Nuclear reactor safety is improving. Reactor designs are evolving from Generation 3 to Generation 4 designs. Generation 3 and Generation 4 reactors are a magnitude safer than previous designs. With Generation 3 we began moving toward reactor complexes that are unable to meltdown. No more 3 Mile Island or Chernobyl.
Generation 4 introduces waste recycling and proliferation resistant features.
While all of this is good news, the refresh cycle on reactors is slow and there is already a significant installed base nuclear power around the world