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United States United States · Windsor, CT · 41.853, -72.643 (approximate location)

NUSU Advanced Critical Experiment

NUSU Advanced Critical Experiment, a research reactor (critical assembly) in Windsor, CT, United States, with 1 W of thermal power, operated by CE Windsor Site. Decommissioned, first critical in 1960.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 18 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 innovative research and materials testing.

Country
United States
City
Windsor, CT
Type
Critical assembly
Thermal power
1 W
Operator
CE Windsor Site
Status
Decommissioned
First criticality
1960
Purpose
Innovative research, materials testing

Data: IAEA RRDB · updated on Sep 3, 2026

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