Breakthrough in Nuclear Fusion? - Prof. Dennis Whyte

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Strong rec cromwellian · 2020-12 · on “South Korea's fusion device KSTAR runs for 20 seconds at 100M degrees Celsius”

Watch Robert Whyte's presentation. [this video] The basic problems have all been solved, the science has been solved too. Tokamaks have already made net fusion power. The only difference between JET, which already succeeded, and ARC, is using Magnets with 2.6x the field strength. The B^4 power scaling, gives you about 50x the power, so ARC will generate 500 MW of power whereas JET (remember, already proven engineering), generated 10MW. So without a doubt, this is just an engineering problem at this point. A prototype device that didn't have to be maintained, could be built exactly like any other Tokamak, just with REBCO magnets, and you'd have the required fusion power. To get the required electr

Strong rec runnerup · 2021-11 · on “China to build 150 nuclear reactors- more than rest of world over last 35 years”

> “People say nuclear is expensive in the West, but they forget to say it’s expensive because of interest rates,” Morin said. It's still a valid criticism if: - They could get those high interest rates from the return on other capital projects (nuclear less return than something else) - All externalities are included in costs We only have so much labor/material/energy available, and we do have to have some way of allocating them to the things with the most return. The big issue, obviously, is that tons and tons of negative externalities aren't priced in to most economic endeavors, that might make fission look a lot better. It might make it look a lot worse. Personally I'm hoping Elon/Mackenz

Strong rec maccam94 · 2021-12 · on “After years of doubts, hopes grow that nuclear fusion is near”

Commonwealth Fusion Systems has addressed all of those issues: 1. The higher field strength from the new HTS magnets eliminates turbulence. 2. The ARC reactor will use a FLiBe molten salt blanket to capture energy from neutrons and breed tritium to be used in the fusion reaction. 3. The ARC reactor is designed to have a swappable 2cm thick vacuum chamber, which is the component subjected to the most neutron radiation (everything else is shielded by the molten salt blanket). These chambers are expected to last a year, and while they are moderately radioactive waste, the amount of material is relatively small and they should become safe in the order of a decade. I highly recommend watching Dr.

Recommends maxharris · 2017-11 · on “For the love of Earth, stop traveling”

Instead of trying to reduce options for people, why not put your energy toward something positive, like this? [this video]

Recommends scottmsul · 2018-03 · on “Lockheed Martin has obtained a patent for a compact fusion reactor”

The real deal is here, from MIT: [this video] Apparently there was a recent breakthrough in superconductors, which allows significantly more current in the inductor coils while still maintaining superconductivity. This in turn allows for much stronger magnetic fields, hence tighter confinement of the plasma and therefore more fusion. A standard tokamak with these new superconductors should produce more energy out than energy in, and be a viable source of energy.

Recommends JumpCrisscross · 2018-03 · on “Lockheed Martin has obtained a patent for a compact fusion reactor”

Eye opener is the chart at 18:03: "from 1970 to 1995, [fusion] power and energy increased much faster than computing power (Moore's Law)" [1]. Magnetic-confinement fusion stalled, according to Dr. Whyte, because to get more power (and efficiency) we need stronger fields. To get stronger fields we needed bigger magnets. To support bigger magnets one needs bigger structures. Big magnets and big structures will absorb more magnetic and neutron flux; that increases maintenance frequency, complexity and cost. Better superconductors let us get stronger fields without bigger magnets. That changes the cost function. [1] [this video]

Recommends mastax · 2018-07 · on “Ask HN: What talks or videos do you suggest to watch on a long flight?”

"Breakthrough in Nuclear Fusion?" - Professor Dennis Whyte. [this video] The title threw me off, but it's a very interesting and grounded talk about the different approaches to scaling fusion energy.

Recommends DesiLurker · 2020-09 · on “Compact nuclear fusion reactor is 'very likely to work,' studies suggest”

yes thats true. ITER is obsolete already because it actually cannot use these high-temp-high-Tesla superconductors. at the moment ITERs best hope is that it 'proves' that fusion is viable & then do a full redesign for DEMO to do proper scaled operation. here is the original presentation by Dr Whyte of MIT behind this Sparc project: [this video] he talks about the impact of these newer magnets at around 26min mark.