Is there a good source for the economics surrounding large scale nuclear fission reactors? I'm interested to see what part is the gearing cost vs building at l

Is there a good source for the economics surrounding large scale nuclear fission reactors? I'm interested to see what part is the gearing cost vs building at larger scale. A large part of the cost, some nuclear engineers told me, is that there is no more large scale industry in building large nuclear reactors. Investments have dried up essentially, so next generation plants pay a steep gearing cost. I'm from a country with about half nuclear mix. The managing company has made around 1-2B EUR in profits last year, and that is with a special 1/5 tax agreement for keeping the nuclear reactors open for longer. So those reactors built in the 70-80s appear to have been massively profitable over their lifetimes. It remains to be seen how much the decommissioning factors in.