Just to complete that thought, the cooling towers cool water that
circulates through heat exchangers that recondense the turbine
exhaust back into feedwater for the heat exchangers that transfer
energy from the reactor's cooling circuit.


  |---------------|   |------turbine, etc---|  |---------|
  |                >   >                    >   >        .
reactor            <   <                    <   >        .
  |                >   >                    >   >        C. T.
  |---------------|    |--------------------|  |----------

The reactor has a closed loop circuit to prevent radioactive
contamination of the the turbine feedwater.

The cooling tower is a separate circuit to avoide contamination of
the turbine feedwater with atmospheric contamininats, etc.
Purifying boiler feedwater is important business at both fossil
fired and nuclear generation facilities.

