It is only because on the insistence of Admiral Hyman G. Rickover than Pressurized water reactors (PWRs) constitute a majority of all western nuclear power plants. He rejected "crazy thermodynamic cycles that everyone else wants to build". So we got stuck with PWR inherent flaws. Check "The Rickover Effect: How One Man Made a Difference" (http://bit.ly/2FiJQ1u)