Experts Urge US To Continue Support For Nuclear Fusion Research (scientificamerican.com) 234
An anonymous reader quotes a report from Scientific American: A panel of 19 scientists drawn from the National Academies of Sciences, Engineering and Medicine recommended yesterday that the Department of Energy should continue an international experiment on nuclear fusion energy and then develop its own plan for a "compact power plant." A panel of 19 scientists drawn from the National Academies of Sciences, Engineering and Medicine recommended yesterday that the Department of Energy should continue an international experiment on nuclear fusion energy and then develop its own plan for a "compact power plant."
But as the National Academies' report noted, major challenges must be overcome to reach these goals, beginning with how to contain and control a burning "plasma" of extremely hot gas, ranging from 100 million to 200 million degrees Celsius, that can produce more heat than it consumes. The report calls the resulting plasma "a miniature sun confined inside a vessel." The world's biggest experiment intended to create and draw energy from burning plasma is under construction at Cadarache, France. It's called the International Thermonuclear Experimental Reactor (ITER) project, and its centerpiece is a large, doughnut-shaped, Russian-inspired reactor called a tokamak. Several member nations have already developed their own national programs, and the assembled National Academies experts concluded that the United States should eventually follow, once the ITER experiment shows there are ways to contain and manipulate a sustained fusion reaction. "It is the next critical step in the development of fusion energy," says the report.
But as the National Academies' report noted, major challenges must be overcome to reach these goals, beginning with how to contain and control a burning "plasma" of extremely hot gas, ranging from 100 million to 200 million degrees Celsius, that can produce more heat than it consumes. The report calls the resulting plasma "a miniature sun confined inside a vessel." The world's biggest experiment intended to create and draw energy from burning plasma is under construction at Cadarache, France. It's called the International Thermonuclear Experimental Reactor (ITER) project, and its centerpiece is a large, doughnut-shaped, Russian-inspired reactor called a tokamak. Several member nations have already developed their own national programs, and the assembled National Academies experts concluded that the United States should eventually follow, once the ITER experiment shows there are ways to contain and manipulate a sustained fusion reaction. "It is the next critical step in the development of fusion energy," says the report.
Another great reason not to worry too much (Score:3)
The thing about reports that try and forecast how much CO2 we are omitting, is all of them are based on current technology.
They don't take into account technological breakthroughs, especially on the order of magnitude of getting a working fusion reactor...
Overnight the entire world's energy makeup would change, as such reactors became widespread.
No we don't know this exact thing will pan out, but when people are talking about problems even 80 years from now - that is a LONG time for lots of amazing technology to come along. It's certainly been the case that even just over the last 20 years a lot of things are around now that were not dreamed of, nor thought possible back then.
Re:Another great reason not to worry too much (Score:5, Insightful)
It sounds like you're saying we don't need to worry about our current CO2 outputs because technology will just come along that solves the problem effortlessly.
If only. Managing CO2 atmospheric levels is a difficult problem whose solution spans geography, cultures, economies, political systems ... it's not just about technology. Leaving it all up to The Invisible Hand of technological progress is wishful thinking that we just can't afford. We need to make plans and set goals.
Scientists and engineers have been trying to get a fusion reactor to work for decades. Don't get me wrong, I'd love to see a working fusion reactor in our lifetimes. But it's a mistake to depend on a technology that is, however worthy, still not viable yet. Wind, solar, tide, geothermal -- and yes, nuclear fission -- are all proven technologies that are not perfect but are viable now.
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The problem is that to "solve" the "problem" in the manner you describe would require a global governance
No it doesn't. It just requires that scientists share their findings and work together. They already do this, especially on large projects based around pure science.
It is unfortunate it is taking so long to develop workable fusion power, but it is a rather complex problem to solve. I do wish more resources were put into it- it is one of the best-hope projects being done to "change the world." Unlimit
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This is exactly the most dangerous kind of thinking. There is no reason to believe that a fusion power plant is any less likely than any of the other pie-in-the-sky schemes to control global CO2. As this article infers, fusion research is paid for with surplus tax money from various world governments (ignoring Lockheed and other private programs). That kind of money comes from increased economic activity which is directly correlated with the amount of fossil fuels that are burned. Restricting the free flow
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There is no reason to believe that a fusion power plant is any less likely than any of the other pie-in-the-sky schemes to control global CO2.
