Comment by gus_massa

> You could probably just boil off your water, instead of returning any?

You get a lot of salt residue that you have to dispose. The usual nuclear plant tower [1] evaporates most of the water to dump heat, but returns a small part of it to avoid collecting salt. But it has to be not to hot nor too salty to avoid killing the fishes.

[1] https://www.google.com/search?q=nuclear+power+plant+cooling+... [How to I link to the images pages?!?! Google changed the format of the URL and I can't find the correct &something=xyz to make a short link to the images :( .]