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Krško NPP, steam generators replacement and plant uprating



Size or capacity

Increased power of the generator: 707 MW, increased power of the plant: 676 MW

Investor / Client


Time period


Description of Facility and Services

The Krško Nuclear Power Plant has been designed in compliance with technical and safety regulations of the United States. Updating and developing legislation, practice and experience constantly oblige the Krško NPP to plan modernization and replacement of equipment thus providing safe operation as well as prolongation of the plant life cycle.

In the Krško NPP the operation started in 1981 while commercially speaking the plant’s operation began in 1983. After extensive preparatory work including complete testing regulated by law, the Krško NPP decided to replace the existing steam generators with technologically updated equipment and in the same time to take the opportunity and increase the power of the plant. This goal was achievable due to the fact that at the Krško NPP construction stage, a structure with an enhanced turbo-aggregate and suitable auxiliary equipment was built. So, in 2000, the project of the Krško NPP steam generators replacement took place. These generators actually represent a kind of heat exchangers between the primary and the secondary part of the plant. Along with the replacement, the generator power was increased from the then 664 MW to 707 MW, while the plant net power increased from 632 MW to 676 MW. Consequently, the NPP yearly power output in the order of magnitude of 5 TWh was provided which represented a share of nearly 40% of the overall electrical energy produced in Slovenia.

Pursuant to all preliminary works and documentation IBE developed a Feasibility Study and a Design For Obtaining Construction Permit. Besides, the Company rendered consulting services and elaborated a Final Report on the installed equipment testing, performed by due authorized institutions.

IBE d.d., Hajdrihova ulica 4, SI-1001 Ljubljana, Slovenia
Telephone: +386 1 4776 100

Certified ISO 9001 BY BUREAU VERITAS Certification

Contact© IBE