United States · Chicago, IL · 41.792, -87.601

CP-1, Chicago Pile 1

CP-1, Chicago Pile 1, a research reactor (graphite) in Chicago, IL, United States, with 200 W of thermal power, operated by University of Chicago Metallurgical Laboratory. Decommissioned, first critical in 1942.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It was the first research reactor in the United States to go critical. 4 graphite-moderated research reactors remain in operation today across 3 countries. Its declared uses include nuclear data measurements.

Country

United States

City

Chicago, IL

Type

Graphite

Thermal power

200 W

Operator

University of Chicago Metallurgical Laboratory

Status

Decommissioned

First criticality

1942

Purpose

Nuclear data

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