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France France · Saint-Paul-lès-Durance · 43.674, 5.773

Harmonie

Harmonie, a research reactor (tank) in Saint-Paul-lès-Durance, France, with 1 kW of thermal power, operated by CEN Cadarache. Decommissioned, first critical in 1965.

It was one of the 38 research reactors France has had; 2 remain in operation today. It went critical 17 years after the first research reactor in France, ZOE (EL-1) (1948). 36 tank-type reactors remain in operation today across 23 countries. Its declared uses include materials testing.

Country
France
City
Saint-Paul-lès-Durance
Type
Tank
Thermal power
1 kW
Operator
CEN Cadarache
Status
Decommissioned
First criticality
1965
Purpose
Materials testing

Data: IAEA RRDB · updated on Sep 3, 2026

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