Should be the first of many new generation plants. Fossil fuel emissions are an urgent problem and renewables aren't going to take up the slack by themselves.
There are no new nuclear plants even seriously in the planning stage in the US and it's unthinkable that other than Vogtle reactors 3 and 4, any new nuclear power will come online before 2030. Even with a dramatically increased nuclear program it would probably be 2040 at the earliest before we could see a significant impact on the total US generation mix. All the while renewable energy is deploying the equivalent of 5 large nuclear plants per year, doing it cheaper and on time.
We should build more nuclear plants for the long run, but they are completely incapable of addressing anything "urgently". That needed to happen a decade or more ago. In fact it did happen with the Summer and Vogtle projects but they turned into catastrophes. Now, instead of having a dozen or more plants under construction we have no new projects. The nuclear industry had its chance and failed. It was not due to lack of government support, NIMBY, or environmental interference, but due to being unable to deliver on promises.
Of course mileage may vary in other countries, but mostly everywhere but China and India are mostly moving away from nuclear and would take years to reverse those trends.