While that's true, that only applies to the other pie-in-the-sky schemes, and not to the credible ones. Therefore, you really said absolutely nothing useful there.
It's not effortless at all. Just indirect. (Score:2)
It sounds like you're saying we don't need to worry about our current CO2 outputs because technology will just come along that solves the problem effortlessly.
I find it amusing you think developing a fission reactor is "effortless"
Or developing much more efficient solar cells. Or any one of the countless other things that WILL improve over the next 20-30 years in ways you cannot image.
It's not that these things are effortless - it's that over the span of all progress, they are INEVITABLE. The massive swit
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Lets not forget bio fuels. Our gasoline, diesel and jet fuel does not need to come from petroleum. It can come from biological processes so that these fuels become carbon neutral.
No, we need to forget about bio-fuels.
I saw the math on how much land, fresh water, and other resources needed for bio-fuels, and how much we actually get back from it, and bio-fuels are worthless. This cannot be fixed with genetically engineered algae, or improved farming techniques. The problem is that the highly diffuse sunlight is being converted to fuel, and no matter how you do it, or how efficiently it is done, there is a minimum amount of land needed to collect a given amount of energy. Bio-fuels
Re: CO2 outputs (Score:3)
My professional experience working with modeling software
Your professional experience working with *climate* modeling software? Or is it just a case of engineering woo on your part?
Re:Another great reason not to worry too much (Score:4, Interesting)
You hold out that some tech 50 years from now will save us from global warming. We are already at 1 C above pre-industrial-revolution global average temperature, and we have already locked in probably 1.5 C above pre-industrial-revolution global average temperature, and on our current trajectory we're heading for 4 to 5 C above, which is a different kind of planet than humanity has ever known.
Whatever we do right now will start bending the curve in 50 to 100 years. That's how frickin' big this problem and system is. That's how long it takes to turn this Titanic (climate trends) so we have to start immediately and drastically.
You undoubtedly know all this but your agenda is to keep feeding uncertainty to the ignorant. You are an intergenerational criminal.
Sorry (Score:2)
Coal was supplanted over a century ago. It is still used.
Safe forms of fission exist, and have done for 40+ years, but none are in use in the US. The US also bans any form of nuclear reprocessing, resulting in far more dangeroys waste being created.
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resulting in far more dangeroys waste being created. ... depending how you want to judge it.
You got it the wrong way, reprocessing produces more dangerous waste. Or more concentrated waste of the same danger
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Over night? After they get the first reactor working, how many more years will it take to come up with a commercially viable design? How long will it take to build enough of them to replace all the coal and gas fired power plants? You must have long nights where you live.
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In my opinion, that isn't just weasel wording to cover themselves if their predictions turn out to be off or even completely wrong. They are challenges to drive further research, free debates on how to achieve the desired changes and so on. Once we accept that trend X is likely to result in Y, then we can take a g
Endless examples, just look around (Score:3)
What things 20 years ago were never dreamed of or thought possible?
Who thought we would be landing rockets vertically with reusable boosters?
Rovers going for years on end on Mars?
But really you could just google countless examples if you actually cared, like this one [businessinsider.com]
And that's from 2011.... here's a (newer?) one... [theloop.ca]
I can't think of a single one.
If you really can't think of any examples, I feel very very sorry for you. :-(. The world is amazing! Wake up!
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I'm not sure what from those lists you linked were unimaginable 20 years ago. In fact, I'm not sure which ones didn't exist 20 years ago. Except some of the stupid pop-culture things (e.g. crab fishing reality shows).
Opportunity was launched in 15 years ago, so if they planned/built for 5 years before launch, it's over 20. And that's only the record holder. We've been landing rover-like things for 48 years.
There are some things I think could qualify, but not many, and none you brought up.
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Who thought we would be landing rockets vertically with reusable boosters?
Rovers going for years on end on Mars?
20 years ago, our expectations had already come crashing down. The predictions of "Lost in Space", "2001 A Space Odyssey", "The Jetsons" etc etc had all failed to materialise. No moonbase, no flying cars. The lesson is not to cover your ears and rely on magicial technological advancement in the short term.
I wonder if the people of Easter Island were also saying "don't worry"?
Re:Endless examples, just look around (Score:5, Insightful)
I think you deliberately left out "Brave New World" and "1984" because those _have_ come true.
