United States · Golden, CO · 39.747, -105.211 (approximate location)

HST Horizontal Split Table

HST Horizontal Split Table, a research reactor (critical assembly) in Golden, CO, United States, with 1 W of thermal power, operated by Rocky Flats Environmental Technology Site. Decommissioned, first critical in 1965.

It was one of the 340 research reactors the United States has had; 48 remain in operation today. It went critical 23 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

Golden, CO

Type

Critical assembly

Thermal power

1 W

Operator

Rocky Flats Environmental Technology Site

Status

Decommissioned

First criticality

1965

Purpose

Nuclear data

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