Javys, a.s.

Technical Parameters

Number of reactor units 2
Reactor electric output 440 MW
Reactor type WWER 440 / V 230
Reactor thermal output 1,375 MWt
Coolant and Moderator demineralized water
   
Reactor  
Reactor pressure vessel  
Sizes - diameter 3,840 mm
- height 11,800 mm
- weight 215 t
Material carbon low-alloy steel
   
Reactor active zone  
- diameter 2,880 mm
- height 2,500 mm
Number of fuel assemblies 276
- shape hexagonal
- diameter 144 mm
- height 3,200 mm
Number of shielding assemblies 36
Number of fuel rods in one assembly 126
- diameter 9.1 mm
- height 2,500 mm
Shell material zircon and niobium alloy
Number of regulator assemblies 37
- shape hexagonal
- diameter 144 mm
Fuel capacity 42 t
Input cooling water temperature 265 ± 2 °C
Output water temperature 294 ± 2 °C
Water pressure 12.26 MPa
   
Steam generator  
Number of steam generators per unit 6
Sizes  
- length 11,800 mm
- diameter 3,210 mm
- weight 145 t
Steam output 452 t/h
Steam pressure 4.6 MPa
Steam temperature 256 °C
Feeding water temperature 158–223 °C
Number of heat exchange pipes 5,536
Heat exchange surface 2,510 m2
   
Main circulation pump  
Number of MCPs per unit 6
Electric motor input 2 MW
Voltage 6 kV
Revolutions 1,500 rpm
Coolant flow 6,500–7,100 m3/h
   
Turbo generator  
Number of TGs per unit 2
Nominal output 220 MW
Revolutions 3,000 rpm
Steam temperature (HP part) 256 °C
Steam pressure (HP part) 4.3 MPa
Steam temperature (LP part) 216.5 °C
Steam pressure (LP part) 0.363 MPa
Output voltage 15.75 kV
Cooling water / hydrogen
   
Condenser  
Number of condenser bodies 2
Design two-part, double chamber
Amount of cooling water 35,000 m3/h
Max. cooling water temperature 33 °C
Number of heat exchange pipes 29,480
Heat exchange surface 16,300 m2
Condensers cooling method circulation
   
Cooling towers  
Number of cooling towers 4
Type of tower natural draft
- height 120 m
- bottom diameter 84.4 m
- upper diameter 53 m
detail
detail