There are ultimately some problems with widespread investment in nuclear. In the 50's and 60's when nuclear became big it was seen as the cure to our power problem. However though it does not produce carbon emissions it does produce radiactive waste. Sure that waste can be reprocessed a lot to make it really small but ultimately that infrastructure is not in place to handle an expansion. And the infrastructure we do have in place is old and falling apart. Also advancements in solar and wind make major investments in nuclear improbable.
However that doesn't mean nuclear will go away. One nuclear plant can power 2 million homes. The same power production would require hundreds of wind turbines or thousands of solar panels covering hundreds of square miles of land, and both of those aren't reliable forms of power generation. Wind dies down or increases beyond operating limits and solar panels dont work at night or in bad weather. They are merely supplementary. That kind of land coverage is not realistic.
If you want to go carbon free but still meet power production requirements then nuclear is really the only option. But until the waste problem is solved there will probably never be any form of nuclear expansion. Just a continuation of infrastructure already in place.