Re: Endless examples, just look around (Score:2)
How the fuck can the predictions of 1984 and brave new world come true TOGETHER?
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Private enterprise, FTW!
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"Never dreamed of" is an incredibly high standard. Science fiction and fantasy exist to reach beyond current limitations, and to inspire ideas to strive for. So many of our outrageous realities were described in fiction, such as private industry surging past government programs to create a space program. That was dreamed of by Robert Heinlein in "The Man Who Sold the Moon". The ideas of a poor desert culture with funding from ownership of a critical resource fomenting religious fanaticism and destructive, g
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Uh, the first vertical landing rocket was demonstrated in 1961.
We're talking about the first successful vertical landing, and from a mission that actually launched a payload.
Re: Endless examples, just look around (Score:2)
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Yes, ya got me there. In that case, a vertical landing was essential to the mission itself, rather than being a recovery. But all though the subsequent Space Shuttle program, rocket recoveries were parachuted into seawater, which has a long history of ruining everything.
never dreamed or thought possible [Re:Endless...] (Score:2)
Uh, the first vertical landing rocket was demonstrated in 1961.
Not one that had boosted a payload into orbit, no.
But, the space shuttle was flying 20 years ago, which boosted payloads into orbit and then flew again. It's only the "vertical landing" part that's new, not the reusable part. And, mostly people weren't envisioning "vertical landings" because it had never seemed like a particularly important thing whether a landing was vertical or not.
...and as for "never dreamed or thought possible"-- no, science fiction landed rockets vertically all the time. It was certai
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And I think people under-estimate the "neat concept" thing as a driver of progress. It may not be possible to build an actual light sabre as depicted in Star Wars, but people are going to try and come up with solutions or work-arounds for the various p
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Wireless internet / wifi
What complete idiot thinks wireless Internet wasn't even imaginable 20 years ago? Wireless networking is almost as old as wired networking. Development for ALOHAnet began in 1968.
Re: I had / did most of those 20 years ago (Score:2)
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Nintendo 64 came out more than 20 years ago, so kids owned 64 bit processors. The surprise is that although we went from 8 bit to 64 bit in 25 years, after another 25 years we're still on 64 bit.
Why is that surprising? That corresponds to 16 exibytes (well 8 if you have signed pointers). There's no machine on the planet which could make use of pointers of that size. And if you happened to have exabytes of storage, well, the latency would be so high that doing a 128 bit integer as 2 64 bit add-with-carry's i
Not just pointers. Went to GPUs with millions of b (Score:2)
> Why is that surprising? That corresponds to 16 exibytes (well 8 if you have signed pointers). There's no machine on the planet which could make use of pointers of that size.
It's not just about pointers. The CPU processes *everything* n-bits at a time, with n-bit precision. I mentioned Nintendo 64. It had 4MB of RDRAM. The 64 bit processor wasn't because it needed large pointers to address a huge amount of memory. :)
Along with all internal operations being n-bits at a time, 16-bit computers normally use
Re: Not just pointers. Went to GPUs with millions (Score:2)
We didn't have AVX 20 years ago (Score:2)
I'm talking about what we expected 20 years ago.
We had gone from 8-bit to 16-bit, then 16-bit to 32-bits, then from 32 to 64-bit. It seemed entirely logical that we'd go from 64 to 128.
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It's not just about pointers. The CPU processes *everything* n-bits at a time, with n-bit precision.
No, it's only about pointers. Desktop CPUs go up to 512 bit wide instructions with the latest AVX. And they're super scalar so they are 256 bits or more wide, but they use that width to do several operations not just one really big one. There's not much utility in 128 bit arithmetic so they don't waste the silicon on it.
Bus bandwidth was a problem and a 128-bit bus seemed likely in the future.
We went flying
Didn't have 2018 AVX in 1998 (Score:2)
> with the latest AVX
Yes, with the latest AVX. AVX didn't exist 20 years ago. I'm talking about what we expected 20 years ago.
We had gone from 8-bit to 16-bit, then 16-bit to 32-bits, then from 32 to 64-bit. It seemed entirely logical that we'd go from 64 to 128. Instead, things went in different directions.
