United Kingdom · Aldermaston · 51.383, -1.150

Atlas

Atlas, a research reactor (critical assembly) in Aldermaston, United Kingdom, operated by Atomic Weapons Research Establishment. Decommissioned, first critical in 1952.

It was one of the 46 research reactors the United Kingdom has had; 1 remains in operation today. It went critical 5 years after the first research reactor in the United Kingdom, GLEEP (1947). 44 critical assemblies remain in operation today across 12 countries. Its declared uses include nuclear data measurements.

Country

United Kingdom

City

Aldermaston

Type

Critical assembly

Thermal power

critical

Operator

Atomic Weapons Research Establishment

Status

Decommissioned

First criticality

1952

Purpose

Nuclear data

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