United States United States · Simi Valley, CA · 34.270, -118.746 (approximate location)

SNAP Experimental Reactor

SNAP Experimental Reactor, a research reactor (other) in Simi Valley, CA, United States, with 50 kW of thermal power, operated by Santa Susana Field Laboratory. Decommissioned, first critical in 1959.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 17 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942).

Country
United States
City
Simi Valley, CA
Type
Other
Thermal power
50 kW
Operator
Santa Susana Field Laboratory
Status
Decommissioned
First criticality
1959

Data: IAEA RRDB · updated on Sep 3, 2026

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