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France France · Marcoule · 44.143, 4.709

PHENIX

PHENIX, a research reactor (fast) in Marcoule, France, with 563 MW of thermal power, operated by Centre de la Vallee Du Rhone, Cea. Shut down, first critical in 1973.

It was one of the 38 research reactors France has had; 2 remain in operation today. It went critical 25 years after the first research reactor in France, ZOE (EL-1) (1948). 15 fast research reactors remain in operation today across 6 countries. Its declared uses include transmutation and materials testing.

Country
France
City
Marcoule
Type
Fast
Thermal power
563 MW
Operator
Centre de la Vallee Du Rhone, Cea
Status
Shut down
First criticality
1973
Purpose
Transmutation, materials testing

Data: IAEA RRDB · updated on Sep 3, 2026

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