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United States United States · Middletown, CT · 41.562, -72.651 (approximate location)

CANEL Critical Assembly

CANEL Critical Assembly, a research reactor (critical assembly) in Middletown, CT, United States, with 1 W of thermal power, operated by Connecticut Aircraft Nuclear Engine Laboratory. Decommissioned, first critical in 1957.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 15 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). 44 critical assemblies remain in operation today across 12 countries. Its declared uses include materials testing.

Country
United States
City
Middletown, CT
Type
Critical assembly
Thermal power
1 W
Operator
Connecticut Aircraft Nuclear Engine Laboratory
Status
Decommissioned
First criticality
1957
Purpose
Materials testing

Data: IAEA RRDB · updated on Sep 3, 2026

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