Specifically, IPv6 128 bit in 1998 (Score:2)
As a specific example, in 1998 we saw that CPU "bits" had been doubling every few years, so we didn't expect that 20 years later SQL Server and all the other popular software still wouldn't be able to handle 128-bit values. We thought we could use 128-bit addressing and computers in general would be able to use these 128-bit values after a few years.
If we're had used 64-bit addresses, that would give us 18 quadrillion IP addresses. That's this many:
18,446,744,073,709,551,616
If we knew then what we know now
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Bitcoin is on my list.
Re:Another great reason not to worry too much (Score:5, Funny)
What things 20 years ago were never dreamed of or thought possible? I am interested. I can't think of a single one.
Microsoft ditching Internet Explorer for an open source web browser. Miracles and wonders abound!
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Microsoft ditching Internet Explorer for an open source web browser. Miracles and wonders abound!
Not only is it unexpected, it's also probably for the worse, which is an even more unexpected thing. The web was not good as an IE monoculture and it's moving dangerously close to a chromium monoculture.
About the only reason google isn't now as bad as microsoft is because thye can't seem to keep one idea in their collective head for more than about 5 minutes before deprecating it.
Embrace, ext... oh look, a squi
MIT has a plan for successful fusion energy (Score:2)
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Ignition (Score:3, Interesting)
Nobody has hit ignition yet. This includes the massive complex at Lawrence Livermore. Know how long they have been trying? The "laser bay" set in Tron was filmed in the prototype for the Livermore system. It was built in the 90's, at four times the original cost, and still isn't up to "full power," apparently because they don't know how to get it there.
So, yeah, fusion research in the US has been a total debacle. Hopefully the Europeans can get it to work, but they're already spending the money, so why does the US have to? I think we have the sunken cost fallacy going on with the National Ignition Center.
Re:Ignition (Score:5, Insightful)
Owning that technology seems monumentally valuable.
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Perhaps for a while, but it's all risk/reward, and not in any way a sure thing. We've all heard the claims for decades.
The only way it's "monumentally valuable" is if it not only works, but can be commercialized fast enough to provide an ROI shorter than the remaining patent term, unless you seriously believe that practical fusion power can be kept a trade secret.
Because, no one "owns that technology" even if they figure it out. Society has simply gra
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>"Why would we want the Americans to have it? They'll just find a way to use it for making war on brown people countries, like they always do."
Not only is that totally inaccurate, you fail to realize that one of the most major points of conflict in the world revolves around energy. If you would stop viewing the world through distorted, far-left lenses, you might discover that plentiful, safe, cheap energy would allow all countries a measure of peace, security, and prosperity like nothing else ever could
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You desperately need to study actual history.
He probably wanted to say: Europe combined has only half as many carriers as the US.
Or perhaps he meant: Europe has no subs to sink an US carrier.
Or perhaps he meant: an Exocet is late 1980s technology and wont sink an AEGIS cruiser ...
Perhaps he only was daydreaming and talking in his dreams ...
I could include some links to highlight his follies but that would spoil your fun in googling ... hint: Gotland ... or german subs (yeah, they are in disarray ...)
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Knowing it works is valuable. Owning it once you know the tricks, replicating it is trivial given the scientific base we already have in this country.
Just do what China does (Score:3)
But seriously, there's something to be said for waiting if the existing technology doesn't seem to be up to the task. Japan spent several decades working on and pouring billions of dollars into HDTV, determined to be the first country to have HDTV broadcasts and be in control of all the standards. The U.S. didn't do anything. But Japan built their HDTV standard on analog transmission because that was the only technology capable of doing TV broa
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and will commit its military
Unless the developers of fusion power also built one of those other fusion things.
Re:Ignition (Score:5, Insightful)
Disclaimer: I work in close proximity and collaboration with a DOE-funded fusion research center.
Fusion research has progressed significantly scientifically speaking, we can repeatedly trigger fusion reactions now, the only problem is input v. output (we still put more in than out) but everything else, containment etc. is pretty much figured out. The power differential is a hard problem made only harder by regulations on the fuels necessary. There are various fusion sites in the US that can't even get their hands on the fuels that have been delivering higher yields and if you've never worked with DOE - trying to hire or replace an employee can take 2-3 years, everything else that's done (hey we think we'll get better yields with a $10,000 modification or "let's replace that computer") can take ages as well.
