At least one injector condenser (20) is used to supply secondary feedwater
to the steam generator (1) during a phase in the course of which the temperature
and the pressure of the coolant of the reactor coolant system (2) of the
nuclear reactor are varied between hot shutdown conditions of the nuclear reactor
and conditions making it possible to bring into service the residual heat cooling
system (RRA). The injector condenser (20) is fed with steam withdrawn from
an upper part of the steam generator (1), at a first inlet, and with feedwater
from a storage tank (10), at a second inlet. High-temperature pressurized
feedwater is supplied to the steam generator (1) by means of one injector
condenser (20) outlet. The steam generator (1) is fed without using
an additional pump for withdrawing feedwater from the storage tank (10)
and for injecting feedwater into the secondary part (3) of the steam generator (1).
