United Kingdom United Kingdom · Aldermaston · 51.380, -1.146

MERLIN

MERLIN, a research reactor (pool) in Aldermaston, United Kingdom, with 5 MW of thermal power, operated by Assoiated Electrical Industries. Decommissioned, first critical in 1959.

It was one of the 46 research reactors the United Kingdom has had; 1 remains in operation today. It went critical 12 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
Aldermaston
Type
Pool
Thermal power
5 MW
Operator
Assoiated Electrical Industries
Status
Decommissioned
First criticality
1959

Data: IAEA RRDB · updated on Sep 3, 2026

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