Mochovce 3&4 construction

  • one of the three projects of nuclear power plants currently under construction in Europe
  • the largest private investment in the history of Slovakia
  • 2/3 of works on site is performed by Slovak companies
  • 90% of the population around power plant is in favour of the completion of Units 3&4
  • each unit will have 471 MWe output
  • annual production of two units will save over 7 million tonnes of CO2 emissions

*** under construction ***

  • Fire protection lining and painting in auxiliary nuclear building
  • Civil readiness for foundations under pipe bridge
  • Concrete floor drainage in room A217
  • Transport and assembly of 7th section of spent fuel pool in Unit 4
  • Installation of instrumentation and control system cabinets
  • Welding of stainless-steel lining floors on Unit 4 in A201/2, A301/2
  • Grouting activities - works under the tripods of primary circuit of Unit 4
  • Assembly of penetrations on the shaft no. 1 of Unit 4
  • Concreting of floors and vertical elements in the vent stack
  • Modernization of main circulation pump 3, 6
  • Refurbishment of main circulation piping
  • Erection of diagnostic system on steam generator 6
  • Welding of support ring under core basket
  • Erection of removable part of main circulation pump 2-6
  • Three stand supports straining of main circulation pumps 1-6
  • Transport of frames and pumps of sprinkler and low pressure emergency injection system
  • Erection of bellows
  • Blowing through the steam generator 1
  • Commissioning of 110 kV back-up electric source
  • Concreting of Unit 3 reactor postament
  • Installation of 400kV electric switch yard
  • Fresh nuclear fuel storage prepared for technology installation
  • Assembly of all four steam turbines of Units 3 & 4 completed
  • Safe Enterprise certificate for SE-MO34 site
  • Refurbishment of internal walls of vent stack;
  • Refurbishment of roof of nuclear auxiliary building;
  • Refurbishment works of condensate tanks on the roof of auxiliary nuclear building;
  • Seismic reinforcement of reactor building;
  • Seismic reinforcement of internal walls of auxiliary nuclear building;
  • Refurbishment of internal walls of connecting bridge;
  • Installation of earthing networks of vent stack;
  • Civil readiness of the emergency room in a simulator building;
  • Hydrotest of spent fuel pool of Unit3 (shaft No. 1);
  • Grouting of mechanical equipments (primary coolant pumps);
  • Civil readiness for refurbishment of reactor upper block;
  • Refurbishment of hermetic and non-hermetic zone in reactor building (Unit 3,4);
  • Foundations for pipe bridge; 
  • Refurbishment of external walls of auxiliary nuclear building;
  • Internal seismic reinforcement of connection bridge;
  • Erection of fire protection lining in auxiliary nuclear building;
  • Concreting works on postament of unit 3;
  • Heavy concreting on postament of Unit 4;
  • Reinforcement on postament of Unit 4 around shaft no.1;
  • Concreting works around reactor pit of Unit 3;
  • Erection and welding of main circulation piping in the steam generator box;
  • Reactor pressure vessel of unit 4 transport and placement (2-3/12/2011);
  • First turbine of Unit 3 installation (December 2011).
  • Seismic reinforcement of reactor building roof;
  • Seismic reinforcement of external structures of reactor building;
  • Seismic reinforcement of steel structures of the turbine hall;
  • Erection of new bridge crane in turbine hall;
  • Refurbishment of turbines supports;
  • Seismic reinforcement of internal steel structures of auxiliary nuclear building;
  • Refurbishment of steam generators (unit 3);
  • Refurbishment of 250t crane in the reactor hall;
  • Reinforcement of roads, corridors and slabs for the reactor pressure vessel transport;
  • Refurbishment of auxiliary structures for transport of reactor pressure vessel;
  • Refurbishment of external walls of vent stack;
  • Refurbishment of cooling towers;
  • Reactor pressure vessel of unit 3 transport and placement (3-4/9/2010);
  • Refurbishment of anchoring structures of steam generators (unit 3);
  • Refurbishment of bubble condenser (unit 3);
  • Refurbishment of external walls of reactor building;
  • Removal of old moisture separators and reheaters (unit 3);
  • Refurbishment of hermetic penetrations;
  • Refurbished rooms in reactor building, number of rooms ready for mechanical erection:
    • Unit 3: 328 out of 353;
    • Unit 4: 197 out of 239.
  • Main nuclear island contracts, EPCM contract for the conventional island and main I&C Engineering contract were signed and activities have started;
  • Contractors' mobilization works completed (site services, site offices, ...);
  • Evaluation of existing components;
  • Refurbishment of reactor hall roof;
  • Seismic reinforcement of the external walls of the reactor building.