I think most commercial nuclear reactors require craptons of cooling water because they aren&#x27;t that efficient in fact.  (When you use water to regulate fission, the temperature can&#x27;t get much higher than ~100C.)<p>So, putting them in the middle of a desert might be problematic.<p>I wonder if there&#x27;s any current commercial ones that are more efficient?  Theoretically we can greatly improve efficiency by using high-temperature designs, but good luck building an <i>unproven</i> new design of reactor these days...