alt Hacker NewsI think it’s quite conceivable that nuclear would be cheaper for a 100% carbon free grid.
But I don’t understand how the combination of nuclear, wind and solar would be low cost. Wouldn’t you effectively have to build out enough nuclear to cover still cloudy days at which point your wind and solar is not very useful? That sounds expensive.
I suspect we won’t end up building much nuclear because we will already have built out so much wind and solar. Nuclear is a poor fit for filling gaps in generation by intermittent renewables because fuel costs are negligible so it costs the same whether you run at 50% or 100% of rated output.
To eliminate carbon emissions entirely we will need some green hydrogen for turning into aviation fuel and as chemical feedstocks. Perhaps the gas backup will eventually burn that.
Green hydrogen is prohibitively expensive and are still way more expensive than using fossil fuels to create hydrogen (called black hydrogen). Burning green hydrogen for electricity when we have yet to make green steel economical viable is not a good idea. Nuclear is still a magnitude cheaper than that.
Green hydrogen has to first prove itself that it can become economical viable. One of the biggest test trials for that is the Swedish initiative, and that one is mostly paid through subsidies and grants. Sadly it isn't looking very great even if the government did decide to continue sending more billions into the project.