United States United States · Tuxedo, NY · 41.222, -74.186 (approximate location)

UCNR Union Carbide

UCNR Union Carbide, a research reactor (pool) in Tuxedo, NY, United States, with 5 MW of thermal power, operated by Union Carbide Nuclear Company. 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). 48 pool-type reactors remain in operation today across 28 countries. Its declared uses include isotope production.

Country
United States
City
Tuxedo, NY
Type
Pool
Thermal power
5 MW
Operator
Union Carbide Nuclear Company
Status
Decommissioned
First criticality
1961
Purpose
Isotope production

Data: IAEA RRDB · updated on Sep 3, 2026

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