Mechanical Design

Mechanical Design

In 2014, ŠKODA JS a.s. opened its design office in Prague focusing on the field of “Piping Systems Engineering“. Its team was made up of experienced designers who until then had cooperated with ŠKODA JS a.s. on the project “Completion of Units 3 and 4 at the Mochovce Nuclear Power Plant“.

Práce projekčního týmu

Its team members are mostly experienced specialists, some of whom have worked in the power industry for decades. The establishment of the new department of mechanical design expanded the competence of ŠKODA JS a.s. in the area of piping systems, including comprehensive engineering activities from preparing studies, construction documents and calculations, to production drawings and calculation documentation.

In 2015, the Piping Systems Engineering design office dealt mostly with the “Completion of Units 3 and 4 at the Mochovce Nuclear Power Plant” project. The designers participated mainly in the resolution of data collisions, including the performance of operational checking calculations for piping and accessories. A 3D coordination model for Unit 4 was completed and revisions of assembly isometric drawings, layout drawings and auxiliary steel structures were performed. The purpose of all the changes to the geometry of the piping systems is to significantly speed up and increase the accuracy of the subsequent assembly in Unit 4.

The team of designers has also worked on other projects, mainly for Czech nuclear units. At Dukovany, the projects “Reinforcement of the Primary Circuit Safety Valves”, “Reconstruction of the Main Safety Valves” and “Emergency Feedwater System Pipelines Calculation” were completed. The projects completed at the Temelín NPP include “Reconstruction of the Main Pipelines and Safety Valves of the Pressurizer System Including the Hydrogen Removal System Calculation” and “Supporting Documentation Calculation of the Essential Service Water Reconstruction”. For the AF-Consult Czech Republic s.r.o. Company, a number of calculations of piping components for the Brazilian project Angra III were performed.

Práce s 3D modelem

In 2016, the activities of the design office, already under the new name “Mechanical Design Praha”, were related primarily to the project “Completion of Units 3 and 4 at the Mochovce NPP”, especially to supporting the realization of the project and to the preparation of as-built drawings of Unit 3, including use of the 3D laser scanning method. Installation works were carried out at Unit 4, with broad application of the 3D coordination model, which is updated using 3D scanning taken on a regular basis.

At Dukovany NPP, the projects “Emergency Feedwater System Pipelines Calculation” were completed. Temelín NPP saw the continuation of the projects “Supporting Documentation Calculation of the Essential Service Water Reconstruction” and “Reconstruction of the Main Pipelines and Safety Valves of the Pressurizer System”. Although the latter of the two projects commenced in 2015, the customer considerably expanded the scope of the contract, which resulted in an extension of the project until 2017.

In 2017, the Mechanical Design Praha team continued to provide support for completion of the assembly of the piping systems in Unit 3 at the Mochovce NPP, where at the end of the year the main pressure tests commenced. At the same time, the documentation on the actual state was prepared, including the final strength, seismic and lifetime calculations. The assembly of the piping systems and their preparation for flushes took place in Unit 4 of the Mochovce NPP.

Projekční práce na systému Venting

The team of designers also successfully continued in the realization of other projects for ČEZ, a.s., and ÚJV Řež, a.s., for example, completion of the project “Reconstruction of the Main Pipelines and Safety Valves of the Pressurizer System” at the Temelín NPP; replacement of the injection control valve in the pressurizer system at the Temelín NPP; hydraulic calculation of non-essential service water at the Temelín NPP; strength calculations for additional essential service water reconstruction at the Temelín NPP; strength calculation for the project “Concentrated Solar Power” for ÚJV Řež. Realizations abroad included projects on VVER units – design of the new Venting system at the Zaporozhye NPP (Ukraine), development of new hermetic penetrations for a bid for the Akkuyu NPP (Turkey) and the Hanhikivi NPP (Finland).

Even in the following years, the project team still has the most extensive work for the project „Completion of Units 3 and 4 of the Mochovce NPP“. However, the design team also implements a number of other projects, especially for Slovenské elektrárne, a.s., ČEZ, a. S., I&C Energo a.s., Institute of Applied Mechanics Brno, s.r.o., and NAEK Energoatom (Ukraine). For example:

  • Seismic evaluation of large components for the Mochovce NPP, including the commencement of works on implementation projects.
  • Stage 1 of the project for the replacement of measuring orifices and separators at the Mochovce NPP.
  • Design and delivery of parts for the steam bench for the Temelín NPP.
  • Documentation on the actual state and strength calculations for steam pipes and power supply in the engine room of the Dukovany NPP.
  • Strength calculations for additional essential service water reconstruction at the Temelín NPP.
  • Sensitivity analysis, calculation report and technical report – elimination of vibrations of the main circulation pump at the Bohunice NPP.
  • Design and calculations for the refurbishment of the main safety valves assembly at the Temelín NPP.
  • Design and delivery of a system for emergency containment depressurization (Venting) at Ukrainian nuclear power plants.

The history of our cooperation

ŠKODA JS otevřela v Praze novou projekční kancelář

2014ŠKODA JS opened a new mechanical design office in Prague

3. blok JE Mochovce ve výstavbě

since 2015we have been working on the “Completion of Units 3 and 4 at the Mochovce Nuclear Power Plant” project

JE Temelín

2015-2017the project “Reconstruction of the Main Pipelines and Safety Valves of the Pressurizer System Including the Hydrogen Removal System Calculation” at the Temelín NPP

hist_4

2015the projects “Reconstruction of the Main Safety Valves” and “Reinforcement of the Primary Circuit Safety Valves” at the Dukovany NPP, and the project “Supporting Documentation Calculation of the Essential Service Water Reconstruction” at the Temelín NPP

JE Temelín

2016the projects “Emergency Feedwater System Pipelines Calculation” at the Dukovany NPP and the project “Supporting Documentation Calculation of the Essential Service Water Reconstruction” at the Temelín NPP

2017the projects “Replacement of the Injection Control Valve in the Pressurizer System”, “Hydraulic Calculation of Non-essential Service Water at the Temelín NPP”, “Strength Calculations for Additional Essential Service Water Reconstruction” at the Temelín NPP; design of the new Venting system at the Zaporozhye NPP (Ukraine), development of new hermetic penetrations for a bid for the Akkuyu NPP (Turkey) and the Hanhikivi NPP (Finland)

2018-2020projects for the companies Slovenské elektrárne, a.s., ČEZ, a. s., I&C Energo a.s., the Institute of Applied Mechanics Brno, and NAEK Energoatom (Ukraine)