 2026

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