Mochovce unit 3 is a VVER-440/V-213 pressurised water reactor of about 471 MWe at the Mochovce plant in Slovakia, operated by Slovenské elektrárne. Work on units 3 and 4 began in 1986 (World Nuclear News; other sources give 1985 or 1987) and stalled in the 1990s before resuming. The unit reached first criticality on 22 October 2022, was connected to the grid on 31 January 2023 and completed commissioning, with the announcement made on 17 October 2023. It supplies about 13 percent of Slovakia's electricity. Unit 4 followed, connected to the grid on 15 October 2026.