PROTEUS
PROTEUS, a zero-power critical assembly, was located at the Paul Scherrer Institut (PSI) in Villigen, Switzerland. It played a key role in reactor physics and criticality experiments for civilian nuclear research until its permanent shutdown in 2011. With a thermal power of just 0.001 MWth, it suppo
Key Stats
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PROTEUS
Status: SHUTDOWN_PERMANENT Category: RESEARCH Country: Switzerland Switzerland Operator: psi--paul-scherrer-institut Type: Zero power [Zero power](/library/wiki/technologies/Zero power) Capacity: 0.001 MWth (thermal only)
Overview
PROTEUS, a zero-power critical assembly, was located at the Paul Scherrer Institut (PSI) in Villigen, Switzerland. It played a key role in reactor physics and criticality experiments for civilian nuclear research until its permanent shutdown in 2011. With a thermal power of just 0.001 MWth, it supported foundational studies in nuclear science.
Key Facts
Notes
PSI Villigen. Zero-power critical assembly. Permanently shut down 2011.
Source: IAEA PRIS / reactors_canonical · Enriched by Grok Last updated: 2026-05-10
Sources
- Paul Scherrer Institut (PSI) — Official website of the operator, providing information on research facilities including PROTEUS.
- World Nuclear Association - Switzerland — Country profile with details on nuclear research and facilities in Switzerland.
- Wikipedia - PROTEUS Reactor [UNVERIFIED]) — Wikipedia page dedicated to the PROTEUS zero-power critical assembly.
Sources (1)
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