United States · Los Alamos, NM · 43.533, -112.945 (approximate location)

Fran

Fran, a research reactor (fast) in Los Alamos, NM, United States, with 1 W of thermal power, operated by Lawrence Livermore National Laboratory. Decommissioned, first critical in 1962.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 20 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. Its declared uses include nuclear data measurements.

Country

United States

City

Los Alamos, NM

Type

Fast

Thermal power

1 W

Operator

Lawrence Livermore National Laboratory

Status

Decommissioned

First criticality

1962

Purpose

Nuclear data

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