Rapsodie was an experimental nuclear reactor built in Cadarache in France.
It was France's first fast reactor, and first achieved criticality in 1967.
Rapsodie was a sodium-cooled fast neutron loop-type reactor with a thermal output of 40MW and no electrical generation facilities, and closed in 1983.
[1] Rapsodie was operated in conditions considered representative of a commercial plant in terms of temperatures (inlet 400 °C (752 °F), outlet 550 °C (1,022 °F)) and neutron flux (3.2e15n/cm^2/s), and served to prove many elements used in later, larger, breeder reactors.
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