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Nuclear being absurdly expensive feels a lot like rocket launches being expensive. We went from the Saturn V with a ballpark cost of 8,800 $/kg adjusted for inf
by MertsA 5y ago
Nuclear being absurdly expensive feels a lot like rocket launches being expensive. We went from the Saturn V with a ballpark cost of 8,800 $/kg adjusted for inflation to the shuttle costing anywhere from 54,500 to 18,000 $/kg and if the SLS ever launches before it's inevitably canceled for being obsolete you could maybe get 14,300 $/kg and Delta, Atlas, Ariane, etc aren't dramatically cheaper either. It wasn't until SpaceX managed to get reusability working in a feasible way that cost to orbit dramatically fell and now you can use Falcon Heavy to get large quantities of mass to orbit for 1,410 $/kg. That lower price enables a breakthrough on the costs of satellites as well with SpaceX launching mass produced StarLink satellites that don't need the exponentially more expensive reliability, longevity, and much higher energy orbits of previous satellite communications constellations.
If nuclear energy has a similar breakthrough that could be revolutionary. LFTR could make a similar change in the economics of nuclear power so long as they can make the online chemical reprocessing work reliably. If you have a reactor running at higher temperatures and low pressure you no longer need such a massively heavy, thick, obscenely expensive reactor vessel and an even more massive and expensive containment building built to withstand a continuous overpressure on par with what would be experienced close to a nuclear bomb exploding. Fun fact, the wall thickness of a minuteman missile silo is supposedly 4ft thick reinforced concrete. Some nuclear reactors use 5ft thick reinforced concrete for their containment structures. Getting rid of all that expense for a GW scale reactor could be a game changer especially if an inherently safe design allows for graceful failure of many subsystems where any component breaking isn't substantially more severe than it would be for that to happen to a coal power plant.
Renewables may be cheaper than nuclear power, but renewables plus massively expanded energy storage plus nuclear power coming down in price would be an easy win for nuclear power.