>>13797791nuclear powerplants aren't that efficient. The temperature of pressurized water reactors can't get higher than 647 K, whereas the temperatures inside a gas turbine can get to 2344 K. So the efficiency of PWR is typically 33%, whereas combined cycle powerplants can regularly achieve efficiencies more than 50%. Hydroelectric turbines can attain efficiencies in the 90% range. So no, nuclear is not the most efficient energy source. This chart shoudn't use the term efficiency, it should use energy density instead. And efficiency doesn't matter too much, what matters is that it doesn't emit CO2 and can produce power on demand.
