Slovenia - World Nuclear Performance Report

Slovenia has a single reactor operating at Krško, about 40 km northeast of Zagreb. It is a two-loop Westinghouse PWR with a net capacity of 688 MWe. The plant’s operating company Nuklearna Elektrarna Krško (NEK) is
jointly owned by Slovenian state-owned company Gen-Energija and Croatian state-owned company Hrvatska Elektroprivreda (HEP).

In October 2023 the Krško plant was shut down after discovery of a leak in the primary circuit connection system. NEK said that following investigation, a decision was made to replace the complete pipeline segment from
the reactor vessel to the first valve. While the shutdown took place, activities for the scheduled shutdown in 2024 were brought forward. The unit returned to service at the end of November.

Slovenia has plans to build a new nuclear power plant – the JEK2 project – with a capacity of up to 2400 MWe. It is to be sited near the existing plant at Krško. In January 2024 the country’s prime minister held a meeting with opposition party leaders and members of parliament from Hungary and Italy stating that Slovenia’s long-term use of nuclear energy “requires the broadest national and political consensus.” The cross-party summit agreed on the need for both renewables and nuclear energy as part of the “path to a carbon-free future.” A referendum on nuclear energy will now take place later in 2024, with a final investment decision on JEK2 targeted for 2028.

Nuclear electricity production by age of reactor