United States · Idaho Falls, ID · 43.494, -112.006 (approximate location)

ETR Engineering Test Reactor

ETR Engineering Test Reactor, a research reactor (tank) in Idaho Falls, ID, United States, with 175 MW of thermal power, operated by EG&G Idaho, Inc.. Decommissioned, first critical in 1957.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 15 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

Idaho Falls, ID

Type

Tank

Thermal power

175 MW

Operator

EG&G Idaho, Inc.

Status

Decommissioned

First criticality

1957

Purpose

Nuclear data, materials testing

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