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UV-1

UV-1, a research reactor (subcritical assembly) in Moscow, Russia, operated by Moscow Engineering Physics Insitute MEPhI. Decommissioned, first critical in 1983.

It was one of the 123 research reactors Russia has had; 57 remain in operation today. It went critical 37 years after the first research reactor in Russia, F-1 (1946). 20 subcritical assemblies remain in operation today across 13 countries. Its declared uses include teaching.

Country
Russia
City
Moscow
Type
Subcritical assembly
Thermal power
critical
Operator
Moscow Engineering Physics Insitute MEPhI
Status
Decommissioned
First criticality
1983
Purpose
Teaching

Data: IAEA RRDB · updated on Sep 3, 2026

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