this post was submitted on 12 Jul 2025
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Initially, world was very nuclear-positive. Engineers envisioned nuclear power being the holy grail of energy technology and a foundation for our future. Extreme energy density and low price-per-watt of nuclear fuel promised an energy revolution - and for a while, it actually began.
Added to expand: add to this the boost of military. The Cold War required many countries to build up nuclear arsenal, and to make weapon-grade plutonium, you need to conduct uranium cycle - one that conveniently produces a lot of energy and can be used to generate power.
Then, Idaho, Chernobyl and much later Fukushima happened, slowly turning the world against nuclear as a dangerous energy production option. Association with nuclear weapons and Cold War didn't help, either.
In the meanwhile, renewables like solar and wind, which were initially prohibitively expensive, got more traction and investment, and as a result of new developments and economies of scale, they eventually managed to become cheaper than nuclear in most areas of the world, rendering nuclear power financially inefficient and thus largely obsolete.
This was always propaganda to butter over the fact that the investments into nuclear power only made sense as a basis for a nuclear weapons program. Without that (or the ambition for one) nuclear power has always been an economic black hole and with renewables becoming so cheap it is even harder to argue for it.
Up until quite recently, nuclear has been decently economical as it is - but indeed, a lot of nuclear investments of the previous century were made with obtaining weapon-grade plutonium in mind. It's one part of why countries went with uranium cycle to begin with.
Modern research into thorium-based reactors that could be cheaper, safer and not produce nuclear weapon material is too little too late. Renewables already took over the game.
Anyway, I added this to the original response, as I think it is a vital part I forgot to mention.