Actual real reasons like possibility of continuous dark cold windless weeks in the winter and then the more common/real one. Politics.
Also if someone wants to build nuclear why would you not let them? More production in general is better as long as the public money put into it is the same per kWh produced as wind/solar/whatever why would I care?
Denmark, 2026: system-level LCOE including storage, flexibility and system integration; renewables substantially cheaper than nuclear.
https://www.sciencedirect.com/science/article/pii/S036054422...
Finland, 2025: nuclear scenarios 71–84% higher system cost; unrestricted least-cost optimization builds zero new nuclear.
https://www.sciencedirect.com/science/article/pii/S036054422...
Australia, CSIRO + AEMO GenCost 2025–26: whole-system modelling including transmission, storage and firming; renewables + storage remain the lowest-cost net-zero pathway.
https://www.csiro.au/en/research/technology-space/energy/Ele...
What are these grid operators and researchers missing that you know?
Also their listed cost of nuclear power is a lot higher then actual real cost (TVO lists these publicly but every study still uses numbers that are much higher)
Edit: and again if someone wants to build (and pay for it) let them. Electricity production here (Finland) isn’t some single system where someone has control over all the investment but a free market where everyone is free to compete. If you think that you can compete with your solution (and can convince the investors/banks) why should we be saying no you can’t? In electricity production where there is actual cost for CO2 this actually works.
For the record I am against the government giving some guaranteed tariff price (or any other direct subsidy like that) to any production method. If new nuclear can’t be built without such subsidies then we should not build it.