United States · West Mifflin, PA · 40.368, -79.897 (approximate location)

Bettis PWR Flexible Assembly

Bettis PWR Flexible Assembly, a research reactor (critical assembly) in West Mifflin, PA, United States, with 1 W of thermal power, operated by Bettis Atomic Power Laboratory. Decommissioned, first critical in 1955.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 13 years after the first research reactor in the United States, CP-1, Chicago Pile 1 (1942). 44 critical assemblies remain in operation today across 12 countries. Its declared uses include materials testing.

Country

United States

City

West Mifflin, PA

Type

Critical assembly

Thermal power

1 W

Operator

Bettis Atomic Power Laboratory

Status

Decommissioned

First criticality

1955

Purpose

Materials testing

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