United States · Idaho Falls, ID · 43.511, -113.006

EBR-I

EBR-I, a research reactor (fast) in Idaho Falls, ID, United States, with 1.2 MW of thermal power, operated by Argonne West National Laboratory. Decommissioned, first critical in 1951.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 9 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). 15 fast research reactors remain in operation today across 6 countries. It is one of 3 research reactors in 1 country that Argonne designed or built.

Country

United States

City

Idaho Falls, ID

Type

Fast

Thermal power

1.2 MW

Operator

Argonne West National Laboratory

Design and construction

Designed and built by Argonne National Laboratory

Status

Decommissioned

First criticality

1951

Purpose

Innovative research, materials testing

See also: every research reactor in United States · How research reactors work · every reactor by Argonne