Regulations.
Lack of investments.
Lack of scale.
Scare mongering.
Lack of research.
After 60' not much money went into research for nuclear power. While solar power, betteries etc. become much cheaper due to a huge stream of money flowing into research for that area. If comparable sums would be used for research into nuclear power, probably the power plants would be cheaper and nuclear energy would be cheaper to produce.
The article covers this; in excruciating detail. The regulations add to the cost but even without that it would be costly. And a lot of the regulations have come from actual real life incidents. It's not like nuclear operators would be able to cut lots of corners on safety without regulations.
Solar and wind definitely benefited from lots of government support. Just like nuclear did back in the day. Unlike nuclear, wind and solar are now commercially viable even without subsidies.
Regulations. Lack of investments. Lack of scale. Scare mongering. Lack of research.
After 60' not much money went into research for nuclear power. While solar power, betteries etc. become much cheaper due to a huge stream of money flowing into research for that area. If comparable sums would be used for research into nuclear power, probably the power plants would be cheaper and nuclear energy would be cheaper to produce.