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France France · Gif-sur-Yvette · 48.702, 2.134

Alizee

Alizee, a research reactor (critical assembly) in Gif-sur-Yvette, France, with 100 W of thermal power, operated by CEA Saclay. Shut down, first critical in 1959.

It was one of the 38 research reactors France has had; 2 remain in operation today. It went critical 11 years after the first research reactor in France, ZOE (EL-1) (1948). 44 critical assemblies remain in operation today across 12 countries. Its declared uses include materials testing.

Country
France
City
Gif-sur-Yvette
Type
Critical assembly
Thermal power
100 W
Operator
CEA Saclay
Status
Shut down
First criticality
1959
Purpose
Materials testing

Data: IAEA RRDB · updated on Sep 3, 2026

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