Catch up on stories from the past week (and beyond) at the Slashdot story archive

 



Forgot your password?
typodupeerror
×
Power Science Technology

World's Largest Nuclear Fusion Experiment Clears Milestone (scientificamerican.com) 161

An anonymous reader quotes a report from Scientific American: A multination project to build a fusion reactor cleared a milestone yesterday and is now six-and-a-half-years away from "First Plasma," officials announced. Yesterday, dignitaries attended a components handover ceremony at the construction site of the International Thermonuclear Experimental Reactor in southern France. The ITER project is an experiment aimed at reaching the next stage in the evolution of nuclear energy as a means of generating emissions-free electricity. The section recently installed -- the cryostat base and lower cylinder -- paves the way for the installation of the tokamak, the technology design chosen to house the powerful magnetic field that will encase the ultra-hot plasma fusion core. The entire project is now 65% complete, the officials said. "Manufactured by India, the ITER cryostat is 16,000 cubic meters," ITER officials said in a release. "Its diameter and height are both almost 30 meters and it weighs 3,850 tons. Because of its bulk, it is being fabricated in four main sections: the base, lower cylinder, upper cylinder, and top lid."
This discussion has been archived. No new comments can be posted.

World's Largest Nuclear Fusion Experiment Clears Milestone

Comments Filter:
  • by NoNonAlphaCharsHere ( 2201864 ) on Wednesday July 24, 2019 @11:44PM (#58983004)
    Fusion, along with "electricity that's too cheap to meter", has been "10 years away" for the last 50 to 60 years. Moving that up to "6-1/2 years away" is a real milepost!!! Flying cars next FTW!!!
    • by Empiric ( 675968 )
      reaching the next stage in the evolution of nuclear energy

      The 3-1/2 year savings is apparently due to randomly changing around the subcomponents, rather than having scientists and engineers continue to waste time designing the thing.
    • by ron_ivi ( 607351 ) <sdotno@cheapcomp ... m ['ces' in gap]> on Thursday July 25, 2019 @12:05AM (#58983066)
      In case people think he's kidding:
      • Back in 1958 we were 2 years away:
        AEC Scientists Anticipate Threshold Of Harnessing Fusion Power in 2 Years"
        - The Wall Street Journal Aug 1, 1958
      • By 1971 "setbacks" made it so that it was at least 5 years off:
        Recent Los Alamos Scientific Laboratory test indicate scientists may be only five or so years away from the first demonstration of sustainable [which is what they called "as much energy out than in, in a way that could be productized" back then] fusion.
        - The Spokesman-Review - Apr 28, 1971
      • By 1977 it went up to 20 years:
        Oct 26, 1977 Nuclear Solution That's 20 years away
        - The Glasgow Herald - Oct 26, 1977
      • By 1982 it went up to 30 years:
        government officials estimate that commercially feasable fusion power remains at least 30 years away
        The Montreal Gazette - Dec 29, 1982

      Edit: For more serious history with actual cost estimates - this http://www.fas.org/sgp/othergo... [fas.org] is one of the more technical documents with predictions from the 1970's of the first intertial confinement laser fusion system that was supposed to achieve breakeven. It has choice quotes like "this is our breakeven laser ... $62.5 million".

      • by ron_ivi ( 607351 )
        Citations: https://news.google.com/newspa... [google.com] https://news.google.com/newspa... [google.com] https://news.google.com/newspa... [google.com] Darn Wall Street Journal changed links on me and I can't find the 1950's article anymore.
      • Mod parent up; second best Slashdot comment ever.

        But on topic, I don't see how this will ever be economically viable. Nuclear fission costs have skyrocketed, [powermag.com] like the cited Vogtle example, to a point where no self-respecting commercial company is going to embark on that. And ITER -- which is just a proof-of-principle experiment -- is 2x to 3x of that.