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Thanks for the post! I couldn't find any more recent information than a few years ago when NIF stopped. What fuels are difficult to find? Last I heard it was mostly deuterium, which isn't *that* hard to get.
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What do you mean by "hit ignition"? If you're talking about achieving fusion, it's been done ages ago - in "simple" farnsworth fusor, in tokamaks, in stellarators. The fusion reaction has even been kept on for quite some seconds. They might even have reached break-even (i.e. produced more energy from fusion than has been pumped into the reactor).
Now, what nobody has achieved is to actually make use of the energy. That's not even on the roadmap for ITER, but would be for its successor DEMO.
As for the NIF, ha
Re:Ignition (Score:5, Informative)
Know how long they have been trying?
We haven't been trying. The funding for nuclear fusion has been absolutely laughable. In all of 2018 the united states has spent less on fusion than Total has spent on their garden variety supercomputer to help speed up the processing of depth sounding for searching for oil.
They have spent less money on fusion research in 2018 than a single highway lane expansion project that we have running locally to add a single lane each way for a 10km stretch of road.
We're not trying. We're not even really giving the illusion of trying.
Hopefully the Europeans can get it to work, but they're already spending the money, so why does the US have to?
Because there's more than one aspect of fusion research, there are multiple proposed ways of achieving it, and letting someone else do something in the off chance that they get it working first go is making a losing bet, if they lose we're no better off, if they win, we'll spend a lot of money paying them for their knowledge.
Correction. (Score:2)
s/Experts/Recipients of government grants/
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I was thinking more like . . .
"Food Stamp Recipients Urge US To Continue Support For Food Stamp Program"
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I haven't had a chance to look up who is on this committee, but an office mate of mine was on a previous similar committee that prepared a report recommending fusion research funding a few years ago. The committee included a lot of scientists that would not benefit from fusion funding, including other plasma physics researchers (e.g. astrophysical plasma and plasma processing research) and people from industry. Often such committees specifically avoid people with such conflicts of interest, using direct pa
Trump will kill fusion research, too (Score:4, Insightful)
Meanwhile countries like China will forge ahead and likely master fusion technology ahead of the U.S., and rub our faces in it in front of the rest of the world, making the U.S. look like even a bigger laughingstock than it already has been made to look like in the last 2 years, if you can believe that's even possible. If Trump, somehow, against all odds and against all common sense, manages to get re-elected in 2020, all I can tell you is: better start learning to speak Mandarin and Russian.
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Meanwhile Orange Julius Caesar continually embarasses, discredits, and disgraces himself and the Office of the President, and the entire United States, and will not get re-elected; even your own party has had enough of his shenanigans, so how about YOU get over it, YOU FUCKED UP. BLUE 2020.
Now fuck off and go fix your own shit, you got plenty of it to
Not the plan (Score:2)
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You don't understand the plan. It's not to kill every living thing. The 0.01% of the population that is filthy rich wants to get rid of most of the rest of the population because they are unnecessary for their enjoyment of life, and in fact, cause problems for them. They only need a small number of people to clean, cook, farm, and etc. Once the population is nearly wiped out, we won't need but 0.01% of the cattle, pigs, chickens, etc. that we need now to feed all those useless people.
I don't care how ba
Harrumph, harrumph! (Score:4)
Re:Harrumph, harrumph! (Score:2)
Science is a stupid. I is clevuh. Harrumph! Harrumph!
The biggest challenge (Score:2)
Is to persuade governments to fund research. BNFL burned renewable funding. The US repeatedly blocks fusion and is currently anti-science.
Now hold on just a minute. (Score:2)
How many coal men will be put back to work in the coal mines if they make fusion energy work?
'nuff said...
#MAGA
It's About the Human Infrastructure (Score:2)
When thinking long-term about an area of science or technology, it is important to think about sustaining the development and retention of people across multiple professional generations. The government should be planning in terms of how many people it is going to sustain in developing fusion power for multiple decades and then do it. You have to pay the people, and you have to pay for the machines that the people are going to build to learn more. Otherwise you end up losing the people who know what they ar
Premature? (Score:2)
and then develop its own plan for a "compact power plant.
Might it not be a good idea to wait until a self sustaining fusion reaction has been achieved before setting out to design fusion power plants?
