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United States United States · Lemont, IL · 43.533, -112.945 (approximate location)

EBWR

EBWR, a research reactor (other) in Lemont, IL, United States, with 100 MW of thermal power, operated by Argonne National Laboratory. Decommissioned, first critical in 1956.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 14 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). Its declared uses include innovative research.

Country
United States
City
Lemont, IL
Type
Other
Thermal power
100 MW
Operator
Argonne National Laboratory
Status
Decommissioned
First criticality
1956
Purpose
Innovative research

Data: IAEA RRDB · updated on Sep 3, 2026

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