        Compare the scope of ITER to the scope of the first human-made fission reactor: Fermi's experiment in the squash courts of the University of Chicago.

        Oh,

        • by sjbe ( 173966 ) on Thursday July 25, 2019 @07:57AM (#58984004)

          I don't see how this will ever be economically viable. Nuclear fission costs have skyrocketed, like the cited Vogtle example, to a point where no self-respecting commercial company is going to embark on that.

          A) Nuclear fission is a completely different technology than fusion so you are really are comparing proverbial apples to oranges
          B) The reasons fission is so expensive is because its failure modes are REALLY dangerous (see Chernobyl + weapons proliferation)
          C) The failure modes for a fusion reactor are not substantial problems and not particularly dangerous ergo less safety engineering and less insurance
          D) The costs and problems of nuclear fission have no relationship to the costs and problems of nuclear fusion
          E) Fusion does not have the waste disposal problems of fission nor is its fuel particularly dangerous or rare or hard to handle safely
          F) Fission has problems with nuclear weapons proliferation. Fusion (for power) does not. This too is a factor in the cost of fission.

          The ONLY real question with fusion is whether or not we can actually do it economically. That question hasn't been answered yet because we are still working out the science and engineering. Maybe we'll figure it out with ITER in a few years or maybe some other project or maybe we never will. But that question has NO relationship whatsoever to the costs and problems of nuclear fission. If fusion works then it appears to solve a whole raft of problems with our current non-renewable energy sources in an almost ideal way. Whether we can get fusion to work as a usable power source and do so economically remains an open question but it's a question very much worth investigating considering the potential upside.

          And ITER -- which is just a proof-of-principle experiment -- is 2x to 3x of that. Compare the scope of ITER to the scope of the first human-made fission reactor: Fermi's experiment in the squash courts of the University of Chicago.

          Can do but you are comparing the wrong things. The Manhattan project adjusted for inflation cost around $23 billion [ctbto.org] in 2007 dollars which would be around $28 billion in 2019. The cost of ITER? About $20 billion [sciencemag.org] so far or approximately the same once you adjust for inflation. They are roughly comparable large projects aimed at the first viable functional implementation of a new technology for real world use.

          Now the success of ITER is not a foregone conclusion. But the cost to figure out fusion appears to be roughly comparable to the cost of figuring out fission provided we are successful.

          Oh, and lastly ... you spend 80% of your time doing 20% of the work. I don't think they're 6.5 years away.

          Based on what? You might be right but you certainly are providing no evidence to support your assertion. Also bear in mind that ITER is far from the only game in town in trying to figure out fusion. It's just the biggest and most high profile but there is a LOT of effort going into figuring out fusion because the first to figure that technology out stands to make almost unimaginable amounts of money.

          • Fusion reactors involve quite a bit of fission.

            The hydrogen / helium fusion produces neutrons. Those neutrons are captured wih lithium in a fission reaction to produce hydrogen, helium and energy. Quite a bit of energy, in fact.

            • Fusion BOMBS require quite a bit of Fission. You're confusing the technologies quite a bit.

              Fusion REACTORS need quite a bit of ENERGY to start the reaction. The trick is to keep it going with a net positive of energy output.

          • B) The reasons fission is so expensive is because its failure modes are REALLY dangerous (see Chernobyl + weapons proliferation)

            Two things:

            1) Chernobyl was such a catastrophe as we've not seen since the last airliner crashed. Or normal traffic deaths in the USA this morning.

