3 De-aerator system
The de-aerator and associated plant accept feed from the LP feed train to heat and de-aerate the water and then supply it as feedwater to the boiler feed pumps.
The de-aerator storage tank also acts as a receiving vessel for the HP drains and boiler feed pump leak-offs. The term de-aerator in the context of this section is taken to include the de-aerator head, the storage tank and associate plant. The feed pump suction pipework is also included in this section, as its configuration has an important effect on de-aerator behaviour under transient conditions.