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Skunk Works Reveals Compact Fusion Reactor Details

aviationweek.com

121–130 of 375 posts

Re: Skunk Works Reveals Compact Fusion Reactor Details

#121
post #56

Earlier quoted context omitted.

Kind of a stretch to call a nuclear warhead a "reactor"...

It is a reactor when used, for a couple of nanoseconds....

While Wiktionary has "A device which uses atomic energy to produce heat" as one definition, other dictionaries all include the ability to regulate/control/sustain a nuclear reaction. I'm inclined to agree with them.

Re: Skunk Works Reveals Compact Fusion Reactor Details

#123
post #100

From the article: Lockheed shares fell 0.6 percent to $175.02 amid a broad market selloff. Shouldn't the market be a little more excited about this?

The general consumer sentiment and state of the economy are much more important even for a company such as Lockheed (slow economy > less profits > less taxes > less DoD spending) than unproven (as of now) claims about yet another fusion reactor.

Re: Skunk Works Reveals Compact Fusion Reactor Details

#125
25 years ago my nuke professor used to scoff at some of the claims of the fusion researchers. The problem is the high energy neutrons flying out of the reactor will neutron-activate every material within the vicinity. He thought the radioactivity and nuclear waste of a fusion reactor could be worse than a fission reactor. Also he thought that fusion researchers were vastly underestimating the problem of neutron embrittlement of the reactor structures and components. This is a very difficult engineering and material science problem that would have to be solved even if they did get the fusion process to work.

Re: Skunk Works Reveals Compact Fusion Reactor Details

#128
post #114

Earlier quoted context omitted.

Fusion physicists I know are very sceptical that this design can work. It's a variant on a known design with a known problem: the plasma leaks out of the ends of the magnetic containment. It's also unclear why Lockheed would be publicising it this way at this point, unless it's a naked ploy for more funding from the DoD, and an attempt to bring in money (and possibly pressure) from non-classified sources. That being…

From the Aviation Week article that flexie linked: "The team acknowledges that the project is in its earliest stages, and many key challenges remain before a viable prototype can be built." They don't actually say it, but it sounds like they've only got computer models to work with at this point. Not very likely that they've actually cracked it.

Aditional weird: this is the second round of publicity they've had on this project, for what looks like no progress. Why publicise? Why now?

Re: Skunk Works Reveals Compact Fusion Reactor Details

#130
post #65

> could be ready for use in a decade. That's the standard issue joke. "Nuclear fusion has been just ten years away for the last fifty years" It is so common as a joke I'm surprised the article didn't mention it.

No, the standard joke is "thirty years away." Or at least it was. Strangely enough the number keeps decreasing with the passage of time.

Google Results: fusion "x years away"

10 - 765,000 results

15 - 9,730 results

20 - 793,000 results

25 - 8,750,000 results

30 - 709,000 results

35 - 4,700,000 results

40 - 472,000 results

45 - 10 results

50 - 493,000 results

Definitely not 45 years away.

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