My guess is that once it becomes clear that a fusion power plant is doable and the economics are viable, getting funding -- private and/or public -- is unlikely to be all that big a problem.
Communist bullshit (Score:2)
Also, investments in free and clean energy are anti-American. We have goals of reducing emissions standard requirements to promote the free market and allow people to right to choose to drive cars that consume more fuel. If you were to interfere by decreasing the value of energy, this would interfere
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The big mistake was made back in the 1950, fast energy rather than slow energy. How to get as much energy out of the radioactivity as fast as possible because of the focus of engineers and dick brains (military et al). The focus should have been slow energy. Not how quickly you can get energy out of radioactivity but how you can trickle it out over a very long period ie many nuclear reactors with a single fuel load, small, much more stable and that fuel load, lasts the life of the reactor, probably re blend
Re: I am sure it's 20 years away (Score:5, Insightful)
Um... a fusion reactor canâ(TM)t explode. If you lose containment of the plasma it dissipates and you need to restart your reactor.
Fusion is hard. Fission is trivially (and therefore dangerously) easy.
Re: I am sure it's 20 years away (Score:4, Informative)
Chernobyl suffered a thermal explosion. So much energy built up so quickly the reactor fuel vaporized and blew apart the building. It was not a nuclear explosion. And it should be noted that Western nuclear reactors cannot blow up as Chernobyl did because they're designed with a negative void coefficient [wikipedia.org]. They're designed so if the cooling water starts to boil, it slows down the nuclear reaction. Chernobyl's design used a positive void coefficient - boiling water sped up the nuclear reaction. The moment its coolant started to boil, the reactor was doomed. Positive void coefficient reactor designs were never used in the West because of this inherent instability. The Soviets were more interested in building something cheap, rather than safe.
Even the right isotope of uranium or plutonium, building a bomb is very hard to do. The materials will not blow up in a nuclear explosion by themselves.. There were two supercriticality accidents with a plutonium core [wikipedia.org] during the Manhattan Project. The two halves were accidentally put together close enough where the nuclear reaction became self-sustaining. All that happened was it gave off a bunch of radiation killing the nearest scientist. It did not blow up.
To make it blow up in a nuclear explosion, you have to crush the uranium or plutonium far beyond its normal state. The atom bomb dropped on Hiroshima used a gun. A uranium bullet was fired at another uranium mass, briefly increasing the density beyond that needed for the supercriticality to cause a nuclear explosion. The atom bomb dropped on Nagasaki used explosives to implode a shell of plutonium (this is the method used in modern nuclear weapons). When the shell pieces collided in the center, their density briefly exceeded what was needed for a nuclear explosion. if they don't all meet in the center at the exact same time, then either there's no nuclear explosion, or you get a small nuclear explosion (this is why the yields in North Korea's nuclear tests were so small as to almost not register on monitoring equipment)..Getting all those explosives to go off at the exact same time with the right force in the right direction is really, really hard.
Incidentally, fusion is so much harder to achieve that a fission nuclear bomb is used to create the pressures and temperatures needed to get hydrogen to begin to fuse, causing a fusion explosion. That's where the term "thermonuclear" comes from.
Re: I am sure it's 20 years away (Score:2)
Fission reactors can't suffer nuclear detonation either ... Chernobyl suffered a thermal explosion.
Scientists might disagree [researchgate.net]
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Of more concern would be the extremely large magnetic containment fields or the very high power systems needed to generate them.
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a fusion reactor can't explode
I'll bet you a six-pack that the intellectual descendants of the geniuses who built the Chernobyl reactor can blow a fusion reactor up. But I'll give you that the explosion probably won't be all that big and the radioactive debris will probably be a lot less long lived and noxious than those from a damaged fission reactor.
Re:I am sure it's 20 years away (Score:5, Informative)
Ahh, this old canard.
Here, this handy little chart [imgur.com] should help you understand what is actually meant with that.
Re: I am sure it's 20 years away (Score:2)
Nopw, the latest news from Germany puts it at 5 years. Skepticism is for real minds. Cynicism is for fools.
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Worldwide funding for fusion research has already exceeded $50 billion with no meaningful result. Time to move on.
That's a tiny sliver of capital compared to other human endeavours, many of far more questionable merit.
Fusion research is important, but not urgent. Let its development continue. In the meantime, embrace other viable renewable and low-CO2 alternatives.
