United States · Upton, NY · 40.869, -72.887 (approximate location)

FS-1 Brookhaven Fast Source

FS-1 Brookhaven Fast Source, a research reactor (critical assembly) in Upton, NY, United States, with 1 kW of thermal power, operated by Brookhaven National Laboratory. Decommissioned, first critical in 1967.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 25 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 nuclear data measurements.

Country

United States

City

Upton, NY

Type

Critical assembly

Thermal power

1 kW

Operator

Brookhaven National Laboratory

Status

Decommissioned

First criticality

1967

Purpose

Nuclear data

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