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United States United States · Oak Ridge, TN · 35.930, -84.310

LITR Low Intensity Test

LITR Low Intensity Test, a research reactor (tank) in Oak Ridge, TN, United States, with 3 MW of thermal power, operated by Union Carbide Corporation. Shut down, first critical in 1950.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 8 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). 36 tank-type reactors remain in operation today across 23 countries. Its declared uses include nuclear data measurements and materials testing.

Country
United States
City
Oak Ridge, TN
Type
Tank
Thermal power
3 MW
Operator
Union Carbide Corporation
Status
Shut down
First criticality
1950
Purpose
Nuclear data, materials testing

Data: IAEA RRDB · updated on Sep 3, 2026

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