None have commenced operation, but NRC has approved applications for new nuclear plants.
It's easy to blame regulators, but a big factor is simply cost. For the last 20-30 years, low fossil fuel costs in the US have meant that the huge investment needed to get a nuclear plant from application to operations didn't make sense. Westinghouse Electric went bankrupt in 2017 because of it. Add in that nuclear has been very out of favor with the public, it makes it really hard to get a reactor built.
It's easy to blame regulators, but a big factor is simply cost. For the last 20-30 years, low fossil fuel costs in the US have meant that the huge investment needed to get a nuclear plant from application to operations didn't make sense. Westinghouse Electric went bankrupt in 2017 because of it. Add in that nuclear has been very out of favor with the public, it makes it really hard to get a reactor built.