5.1 gigawatts of American reactors are expected to retire this year: https://www.eia.gov/todayinenergy/detail.php?id=46436
It's a shame that the US is retiring working reactors while still burning fossil fuels for electricity. Reactors are far safer and cleaner than fossil electric generation. It's mostly the low price of natural gas that is driving these early retirements. Low gas prices have also retired a lot of coal usage -- which is good! -- but we'd make more climate progress if those low prices didn't also threaten nuclear generation.
Some states like New York already provided incentives to keep reactors running for climate reasons:
https://www.eia.gov/todayinenergy/detail.php?id=41534
Federal policy could be more comprehensive.