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The water fluid circuit includes the condenser discharge that is pumped up to
the drum through a series of pumps and feedwater heaters. The path consists of:
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Two condensate pumps
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Low-pressure feedwater heaters
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2 Boiler feed pumps
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High-pressure feedwater heaters
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Economizer
The boiler circulating pumps take water from the steam drum into the front and
rear waterwall inlet drums. From the waterwall inlet drums the water feeds the
furnace wall tubes. The water rising in the furnace tubes absorbs heat and is
then discharged into the steam drum. The boiler water mixes in the steam drum
with the water supplied from the economizer and flows through the downcomers
into the boiler circulating pump. Saturated dry steam leaves the steam drum and
passes through superheaters and then through to the high-pressure turbine.
Steam is then passed to the re-heaters at reduced pressure and then through the
IP turbine and then on to two low-pressure turbine stages.
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