One in Wisconsin, because it can't produce power that anyone wants to pay for. Another in Florida, because owners screwed up an upgrade, broke the containment, and cracked it again trying to fix it. Now they are $2,000,000,000 behind. They now have to scrap it 20 years early.
We started building many nuclear power plant sin the 1960's. At that time engineers and designers said that the reactors were built to last about 40 years. There are about 100 US nuclear plants now at or near that 40 year age limit. Many have been give license extensions, although engineers and especially neighbors have shown a lot of concern about the increasing signs of reactor aging and the potential dangers of a malfunction. These plants will need to be replaced with the newer, safer, cheaper, and smaller nuclear plant designs that are possible now. China, alone, has at least 20 new nuclear plants under construction now with plans for at least twice that many more.
It's a myth that there are any 'safer and more efficient' nuclear designs. There have been many designs floated, but none of them have panned out. It would take until 2050 to prefect any of the designs and test sufficiently.
So long as the American property owner is uninsured against nuclear plant disaster, power companies will continue to push the risk to home owners. If Wall Street had to finance nuke power, it would end tomorrow.