Switzerland · Villigen · 47.538, 8.227

PROTEUS

PROTEUS, a research reactor (critical assembly) in Villigen, Switzerland, with 1 kW of thermal power, operated by Paul Scherrer Institut (PSI). Shut down, first critical in 1968.

It was one of the 6 research reactors Switzerland has had; 1 remains in operation today. It went critical 11 years after the first research reactor in Switzerland, SAPHIR (1957). 44 critical assemblies remain in operation today across 12 countries. Its declared uses include materials testing.

Country

Switzerland

City

Villigen

Type

Critical assembly

Thermal power

1 kW

Operator

Paul Scherrer Institut (PSI)

Status

Shut down

First criticality

1968

Purpose

Materials testing

See also: every research reactor in Switzerland · How research reactors work