United Kingdom · Harwell · 51.570, -1.328

PLUTO

PLUTO, a research reactor (heavy water) in Harwell, United Kingdom, with 26 MW of thermal power, operated by Atomic Energy Research Establishment. Shut down, first critical in 1957.

It was one of the 46 research reactors the United Kingdom has had; 1 remains in operation today. It went critical 10 years after the first research reactor in the United Kingdom, GLEEP (1947). 10 heavy-water research reactors remain in operation today across 7 countries.

Country

United Kingdom

City

Harwell

Type

Heavy water

Thermal power

26 MW

Operator

Atomic Energy Research Establishment

Status

Shut down

First criticality

1957

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