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Slovakia completes commissioning of the Mochovce nuclear plant Unit 3

The Slovakian power utility Slovenské elektrárne (SE) has fully completed the energy commissioning of the 440 MW third unit of the Mochovce nuclear power plant, following the completion of the last test in the active testing phase, namely a 144-hour demonstration operation at full reactor capacity. Unit 3 was first connected to the grid in late January 2023 and achieved 100% power for the first time in late September 2023.

The 1.9 GW Mochovce nuclear plant, located near Nitra in central Slovakia, consists of four VVER units. The first two units (500 MW each) were commissioned in 1998 and 2000. Construction on Units 3 and 4 started in 1987, was suspended in 1990 and resumed in 2009. The fourth unit (440 MW) is still under construction and should be commissioned in 2024. The plant is operated by SE and owned by the Slovakian government (34%), Enel (33%) and EPH (33%). Slovakia has another nuclear plant (Bohunice) comprising two 471 MW units.

At the end of 2021, nuclear represented 24% of Slovakia’s installed capacity with 2 GW and 52% of the country’s power generation with nearly 16 TWh.

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