            1) No, nuclear power plants don't produce Pu239 in useful quantities. Which is what we use in nuclear bombs. Pu239 is produced in reactors specially designed to do so. Which means that weapons proliferation from commercial power p

            • I'm a nuclear power proponent but I wouldn't claim Chernobyl parity with airplane crashes unless those crashes also resulted in mass evacuations from giant exclusion zones that are rendered uninhabitable for generations.
              • "Giant exclusion zones that are rendered uninhabitable for generations." -- About 1100 square miles is a lot, but now, 33 years later, most of that area is technically human-inhabitable without undue disease due to radiation. It's likely that the area won't be repopulated for a long time because it's now a nature preserve where several endangered species are thriving.
        • by necro81 ( 917438 )

          Compare the scope of ITER to the scope of the first human-made fission reactor: Fermi's experiment in the squash courts of the University of Chicago

          That is not an appropriate comparison. Fermi's experiment was just to see if they could produce a fission reaction. We've managed that same milestone with fusion already - decades ago. Hell, you can build a fusor [wikipedia.org] in your basement and start producing fusion in quick fashion. Your electricity meter will not run backwards, however.

          The more apt comparison i

      • by Anonymous Coward

        Maybe there is some relation with this [wikimedia.org]?
        Based on this [pppl.gov].

        Sure, there is more to it, but this is a big one. It indicates a lacking sense of urgency. I bet that if this project was run like the Manhattan project things would progress much faster.

      • Consider we mastered fusion back in the early 1950's - well the gross version of fusion in the form of the Hydrogen thermonuclear bomb.
    • Does that mean Free Beer Tomorrow is now Free Beer Later Today?
    • by Anonymous Coward

      First plasma in 6.5 years, not actual fusion. And certainly no net power generation, nobody claims that ITER will be capable of that. Actual fusion power is decades away, and everyone involved knows it.

    • by quenda ( 644621 )

      Fusion, along with "electricity that's too cheap to meter",

      This referred to marginal cost. Flat-fee un-metered supply is very common for television, mobile phone service, broadband internet, water supply, sewerage, road use, public transport, etc. These things cost many billions to provide, but can operate without meters.

      While un-metered electricity has not happened, millions of people have benefited from unmetered piped central heating from nuclear power.

    • I thought the milepost was "dignitaries attended a ... ceremony"
  • by Waffle Iron ( 339739 ) on Wednesday July 24, 2019 @11:46PM (#58983012)

    This project may be rushing things. It's already 65% complete, and now only 6-1/2 years before they start experimenting? That sounds reckless.

    I think that they should stand down and start a top-to-bottom review to make sure that they've dotted all of the i's and crossed all the t's before they proceed any further.

    • by Anonymous Coward

      Why?

      • Why?

        Because sarcasm. That's my guess. I'm open to other interpretations on the need to slow this project down further.

      • by Anonymous Coward

        Why?

        Because if you don't it is just a lokamak!

    • This project may be rushing things. It's already 65% complete, and now only 6-1/2 years before they start experimenting? That sounds reckless.

      Why does it sound reckless? It's "only" 6.5 years away? A project that has been going 12 years already? I would think that after 20 years you probably have quite a decent and well thought through test and commissioning plan.

  • If they go straight for a plasma chamber the size of a building, you know they are going to fail. That was exactly the problem with scaling up those ordinary nuclear reactors during the '70s. But recognizing failure takes decades, longer than the career of a government funded scientist.
  • by blindseer ( 891256 ) <blindseer@@@earthlink...net> on Thursday July 25, 2019 @12:49AM (#58983148)

    We had the first model of the atom that could describe nuclear fission in 1913.

    By 1945 we had created the first nuclear weapon.

    In 1954 the first nuclear powered submarine went to sea, crossing the North Pole beneath the arctic ice four years later.

    In 1956 the first commercial nuclear power plant opened in the UK.

    By 2013 there were 437 nuclear reactors in 31 countries.

    With fusion power we had plans laid for this first fusion reactor in the 1980s. This is such a large effort that no single nation was willing, or perhaps none were able, to fund it alone. We can expect this to produce some of the first bursts of fusion 30 years later. This reactor was never intended to produce more power than was put in, only to prove the concept and collect data for the next multi-national project that should produce a net power output. How long will that one take? Another 30 to 40 years? Assuming that one works then we might be able to expect nations to have enough to work with in making their own fusion reactors with even higher net output.

