“Once completed, it will deliver 3.2 GWe”
For those who don’t want to do the math, that comes out to about 40 to 50 square miles of solar panels (75 million panels), to provide the same average power as the nuke.
That last stage is there mostly to help cool the steam before hitting the condenser. Ekes out a smidgeon more power and saves on the cost of a larger heat exchanger. $$$