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this post was submitted on 14 Aug 2024
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Right? I'm not an anti-nuclear person in general (although I think it's becoming mores superfluous as other methods become more efficient), but "thousands of people died and then they built a new city, so don't worry" is so fucking stupid.
Yeah, nuclear power plants are expensive and slow to construct. 20 years ago, hell, 10 years ago, I would've said "Yes, building new plants or making major expansions is still a good idea." Now? Renewables are advancing so fast that it's probably economically unwise to make major investments in nuclear power.
Nuclear energy has insane energy density in terms of MJ/kg (something like 3.9 x 10^6 ) versus chemical fuels (4.5 x 10^1), but it's grossly inefficient because most of the output is waste heat and "hot" isotopes-- the last things we need. I don't have hard numbers on hand but I wouldn't say nuclear is more than a few tens of percent efficiency. Then there's the capital costs to build, maintain and operate plants PLUS costs to source, refine, transport, and store the fuel, and then transport and discard (contain) waste product. Not worth it at scale.
Versus Solar, Wind and Tidal which are far less energy dense per unit mass of working fluid¹, but enjoy up to 80% efficiency, and are relatively easy to scale.
Nuclear still makes sense, I think, in interior areas like the American Midwest where wind and solar are fickle, and transportation (transmission) costs for tidal would be unsustainable.
¹ Not a fair comparison because solar efficiency is quantized on intensity x area / time, while wind and tidal would quantized on flux density, or (mass / area) x velocity (over time?).
I think it would make the most sense at high latitudes. Where they don't get enough sun for solar and maintenance on iced-up turbine blades would be a pain in the ass.