Investment engineering represents the key area of our business. ŠKODA JS capitalizes on its many years of experience with large investment projects in the nuclear power industry throughout Europe. We provide a comprehensive variety of activities from project design to equipment commissioning.


The concept of engineering at ŠKODA JS encompasses a wide range of activities involved in the proper execution of every business case. Engineering covers activities from the early stages of a business case all the way up to its completion.

The main engineering activities include project management, budgeting and cost management, design, calculations and analyses, planning, procurement of subcontracts and deliveries of complex units, supply chain management and coordination, assembly and test management, the commissioning of supplied equipment, staff training and customer support during the warranty period.

Business cases also often require project financing. The full scale of the aforementioned activities is performed in projects in which ŠKODA JS acts as the general contractor or in deliveries of complex investment projects. In case of other types of contracts, only the appropriate types of activities are performed depending on the content and scope of the project.

We are a strategic and experienced partner

As a traditional and experienced supplier of nuclear technologies, we want to further develop our expertise and capabilities in our domain, which is mainly VVER-type nuclear power plants, whose technology we have mastered and which we are able to further develop throughout the project lifecycle – from design, calculation and analytical activities to the realization phase, including its thorough and qualified preparation, all the way to the commissioning of the supplied equipment. We also apply this knowledge to large projects and export contracts, such as our previous deliveries to Ukraine – the system of emergency containment depressurization or the sealing of ionizing chamber channels.

We have a number of interesting and often unique projects under our belt

Autokláv pro CV Řež

We maintain our technical readiness, among other things, through interesting smaller projects with unique technical characteristics, and we also evaluate their potential overreach from the nuclear power industry into the conventional power industry. One such example is the project of a solar loop verifying the possibility of converting solar energy into electricity using new media, a helium regeneration system, and a melting autoclave system – both with the potential to be used in the development of generation IV nuclear reactors, as well as the development of new ways of storing energy.

We have been behind a number of exceptional projects. In the area of engineering and deliveries of power plant safety and management systems, we implemented the project of the complete modernization of instrumentation and control systems at the Dukovany NPP. Between 2000 and 2018, during full operation of the power plant, we gradually replaced its entire safety, control and information system. This was done on schedule, within the set budget and using only regular maintenance and refueling outages, i.e., without requiring any long-term downtime of the nuclear units. This achievement is exceptional on a global scale.

We carry out various investment projects for nuclear power plants such as pipeline replacement and reconstruction, seismic reinforcement, polar crane modernization, repair of steam generator nozzles, repair of heterogeneous welds on steam generators and on pipelines according to customer requirements.

Our current goal is the involvement of ŠKODA JS in the construction of new nuclear units in Europe and the surrounding areas. We will seek to participate in planned nuclear power plant projects in Hungary, Poland and Finland, no matter whether they are traditional large power units or small modular reactors (SMRs), which have a great future ahead of them. We will certainly be involved in the construction of the new Czech nuclear units.

We also focus on supplies for modern conventional power plants

We are currently focusing on a complete “EPC” supply of power units in the field of conventional power engineering in prospective technologies such as gas power plants (single cycle) and steam power plants (combined cycle)

ŠKODA JS always builds on the requirements of the customer and the location in order to adapt the project to local legislation and to involve local design, production and assembly companies in the supply chain. With regard to customer requirements and specific conditions at the place of realization, we can use the following basic forms of project implementation / modification:

  • EPC – complete turn-key delivery of power units
  • Delivery of the project and technology, including installation, commissioning and guarantees without the civil part
  • Deliveries of complete technological units (business packages) in the areas of mechanical technology, electrical and control systems, including project documentation, installation and commissioning.

Our competitiveness is strengthened by the ability to provide the customer with financing both with commercial banks and Czech state institutions established to support exports (Czech Export Bank, a.s. and Export Guarantee and Insurance Company, a.s.)

ŠKODA JS, with its team of experienced experts, is a stable partner for customers, investors and specialized companies in this field.

Construction of VVER nuclear units - primary circuit system, fuel handling system

  • Project management
  • Detail design
  • Calculations and safety analyses
  • Research works
  • Component manufacture
  • On-site installation
  • Commissioning

Supply and modernization of nuclear unit I&C systems

  • Replacement of primary circuit control systems
  • Replacement of turbine control systems 
  • Replacement of secondary circuit control systems 
  • Complete replacement with modern digital systems
  • General interconnection of modernized systems with the current power plant equipment

EPC projects - comprehensive delivery of particular technological units

Computational analyses for nuclear power plants and technological plants

  • Neutron physics
  • Radiation safety
  • Thermohydraulics
  • Strength calculations including piping systems

Design activities

  • Project documentation of all stages
  • Laser scanning
  • Technical preparation of installations

Piping systems in the power industry

  • Project documentation of all stages
  • Supplies and installations

Owner’s Engineering activities

Spent fuel interim storage facilities

Construction of research and training reactors

Conventional power industry

  • Project management using modern SW tools
  • Project adaptation to local legislation
  • Development of all stages of project documentation
  • Procurement of deliveries, coordination of suppliers
  • Execution of assembly works, supervision during installation of delivered components
  • Coordination and supervision of commissioning
  • Warranty and post-warranty service
  • Spare parts
  • Project financing



ŠKODA JS - people I can rely on for many reasons.

