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There is a super critical co2 turbine being developed. Based on a gas turbine but used co2 instead the atmosphere and heated through heat exchanger instead of combustion. Supposed to be a lot smaller physically then a steam turbine. Apparently China have one running. Developer are looking at high temp NPP to run them. Still would require a "condenser" of some sort.

Back when folks were worried about pollution and water shortages, US coal and nuclear power companies toyed with air cooling instead of water cooling. The use of air reduced the power station outputs. Especially during heat waves. The idea was largely ditched due to that loss of efficiency. Same here in Australia. Although, more recently, Kogan Creek thermal power station uses air cooling. Water is not plentiful out west.

Clutching at straws? The issue is with Nuclear,in Europe needing water to cool. So does Coal but not as much.The Failure of Fukashima set japan back years in Lost Production and model updates. Nev.