    So, if all goes well then maybe in 2080 we can see the first commercial fusion reactors producing power for use in homes and businesses. Then it will still take another 20 or 30 years for this to develop to a point where it's actually replacing other energy sources like nuclear fission did in the 1970s.

    I can certainly admire their tenacity and engineering skill. What I find problematic is the large numbers of people that claim we can simply wait for fusion power to replace coal power. Is global warming a real threat or not? If we can wait for nearly 100 years for a solution then is this really all that big of a problem?

    • by quanminoan ( 812306 ) on Thursday July 25, 2019 @01:09AM (#58983200)

      You're close to summarizing the arguments put forth by Lidsky back in 1985 (then in charge of MIT's fusion program):

      http://orcutt.net/weblog/wp-co... [orcutt.net]

      Anyone interested in Fusion should give it a read. This is part of the reason in general fusion scientists are optimists but fusion engineers are pessimists. Even if we succeed in net energy out it appears the costs of such a large plant (by necessity in design per Lidsky's arguments) will be far more expensive than fission plants. The cost of ITER is already in excess of $20 billion, and the successor slated to actually create power will be far more expensive with lithium capture blankets and steam cycles etc. The power output could be matched by smaller fission reactors.

      It's important research, but in my opinion fusion will only ever be commercial if a new approach is found beyond the tokamak which allows for greater stability with small compact reactors. Given we're almost a century of relentless pursuit of this goal with various designs (some fusion attempts predate WWII), I wouldn't hold my breath.

      • by Cyberax ( 705495 ) on Thursday July 25, 2019 @02:36AM (#58983358)

        The cost of ITER is already in excess of $20 billion, and the successor slated to actually create power will be far more expensive with lithium capture blankets and steam cycles etc.

        No. The successor of ITER will be MUCH cheaper. ITER is built basically with 90-s technologies - lots of low-temperature superconductors, sub-optimal central pillar design, etc. This is all fine. ITER is meant to be used as a burning plasma laboratory, there's simply no other way to investigate confined plasma properties at ignition temperatures. So a "simple" conservative design for ITER is a good idea, ITER designers didn't want to add even more technological risks.

        Once the plasma physics are clear, the successor is likely to be built with high-temperature superconductors, with a very thin central pillar, and it's going to be using neutral beam and microwave heating instead of changing field of the huge poloidal magnet.

        • I'd be thrilled if you're right, but to me it seems too hopeful. The central solenoid is very expensive since Nb3Sn technology (state of the art, not really 90s) is very difficult to fabricate with. You're right that HTS would be better, but it's so state of the art that hardly any magnets other than simple small solenoids are made from it. Large solenoids would require internal splicing techniques that haven't been developed yet. Further, present HTS is far more expensive than the latest Nb3Sn with powder

          • by Cyberax ( 705495 )
            It's even more complicated, magnets on ITER (and DEMO) will have to deal with a lot of mechanical stress from the field itself or from electromagnetic forces during quenching. Even the low-TC magnets for ITER have to be specially engineered with vacuum epoxy treatment to bond conductors and structural elements.

            High-TC superconductors are only now getting close to the required mechanical properties. The first full-scale high-TC MRI machine will probably be released next year. And this is huge, helium cooli
      • It's important research, but in my opinion fusion will only ever be commercial if a new approach is found beyond the tokamak which allows for greater stability with small compact reactors.

        There are some alternative designs, for example the Stellarator. They've been getting good results from one being developed in Germany, Wendelstein 7-X [ipp.mpg.de]

        Still, I put more faith in fission to be developed further, like a MSR or pebble bed reactor running on thorium. There are still some serious engineering problems to address before we can build a viable reactor, but these are nothing compared to the challenges to get fusion going. Development of thorium reactors hasn't had a lot of interest (or funding),

        • "Still, I put more faith in fission to be developed further, like a MSR or pebble bed reactor running on thorium. There are still some serious engineering problems to address before we can build a viable reactor, but these are nothing compared to the challenges to get fusion going"

          I note that side is still throwing up its hands and saying "fuck it, you solve it for me" about the waste problem.

