Slovak VVER-440 unit (471 MWe, about 13% of Slovakia's current consumption) at Mochovce, operated by Slovenské elektrárne. Construction began in 1986 and stalled in 1992. Criticality was reached on August 6, 2026 and physical start-up followed in September; the unit connected to the grid on October 15, 2026 at 20% power after a two-day delay. A second turbogenerator must still be connected and tests completed at each power level, ending with a 144-hour run at 100%; no commercial operation date has been given. Completing Units 3 and 4 was estimated at EUR 6.7 billion; Unit 3 entered commercial operation in October 2023. The record date is the grid connection.