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

SNAP 2 Demonstration Reactor

SNAP 2 Demonstration Reactor, a research reactor (other) in Simi Valley, CA, United States, with 65 kW of thermal power, operated by Santa Susana Field Laboratory. Decommissioned, first critical in 1961.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 19 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
65 kW
Operator
Santa Susana Field Laboratory
Status
Decommissioned
First criticality
1961

Data: IAEA RRDB · updated on Sep 3, 2026

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