Isaac Marino Bavaresco wrote:
> In spacecrafts, the cold source is heat-sinks that radiate the energy to
the space, in "normal" nuclear power plants, the cold source is the
water in a river or sea. <

The power plant that supplies electricity to the city where I live, is 
located in the middle of a desert:

http://en.wikipedia.org/wiki/Palo_Verde_Nuclear_Generating_Station

"Palo Verde is the only nuclear generating facility in the world that is not 
located adjacent to a large body of water. Instead, it uses treated sewage 
from several nearby municipalities to meet its cooling water needs."

Vitaliy 

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