FLOW DIAGRAM OF THE ARMENIAN NPP UNITS
NPP Unit process flow diagram consists of two circuits.
The primary circuit is radioactive and includes a WWER-440 reactor and
six circulation cooling loops. Each loop comprises one reactor coolant
pump (RCP), steam generator and two main loop isolation valves. A pressurizer
is connected to one of the circulation loops of the primary circuit to
maintain the designed pressure of water acting as a coolant of reactor
and neutron moderator, at the same time.
The secondary circuit is not radioactive. It comprises steam generators,
steamlines, steam turbines, separator – reheaters, feedwater pumps,
deaerators and regenerative heaters.
A steam generator is a common component for primary and secondary circuits.
The heat energy generated in the reactor is transfered in the steam generator
via its heatexchanging tubes from primary circuit to the secondary circuit.
Saturated steam generated in a steam generator is supplied by steamlines
to the turbine driving the generator rotation for generation of electric
Cooling towers are used in turbine condenser cooling system.
technical features of the Armenian NPP Units
of Units: 2
Electric power: 440 MW
Heat power: 1375MW
WWER – 440 reactors are operated in Russia, Ukraine, Finland, Czechia,
Slovakia and Bulgary.
Moderator and coolant: water
Fuel: UO2 enriched in U235
Number of turbine generators per Unit: 2
Capacity of turbine generator: 220MW
Number of circulation loops: 6
(Reactor coolant pumps, steam generators)