          Anyone who supports fission plants before we have a working waste solution is agitating for evil.

          Don't be evil.

          • Thorium plants produce no long-living radioactive waste, and can 'burn" such waste from conventional plants. That's the theory, at least. In practise it might not work out, which is why we have to build a couple and find out. But as far as we know at this time, a solution for nuclear waste is exactly what we don't need for thorium plants. The plant is the solution.
          • Spent fuel is a mess -- 95% of the energy remains, but it can't support a chain reaction.

            That's okay.

            What you CAN do is add supplemental neutrons. Actually, you can design the reactor so that without these supplemental neutrons, there's no way to sustain a chain reaction, even with relatively fresh spent fuel. (This is probably a good idea)

            Where do you get these spare neutrons? Well, turns out that beryllium, bombarded with alpha particles, sprays neutrons everywhere. Alpha source? Tritium will work, b

        • Yeah, I like stellarators. Verdict is still out on if they are more stable and have better performance than tokamaks from what I understand (and hence experiments like W7X). In theory they should be better behaving than tokamaks without some instabilities like disruptions, but none have been made to particularly large size to verify this. If it does work out you're trading physics difficulty for engineering difficulty, but as an engineer the designs kind of excite me. You could imagine just using additive m

      • by shufflingb ( 5046321 ) on Thursday July 25, 2019 @08:54AM (#58984186)

        Fusion seems like a lot of money but the trick is to look at some of the other big things Governments spend money on.

        Back in the sixties America spent the equivalent in today's dollars of $702.3bn to go to the Moon https://www.cbsnews.com/news/a... [cbsnews.com] Even with today's technology the plan to do it again with Artemis is being estimate at $39bn https://spacenews.com/paying-f... [spacenews.com]

        Depending if you want the nuclear powered jacuzzi, big aircraft carriers are somewhere between $8 to $10bn a pop. With each aircraft on it typically north of $50m. The US Navy's new 12 boat fleet of Columbus nuclear missile submarines is apparently looking like $128bn https://time.com/5566107/navy-... [time.com] and the F35 program cost $406bn.

        Even in the UK, we're starting to build a high speed railway network to make commuting into London from the north a bit quicker. If it happens, the final cost of this based on internal reviews is currently estimated to be around £85bn https://www.independent.co.uk/... [independent.co.uk]

        Multiply that globally and it's plain to see that Fusions main problem is not cost or even the physics.

        Fusion's real problem is that globally we are saddled with leaders that fail to prioritise achieving limitless clean energy and a fighting chance with climate change against other trivia, like for instance saving about thirty minutes on a trip between London and Birmingham.

        • No argument with government spending on science, I would love to see it increased! My comment about $20 billion for ITER is more about what that means for a future commercial reactor. For a working commercial tokamak with full lithium capture etc to cost below $10 billion seems to me to be incredibly optimistic, and yet a smaller cheaper fission reactor could produce the same power out. Agreeing with the linked article by Lidsky I would say alternative fusion technologies need to be explored with practicali

    • by amorsen ( 7485 )

      What I find problematic is the large numbers of people that claim we can simply wait for fusion power to replace coal power.

      Name one.

    • We had the first model of the atom that could describe nuclear fission in 1913.

      By 1945 we had created the first nuclear weapon.

      In 1954 the first nuclear powered submarine went to sea, crossing the North Pole beneath the arctic ice four years later.

      In 1956 the first commercial nuclear power plant opened in the UK.

      By 2013 there were 437 nuclear reactors in 31 countries.

