The main problem with nuclear in the west is mismanagement and loss of skills amongst construction and engineering staff. Many countries haven't built a nuclear powerplant in decades, and are having difficult now.

China is doing much better, and so is France and even Russia is doing ok, as they have a larger and more experienced workforce regularly building reactors.

I live in the UK and for the past decade every major construction project I can remember was massively delayed and over budget. Currently its HS2 and crossrail. So the faults don't appear to be specific to nuclear in industry.