France France · Fontenay-aux-Roses · 48.789, 2.289

Triton

Triton, a research reactor (pool) in Fontenay-aux-Roses, France, with 6.5 MW of thermal power, operated by CEA Fontenay-aux-Roses. Decommissioned, 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). 48 pool-type reactors remain in operation today across 28 countries.

Country
France
City
Fontenay-aux-Roses
Type
Pool
Thermal power
6.5 MW
Operator
CEA Fontenay-aux-Roses
Status
Decommissioned
First criticality
1959

Data: IAEA RRDB · updated on Sep 3, 2026

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