this post was submitted on 01 Aug 2023
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Oh, neat. My state did something not completely stupid. I've got some reservations about nuke power as opposed to renewable, but this is definitely better than continuing fossil fuels.
Fission and fusion reactors are really more like in-between renewable and non-renewable. Sure, it relies on materials that are finite, but there is way, way more of that material available in comparison to how much we need.
Making this distinction is necessary to un-spook people who have gone along with the panic induced by bad media and lazy engineering of the past.
Fusion and fission are quite different. A practical fusion reactor does not exist. It's outside our technological capability right now. Current fusion reactors are only experimental and can not maintain a reaction more than a small fraction of a second. The problem is plasma containment. If that can be solved, it would be possible to build a practical fusion reactor.
The fuel for a working fusion reactor would likely be deuterium/tritium which is in effect unlimited since it can be extracted from seawater. Also the amount of fuel required is small because of the enormous amounts of energy produced in converting mass to energy. Fusion converts about 1% of mass to energy. Output would be that converted mass times the speed of light squared which is a very, very large number, in the neighborhood of consumed fuel mass times 10^15^.
Fusion is far less toxic to to the environment. With deuterium/tritium fusion the waste product is helium. All of the particle radiation comes from neutrons which only require shielding. Once the kinetic energy of the particles is absorbed, it's gone. There's no fissile waste that lingers for some half life.
Here's something more interesting. A matter-antimatter reactor converts 100% of mass to energy so it's a hundred times more efficient than fusion. In modern times antimatter has been produced at quantum levels in large accelerators such as the Hadrian collider. So it does in fact exist and can be produced.
However a matter-antimatter reactor has some serious technical problems. For one it's currently impossible to create antimatter in any practical quantity. Second if antimatter comes in contact with matter, instant boom. Like a sugar cube size of the stuff could level a large city. So containment would be an insurmountable problem.
The interesting part is when you see an antimatter reactor in shows like Star Trek, it's based on real science. Interestingly in 1968 when they wrote the original Star Trek, nobody knew antimatter was a physically real thing. That's a case of sci-fi predicting science.
But antimatter needs energy to create, probably more energy than it can produce. Unless you can find some source of it in the environment. Fusion is much more likely to be feasible.
Antimatter might make a good compact way to store energy for a starship, if it was created in a large fixed facility with access to huge power sources. But it's not a way to generate energy by itself.
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Your info is a little out of date - some fusion experiments have been able to maintain fusion for almost a minute. However, your point still stands. We are decades away at a minimum untill a viable fusion reactor.
My guess is that fusion will be too expensive for commercial use unless they can get a super compact stellarator design to produce huge amounts of energy, and make them cheap to build (HA!).
Or we will see them in spaceships. :P
LWR fuel is incredibly limited without a massive fleet of breeders (and no breeder has ever run a full fuel cycle, nor has second generation MOX ever been used. First generation MOX is also incredibly polluting and expensive to produce).
The industry is already on to tapping uranium ore sources that are less energy dense than coal, and this is to provide a few % of world energy for a handful of decades.
We don’t even know if fusion will ever be functionally able to produce more energy than it consumes, and on top of that it will need to be less expensive than natural gas or solar in order to compete. Which it will never do. Do you have any idea how much ITER has cost?
$22 billion, or $16 billion “over budget.” And this is a test reactor that will never produce commercial power. They still have 2 years of construction left so… it could hit $30 billion. At least at Vogtle they are getting two reactors.
We can still categorize a concept, even if the technology doesn't exist in a useful state yet.
Too bad the energy companies essentially never dispose of the waste properly, because it's too expensive if they want to give the huge bonuses to their CEOs and buyback thie stock. Even when doing it "properly" it's basically just making it the problem of future generations once the concrete cracks.
And to reprocess the waste and make it actually safe energy would mean no profit at all plus the tech doesn't exist yet to actually build the reactors to reprocess the waste. I mean we understand the theory, but it would take at least a decade to engineer and build a prototype.
Compare that to investing in battery tech which would have far reaching benefits. And combining that with renewables is much more profitable.
To be fair, nuclear waste tends to be disposed of much more properly than coal waste.
There's also orders of magnitudes less.