• Issuance of the first-instance decision for Unit 4.
• Start of physical start-up testing, including fuel loading.
• Achievement of first criticality and attainment of minimum controlled reactor power.
• Start of power start-up testing, including testing at multiple power levels and synchronisation of the turbine generators with the electricity grid.

• Minor outage at Unit 4.
• Hot hydrostatic test at Unit 4.
• Extended outage at Unit 4

Cold hydrostatic test at Unit 4.

Power start-up, including first synchronisation to the grid, at Unit 3.

Start of physical start-up testing, including fuel loading, at Unit 3.

Hot hydrostatic test at Unit 3.

Cold hydrostatic test at Unit 3.

Pressure tests of the Unit 3 primary circuit.

• Completion of construction works on Unit 3.
• Trial assembly of reactor internals.
• Functional testing of the fresh fuel storage facility completed.

• Installation of 36,000 new anchoring plates on Unit 3 completed.
• Commissioning of the Unit 3 main control room.

• Acceptance of the full-scope simulator and commencement of operator training.
• Installation of the Unit 3 main control room panels completed.

• Completion of system installation works on both units, including the main steam pipeline and steam generator feedwater piping at Unit 3, and the main circulation pump at Unit 4.
• Energisation of the Unit 3 instrumentation and control power supply system.
• Post-Fukushima measures incorporated into and approved for the Units 3 and 4 project.

Installation of the Unit 3 turbine, installation of active and passive safety systems, refurbishment of the fresh fuel storage facility, completion of concreting of the Unit 3 reactor pedestal, and energisation of the backup 110 kV transmission line.

Continuation of construction and installation works, including installation of the Unit 4 reactor pressure vessel.

Intensive construction activities, including refurbishment of structures and buildings in both the nuclear and conventional islands, seismic reinforcement of reactor building and auxiliary building walls, and installation of the Unit 3 reactor pressure vessel.

Signing of contracts with key suppliers: Škoda JS, Atomstroyexport, VÚJE, Enseco, Inžinierske stavby Košice, and Enel Ingegneria & Innovazione.

The Nuclear Regulatory Authority of the Slovak Republic granted Slovenské elektrárne approval to implement modifications to selected MO34 equipment affecting nuclear safety pursuant to Atomic Act No. 541/2004.

• During the preparatory phase, it was necessary to obtain European Union investment approval pursuant to Article 41 of the Euratom Treaty.
• Preparation of the Environmental Impact Assessment (EIA) study for the proposed activity by the Canadian company Golder Associates.

• Following the privatisation of Slovenské elektrárne by Enel, the majority shareholder decided to complete Mochovce NPP Units 3 and 4.
• A proposal was prepared for modifications to the civil and technological design of Units 3 and 4 so that the new units would comply with contemporary international nuclear safety requirements.

A conservation programme for incomplete units and equipment was implemented to maintain them in good condition should a future decision be taken to complete their construction.

radual slowdown of work on the project due to a lack of financing.

Start of construction of Mochovce NPP Units 3 and 4.