Conventional nuke plants don't consume a ton of water for cooling. I believe (definitely not an expert) that any water used for cooling is kept in a closed loop system. The vast majority of the water consumed by a nuclear plant (or any thermal power plant) is used by being converted to steam, which is then used to spin a turbine (though some percentage of that water can also be reused by condensing it in cooling towers, as described in the article).

The system described in the article punts the "how do we use the heat this system outputs" to some other facility/plant. It could use the heat directly in a variety of industrial processes, or it could be used to boil water for a steam turbine.