The Krško nuclear power plant, jointly owned by Slovenia and Croatia, produced 487,438 MWh of net electricity in September 2026. Output was 1.53% below the plant’s monthly production target for the month. The reported shortfall followed a plan to generate 495,000 MWh, implying an output gap of approximately 7,562 MWh.
Despite missing the September target, generation rose year on year. September output increased by around 8.5% compared with 449,426 MWh recorded in September 2025. In the same month last year, the plant also exceeded its planned output of 446,000 MWh by 0.77%.
Operating report shows full availability and capacity factors
The latest operating report stated that Krško remained within its technical operating specifications. It also said all safety systems were available during the reporting period. Both the availability factor and capacity factor were reported at 100%.
No technical problems were identified in the report for the period covered by the September generation figures. The data suggests that the production shortfall was not accompanied by a reported operational failure. However, the available information does not specify the precise cause of the difference between planned and actual electricity output.
Role in Slovenia and Croatia power systems
Krško is described as providing low-carbon baseload generation for both Slovenia and Croatia. Its output is intended to reduce reliance on fossil-fuelled production and imported power in regional electricity markets. The plant’s generation is particularly relevant when wind and solar output are reduced or when electricity demand increases.
Predictable nuclear production supports supply planning in both countries. It also contributes to managing wholesale electricity procurement requirements. The September results highlight how performance against a monthly generation plan can differ from broader operational reliability.
Although Krško fell modestly short of its September target, generation remained substantially above the corresponding month of 2025. No reported technical or safety-related interruption was associated with the month’s outcome. The operating result indicates a limited production variance rather than evidence of a material deterioration in plant reliability.