      With fusion power we had plans laid for this first fusion reactor in the 1980s. This is such a large effort that no single nation was willing, or perhaps none were able, to fund it alone. We can expect this to produce some of the first bursts of fusion 30 years later. This reactor was never intended to produce more power than was put in, only to prove the concept and collect data for the next multi-national project that should produce a net power output. How long will that one take? Another 30 to 40 years? Assuming that one works then we might be able to expect nations to have enough to work with in making their own fusion reactors with even higher net output.

      So, if all goes well then maybe in 2080 we can see the first commercial fusion reactors producing power for use in homes and businesses. Then it will still take another 20 or 30 years for this to develop to a point where it's actually replacing other energy sources like nuclear fission did in the 1970s.

      I can certainly admire their tenacity and engineering skill. What I find problematic is the large numbers of people that claim we can simply wait for fusion power to replace coal power. Is global warming a real threat or not? If we can wait for nearly 100 years for a solution then is this really all that big of a problem?

      Nobody is waiting for fusion to replace nuclear, they are already busy replacing coal with renewables. By the time fusion technology becomes mature the only coal plants left will be industrial history museums.

      • by Anonymous Coward

        Nobody is waiting for fusion to replace nuclear, they are already busy replacing coal with renewables. By the time fusion technology becomes mature the only coal plants left will be industrial history museums.

        No, coal is being replaced by natural gas.
        https://www.eia.gov/todayinenergy/detail.php?id=37952

        Planned retired capacity in 2019 is 8 GW, with most of that being coal but also some nuclear and natural gas.

        Planned added capacity in 2019? 8 GW natural gas, so right there this sinks that idea. Then comes 11 GW in wind, and the balance of the 24 GW total being solar and other. Is 11 GW of wind greater than 8 GW of natural gas? Sure. What is greater than the retired coal and nuclear is the 8 GW of natural ga

    • What I find problematic is the large numbers of people that claim we can simply wait for fusion power to replace coal power. Is global warming a real threat or not? If we can wait for nearly 100 years for a solution then is this really all that big of a problem?

      oh blindseer, you just can't help yourself. We don't want your fission ok? Let the innovation in renewables cover the gap to fusion.

      Two things can be a big problem at the same time. Some people are able to realize that most problems are not a binary choice. Global warming = bad, nuclear fission = not ideal.

      You know what they do with that big fancy extraordinarily dangerous nuclear power plant to make electricity? They boil water.

      Wind is free, sunlight is free, gravity is free. Innovations in renewable t

  • for the next 100 years, I promise to give you one billion dollars in less than 100 years. In fact each year I will cut in half the time you have to wait for the 1 billion dollars.

    Fusion Snake Oil Power.

  • like it does in pop culture. But surely these scientists and engineers are dragging their feet. If the thing is built already why haven't they turned it on and got plasma yet? I know funding isn't what we want it to be but how long did it take the Chicago pile to get running? This feels like SLS project levels of speed.

    • This test was about making sure they put together the high-voltage systems right. Saying it's "built" is incorrect.
  • Solar and wind are the CFL bulbs of the energy production world. Once LEDs became practical and better than other light sources, CFLs were toast. This might explain why there was such a push to ban incandescent bulbs so that GE could recoup their development and production costs before the party ended. Given this, and the prospect of practical fusion power, wind and solar power will basically be obsolete so anyone who invested heavily in it has to pass the buck before the music stops.

  • I hope it works. Fusion has been n years away as long as I have been alive.

    If it happens, the world will be a vastly better place.

    signed, I want to be an optimist but I've seen this too many times before.

    • Fusion has been n years away as long as I have been alive.

      So has World War III, but that hasn't happened yet, so...

  • Wouldn't you think that India might first develop a sanitation system so they didn't shit where they swim, wash clothes, and drink water?!

    Yet, we will be trusting their cryostat construction?

Top Ten Things Overheard At The ANSI C Draft Committee Meetings: (5) All right, who's the wiseguy who stuck this trigraph stuff in here?

Working...