United Kingdom · Thurso · 58.596, -3.521 (approximate location)

Sirius

Sirius, a research reactor (critical assembly) in Thurso, United Kingdom, with 100 W of thermal power, operated by Dounreay Nuclear Power Development Establishment. Decommissioned, first critical in 1961.

It was one of the 46 research reactors the United Kingdom has had; 1 remains in operation today. It went critical 14 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 innovative research.

Country

United Kingdom

City

Thurso

Type

Critical assembly

Thermal power

100 W

Operator

Dounreay Nuclear Power Development Establishment

Status

Decommissioned

First criticality

1961

Purpose

Innovative research

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