Marius
Marius, a research reactor (critical assembly) in Saint-Paul-les-Durance, France, with 400 W of thermal power, operated by CEN de Cadarache. Decommissioned, first critical in 1960.
It was one of the 38 research reactors France has had; 2 remain in operation today. It went critical 12 years after the first research reactor in France, ZOE (EL-1) (1948). 44 critical assemblies remain in operation today across 12 countries.
- Country
- France
- City
- Saint-Paul-les-Durance
- Type
- Critical assembly
- Thermal power
- 400 W
- Operator
- CEN de Cadarache
- Status
- Decommissioned
- First criticality
- 1960
See also: every research reactor in France · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026