Units 3 and 4 at Mochovce NPP, Slovakia

Units 3 and 4 at Mochovce NPP, Slovakia

  • The final supplier of the primary circuit and the fuel-handling part in both units under construction
  • Currently in the role of supplier of the power plant’s essential operating systems – the primary circuit, the fuel handling part, connecting pipes, intermediate cooling circuits, parts of the instrumentation and control system, and maintenance workshops.
  • One of the five main suppliers
  • Expert support provided to the investor in the areas of engineering, planning, licensing support, construction and assembly works and commissioning
  • Strength, seismic and lifetime calculations
NPP decommissioning projects

NPP decommissioning projects

  • Removal of steam generators
  • Transport of pressure vessels and reactor internals
I&C system refurbishment or replacement projects

I&C system refurbishment or replacement projects

  • Dukovany NPP (2002-2017)
  • Paks NPP, Hungary (2015-2019)
  • Metsamor NPP, Armenia (2017-2019)
  • Temelín NPP (2011-2016)
Nuclear power plants in Ukraine

Nuclear power plants in Ukraine

  • Investment projects
  • The capping of channels of ionization chambers – equipment production, assembly supervision, and training for operating staff
  • Emergency containment depressurization (Venting)
  • The project of refurbishment of a part of the I&C systems – a unified technology set for the Zaporozhye NPP
Dukovany nuclear power plant, Czech Republic

Dukovany nuclear power plant, Czech Republic

  • The final supplier of the primary circuit and the fuel-handling part in all four units at the nuclear power plant
  • General contractor for the unique project of the complete I&C systems replacement in full operation
  • Reconstruction of the ancillary switchboards
  • Strength, seismic and lifetime calculations
Temelín nuclear power plant

Temelín nuclear power plant

  • The final supplier of the primary circuit and the fuel handling part in both units
  • Control system refurbishment projects
  • Strength, seismic and lifetime calculations
  • The capping of channels of ionization chambers – equipment production, assembly supervision, and training for operating staff
Units 1 and 2 at Mochovce NPP, Slovakia

Units 1 and 2 at Mochovce NPP, Slovakia

  • The final supplier of the primary circuit and the fuel handling part in both operated units
  • Construction documents
  • Component production and assembly
  • Assembly on site
  • Commissioning
Paks nuclear power plant, Hungary

Paks nuclear power plant, Hungary

  • Reactor production and assembly supervision in all four units of the nuclear power plant
  • General contractor for the project of instrumentation and control system replacement
Bohunice V2 nuclear power plant

Bohunice V2 nuclear power plant

  • The final supplier of the primary circuit and the fuel handling part
  • Calculations – the Scorpio reactor core monitoring system


  • Spatial coordination at the Mochovce and Dukovany NPPs
  • Modernization of the polar bridge crane in Units 1 and 2 at the South Ukraine NPP
  • Emergency containment depressurization (Venting) at Ukrainian nuclear power plants
  • Cask for leaky spent fuel for the Temelín NPP
  • Deep disposal - end of fuel cycle
  • Science and research
  • Hněvkovice Hydroelectric Plant
Mechanical Design

Mechanical Design

  • Complex engineering activities – conducting studies and preparing construction documents, calculations, production technical drawings and calculations
  • Support for the assembly of the piping systems at the Mochovce NPP
  • The “Reconstruction of the Main Pipelines and Safety Valves of the Pressurizer System” project at the Temelín NPP
  • The “Emergency Containment Depressurization (Venting) at Ukrainian Nuclear Power Plants” project
  • Development of new hermetic penetrations


  • Strength and lifetime
  • Radiation safety
  • Thermo-hydraulics
  • Physics
Research, training and experimental reactors

Research, training and experimental reactors

  • Experimental, research and training reactors
  • Complete turnkey projects
  • Reactor control system refurbishment
CMIS.CE System

CMIS.CE System

  • Configuration and preparation of “smart data”
  • Management, validation and exchange of data between subcontractors, the general contractor and the customer
  • Developed by ŠKODA JS in cooperation with the Hexagon Company
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