You should watch this video (and several others) of this professor, David Ruzic from Uni of Illinois

This video he talks about the economics of nuclear plant.

https://www.youtube.com/watch?v=cbeJIwF1pVY

This video, he talks about modular micro-nuclear reactor

https://www.youtube.com/watch?v=7gtog_gOaGQ

His videos are great. Worth your time.