Data on Loviisa NPP
Electric power, net | 490 MWe |
Annual electricity production | ~3,8 TWh |
Thermal power | 1500 MWth |
Total efficiency factor | 33 % |
Reactor core |
Height | 2.4 m |
Diameter | 2.7 m |
Fuel rod bundles | 313 items |
Steel elements | 36 items |
Fuel rods in an assembly | 126 items |
Amount of fuel | 37400 kgU |
Fuel rods in an assembly | 3.6 % |
Amount of fuel reloaded annually | about 1/3 of amount of fuel |
Rated length of the refuelling interval | 7 800 h |
Control rods (of boron steel) | 37 items |
Discharge burn-up max. | 35 MWd/kgU |
Cooling water of the reactor (six circuits)
(boron-rich distilled water) |
Flow | 6 x 7 100 t/h |
Feedwater temperature | 264°C |
Temperature of outgoing feedwater | 299°C |
Pressure | 123 bar |
Reactor pressure vessel VVER-440
Carbon steel with CrMoV as alloying element equipped with a stainless steel lining |
Height | 13.,9 m |
Diameter | 4.1 m |
Wall thickness in the cylinder | 148 mm |
Containment building
Free-standing steel shell equipped with an ice condeser system an ouret concrete wall |
Height | 64 m |
Diameter of the steel shell | 44 m |
Ice condenser system | about 900 000 kg of ice ( -9°C) |
Turbines (2) |
Rated power | 258 MW |
Rated speed | 3 000 rpm |
Steam flow | 400 kg/s |
Steam pressure | 46 bar |
Steam temperature | 255°C |
Generators (2)
Rated values of the generators: |
Nominal rating | 278 MVA |
Rated voltage | 15.75 kV |
Rated current | 10195 A |
Power factor | 0.9 |
Effiency | 98,7 % |
MW = megawatt = 1000 kW
TWh = terawatt hour= 106 MWh
kgU = kilogram of uranium
MWd = "megawatt day"
t/h = 1000 kg/hour
1 bar = 105 Pa
rpm = revolutions per minute
MVA = megavolt ampere