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"It's called the International Thermonuclear Experimental Reactor (ITER) project, and its centerpiece is a large, doughnut-shaped, Russian-inspired reactor called a tokamak"
Robert Bussard didn't have a lot of positive things to say about tokamaks when he gave a Google tech talk on fusion back in 2006
Re:Why? It doesn't work (Score:5, Funny)
It will work fine, you just have to make it larger - say, 186,000 miles in diameter. We have documented evidence of functionality.
Re: Why? It doesn't work (Score:2)
But it works! (Score:3)
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There is not enough fuel. Tritium is very unstable and must be continually produced to provide a fuel source. If you're producing or harvesting enough tritium, you either have a fleet of fission reactors already producing far more energy than fusion reactors can harvest from the tritium byproducts, or you have solar sails collecting tritium and potentially harvesting _vastly_ more solar energy than the tritium can produce.
There are some interesting boron fusion designs, rather than tritium and deuterium, bu
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Fusion neutrons are actually valuable enough in itself, they can be used profitable even in sub-ignition tokamaks.
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ITER Is a distraction from fusion efforts that may one day be practical, which may be why it is the focus of funding. Contrary to your assertion, Bussard's Polywell has been making steady progress with a pittance of funding, and is still more likely to be commercially successful. So are a number of other projects, none of which are doughnut shaped.
I actually did a review of various alternative fusion systems and as a result I actually invested several of hundred thousand dollars into Tri-Alpha Energy. So I know exactly what's going on in that field. Polywell basically failed to show that its scaling laws work. It might still work out in the end but there are reasons to believe it won't.
Tokamaks are still the safest bet. A commercial power reactor will be smaller than ITER and it'll be much cheaper. ITER is built conservatively with low-temperature
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Shortsightedness (Score:2)
Sure it did. It got us the electoral collage, which in turn got us Trump. It got us a constitution with zero penalties for violating it, which in turn got us continuous violations of the "highest law in the land." It also got us a supreme court that does whatever it likes WRT the constitution instead of requiring actual adherence to what article five says is required for changes to the document. It got us the drug war, into all manner of hot wars, brought us sla
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Sure it did. It got us the electoral collage, which in turn got us Trump.
And Lincoln. And it spared us from the complete horror show of the Clintons regaining power, and Hillary seating SCOTS justices (more on which, below).
It got us a constitution with zero penalties for violating it, which in turn got us continuous violations of the "highest law in the land."
Because the COTUS isn't a penal code. It provides vital checks-and-balances structure, and (most importantly) it talks about what the government may not do, especially to individuals. It's up to the legislature to arrive at specific penalties on criminal matters. But the three co-equal branches DO provide "penalties," in the sense that the legislature can i
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Re:Why? It doesn't work (Score:5, Informative)
There are some pretty well established scalings that have been determined, basically saying if you have a given magnetic field, tokomak radius and shape, you will get a specific Q. The basics of containing plasma in a tokamak have been worked out some decades ago, and some of the final details have been worked out in the last 20 years, like disruption prevention and mitigation schemes.
We know a fusion reactor will work if built big enough (and I'm not talking about the joke about making it the size of the sun). The question is what is the least amount of increase in size we can get away with, because costs scales very roughly with volume of the reactor. How much stronger magnets can we develop and how much heat flux can the first wall takes (gets worse for smaller machines)?
This is getting into the realm of engineering, where the question is not, "Is it possible?," but instead, "Is it possible on a economical budget?"
Re: Why? It doesn't work (Score:2)
Care to explain why multuple sites niw have multi-minute fusion reactions? No? Oh, that IS a surprise.
A wretched hive of... plasma (Score:2)
Humanity's been around watching birds fly for tens of thousands of years.
But we've only had significant flight capability for about a century.
Seems to me it might be a little premature to be saying "This isn't the technology you're looking for. Move along. Move along."
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The total spent on fusion since 1954 is $24 billion. Wonder how much that is per facility per year. After all, the Manhattan Project only cost $22 billion and fusion can't be any more difficult than banging two rocks together really hard.
The total spent on fossil fuel is $21 trillion a year. Obviously that can't work, either.
They'd been trying to build computers since 100 BC, obviously those are impossible.
They'd been trying to find a Higgs boson since the 1960s. Obviously they don't exist.
They'd been tryin
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