ES
Spain Spain · Madrid · 40.417, -3.703 (approximate location)

CORAL-I

CORAL-I, a research reactor (critical assembly) in Madrid, Spain, with 50 W of thermal power, operated by Centro de Investigaciones Energeticas, Med. y Tech. (CIEMAT). Decommissioned, first critical in 1968.

It was one of the 4 research reactors Spain has had; 0 remain in operation today. It went critical 10 years after the first research reactor in Spain, JEN-1 Mod (1958). 44 critical assemblies remain in operation today across 12 countries.

Country
Spain
City
Madrid
Type
Critical assembly
Thermal power
50 W
Operator
Centro de Investigaciones Energeticas, Med. y Tech. (CIEMAT)
Status
Decommissioned
First criticality
1968

Data: IAEA RRDB · updated on Sep 3, 2026

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