Reactordle
Puzzle #89 was Obninsk Nuclear Power Plant.
Obninsk Nuclear Power Plant was built in the "Science City" of Obninsk, Kaluga Oblast, about 110Â km (68Â mi) southwest of Moscow, Soviet Union. Connected to the power grid in June 1954, Obninsk was the first grid-connected nuclear power plant in the world, i.e. the first nuclear reactor that produced electricity industrially, albeit at small scale. It was located at the Institute of Physics and Power Engineering.
Read about it on Wikipedia →
What the record says
Puzzle 89 ran on 12 Oct 2026 and the answer was Obninsk Nuclear Power Plant, played with 6 guesses against 4 columns. On the record: Country - Russia; Power band - <500 MW; Status - shutdown. The numbers: Grid connection - 1950s.
Beyond the grid the record adds Nominal power - 5 MW (<500 MW); First grid connection - 1954; Operator - Rosenergoatom.
Reactordle builds its record from Wikidata - CC0 1.0. The description above comes from the same place the game credits on every reveal: English Wikipedia verbatim extract plus sourced facts, CC BY-SA 4.0. The puzzle itself is still playable in the archive, and every answer that has been and gone is listed on the past-answers page.
How it scored
- Country
- Russia
- Power band
- <500 MW
- Grid connection
- 1950s
- Status
- shutdown
Also on the record
- Nominal power
- 5 MW (<500 MW)
- First grid connection
- 1954
- Operator
- Rosenergoatom