that “cost” in nuclear has more to do with regulations rather than technology.
How long do you think it takes to "recycle" a nuclear power plant after it finishes operation? Decommissioning an old nuclear power plant can take more than 100 years and costs billions.
Decommissioning and clean-up of the UK's fleet of 17 retired Magnox reactors, built between the 1950s and 1970s, is estimated to cost in excess of £100 billion, and will still be ongoing well into the 22nd century:
https://www.world-nuclear-news.org/WR-UK-nuclear-clean-up-co...
Is it really fair for us to keep offloading these costs and problems onto future generations?
Have a look at France - they get over 70% of their electricity from nuclear just fine. And it is much cleaner and cheaper than in Germany which opts for Russian gas instead.
That either means a gargantuan cost to build new plants (making germany's recent renewables building spree look cheap) or trying to make a plant that was designed for 80 years last 100 with all of the exciting safety concerns which go with it.
Even France has cooled on nuclear due to the high costs involved. As old reactors are decommissioned, they plan to replace them mainly with renewables:
https://www.power-technology.com/comment/renewable-energy-to...