Bohunice Nuclear Power Plant

Bohunice V2 Nuclear Power Plant is located in Western Slovakia near to Trnava. Electricity is generated there in two units with VVER 440/V-213 pressurised water reactors, which were commissioned in 1984 and 1985 respectively.

The V2 power plant changed to combined generation of electricity and heat after building up the centralised heat supply system from Bohunice NPP to Trnava in 1987. Detour from the Trnava heat supply line also heats Leopoldov, Hlohovec and Jaslovské Bohunice.

Since 2000 a modernisation programme amounting to 500 mil. eur was implemented at V2 units, and was completed in 2010 by power increase up to 506 MWe (gross) per unit.

Assets of the A1 and V1 nuclear power plants together with the high level radioactive waste interim repository in the area of Jaslovské Bohunice have been spun off the property of Slovenské elektrárne shortly before Enel acquired the 66% stake in the Slovak power utility.

1958: Start of works on Bohunice NPP A1 1958
Start of works on Bohunice NPP A1.
Commissioning of Bohunice NPP A1.
Start of construction works at Bohunice NPP V1.
1972: Start of construction works at Bohunice NPP V1
1977: Bohunice NPP A1 operation terminated 1 976
Start of construction works at Bohunice NPP V2.

Bohunice NPP A1 operation terminated.
Commissioning of Unit 1 at Bohunice NPP V1.

Commissioning of Unit 2 at Bohunice NPP V1.
1978: Commissioning of Unit 1 at Bohunice NPP V1
1984: Commissioning of Unit 1 at Bohunice NPP V2 1984
Commissioning of Unit 1 at Bohunice NPP V2.

Commissioning of Unit 2 at Bohunice NPP V2.
Start of V2 modernisation and safety upgrading.
2006: Operation of Unit 1 terminated at Bohunice NPP V2 2006
Enel acquired 66% of Slovenské elektrárne.
Unit 1 operation terminated at Bohunice NPP V1.
Start of Bohunice NPP V2 power up-rate.
Completion of Bohunice NPP V2 modernisation and safety upgrading.
Unit 2 operation terminated at Bohunice NPP V1.

Bohunice NPP V2 power uprate (114%) completed
2010: Bohunice NPP V2 power up-rate completed
Number of reactor units 2
Power plant installed capacity 2 x 506 MW
Heat capacity of the reactors 2 x 1,471.25 MWt
Reactor type VVER 440/V-213
Coolant and moderator demineralised water
Reactor pressure vessel
- diameter 3,840 mm
- height 11,800 mm
Wieight 215 t
Material carbon low-alloyed steel
- diameter 2,880 mm
- height 2,500 mm
Number of fuel assemblies 312
Shape hexagonal
Diameter 145 mm
Height 3,200 mm
Number of fuel rods per assembly 126
Diameter 9.1 mm
Height 2,500 mm
Cladding zirconium and niobium alloy
Number of regulating assemblies 37
Shape hexagonal
Diameter 145 mm
Core fuel weight 43.8 t
Input cooling water temperature 268 °C
Output water temperature 298 °C
Water pressure 12.26 Mpa
Steam generator
Number of steam generators per unit 6
Lenght 11,800 mm
Diameter 3,210 mm
Weight 145 t
Steam capacity 483 t/h
Steam pressure 4.6 Mpa
Steam temperature 260 °C
Feed water temperature 223 °C
Number of heat transfer tubes 5,536
Heat transfer surface 2,510 m2
Main circulating pump (MCP)
Number of MCP´s per unit 6
Electric motor power input 2 MW
Voltage 6 kV
Rotational speed 1,500 rpm
Coolant flow rate 7,133 m3/h
Conventional Island
Turbo generator (TG)
Number of TG´s per unit 2
Rated output 253 MW
Rotational speed 3,000 rot./min.
Steam temperature (HP) 256 °C
Steam pressure (HP) 4.3 Mpa
Steam temperature (LP) 216.5 °C
Steam pressure (LP) 0.363 Mpa
Output voltage 15.75 kV
Cooling water/hydrogen
Number of condensing bodies 2
Design two-part, two-chamber
Cooling water quantity 35,000 m3/h
Maximum cooling water temperature 33 °C
Number of heat transfer tubes 29,480
Heat transfer surface 16,300 m2
Condenser cooling method circulating, cooling towers with natural draught
Cooling towers
Number of cooling towers 4
Height 120 m
Lower diameter 84.4 m
Upper diameter 53 m

Monitorovacie staničky EBONuclear power plants emit no greenhouse gas to the atmosphere, in this way NPPs annually contribute to CO2 emission reduction by 15 million tonnes in Slovakia.

Nuclear power plants hence contribute significantly to the obligation to reduce emissions of harmful greenhouse gas to the atmosphere.

Bohunice V2 NPP meets all international requirements and that the operation impact is minimal.

Water required for cooling is taken from a water dam Slnava built on the nearby Vah river, which ensures sufficient supply of water even in extremely dry climate conditions. The impact of the discharged waters on the quality of the river water, fauna and flora is negligible.

Emissions to the atmosphere and effluents to the hydrosphere are regularly measured and assessed in the 15-km area around the plant. There are 24 monitoring stations of the tele-dosimetry system, which continuously monitor the dose rate of gamma radiation, activity of aerosols and radioactive iodine in the air, soil, water and food chain (feed, milk, agricultural products). The volume of radioactive substances contained in liquid and gaseous discharges is considerably lower than the limits set out by authorities.

Občianska informačná komisia BohuniceObčianska informačná komisia Bohunice (OIK) je vytvorená za účelom zlepšenia informovanosti verejnosti regiónu tvoreného oblasťou ohrozenia jadrovými zariadeniami v lokalite Jaslovské Bohunice.

Pôsobia tu Slovenské elektrárne, a.s.  (SE), Jadrová a vyraďovacia spoločnosť, a.s. (JAVYS), Jadrová energetická spoločnosť Slovenska, a.s. (JESS).

Verejnosť je o všetkých aspektoch prevádzkovania jadrových zariadení a vplyve na životné prostredie informovaná prostredníctvom delegovaných zástupcov SE, JAVYS, JESS a R–ZMOS Jaslovské Bohunice (Regionálne Združenie miest a obcí Slovenska – región Jaslovské Bohunice).