On: Germany is closing half of its reactors before the end of the year

[monopoledance]

Or when their nuclear power plants boil their rivers...

[nitrogen → monopoledance]

Are there closed loop reactor designs that don't need to dump heat into a body of water?

[hollerith → nitrogen]

Thermodynamics says that it needs to dump heat somewhere, but maybe they can dump it into the atmosphere instead using hyperboloid cooling towers.

Those are huge though (at least "natural draft" ones are) and usually made of concrete, and making the concrete currently requires lots of carbon emissions.