The Krško nuclear power plant, jointly owned by Slovenia and Croatia, generated 495,096 MWh of net electricity in June 2026, exceeding its monthly production plan by approximately 1%.
Planned output for the month was 490,000 MWh. The result was also higher than the 491,609 MWh produced in June 2025, when generation exceeded the corresponding target by 0.33%.
Krško reported an availability factor and capacity factor of 100%, with no technical problems affecting production. The plant operated within its technical specifications and all safety systems remained available.
The result is commercially significant for both national electricity systems. Krško’s output is shared between Slovenia and Croatia, providing each country with a stable block of baseload power that reduces exposure to short-term imports and volatile fossil-fuel generation.
Monthly production of 495,096 MWh corresponds to an average net output of approximately 688 MW. This indicates that the plant operated close to its effective net capacity throughout the month.
Nuclear availability carries particular value during the summer. Higher cooling demand and lower regional hydropower output can tighten the Southeast European balance, while solar production falls rapidly during the evening. Continuous Krško generation reduces the volume Slovenia and Croatia must secure from neighbouring markets during those periods.
The plant’s performance also supports regional price stability. A forced outage at a unit of this size would immediately increase import requirements across Slovenia and Croatia and could affect flows from Austria, Hungary, Italy and the western Balkans.
Krško is one of the most important jointly owned energy assets in Southeast Europe. Its operating performance influences not only the finances of the Slovenian and Croatian utilities but also congestion and price formation across the surrounding interconnected markets.
The June result provides a strong operational contribution, although nuclear economics must be assessed over complete fuel and maintenance cycles rather than a single month. Planned refuelling outages and long-term investment requirements remain the decisive variables in annual availability and cost.
