Alternative Reactor Design

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Richard Hull
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Re: Alternative Reactor Design

Post by Richard Hull » Sun Jan 07, 2018 4:09 pm

There remains no source of continuous, un-interrupted, intense, stable neutron flux on earth, other than a functioning fission reactor..... Period!
Fusion??? Phooey......

Nothing on this planet breeds fission or fusion fuel like a real fission reactor. All other neutron sources don't rise to the elevated level of even dis-honorable mention. At best, they are struggling little putt-putt boats in a child's bathtub in comparison.

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

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Rich Feldman
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Re: Alternative Reactor Design

Post by Rich Feldman » Tue Jan 09, 2018 10:32 am

There are some world-class accelerator based neutron sources that get pretty darn close (as laboratory beamlines for studying materials or basic physics). When high neutron fluences are needed for production processes, whether breeding fuel or doping silicon ingots, the work has to be within or very close to a fission reactor core, like Richard said.
fluxes.JPG
Found that in a paper written by a spallation enthusiast: http://www.iaea.org/inis/collection/NCL ... 099436.pdf
It also has a tantalizing mention of pulsed fission reactors.
flux2.JPG
Richard Feldman

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Re: Alternative Reactor Design

Post by JoseRey » Tue Jan 09, 2018 9:10 pm

Rich Feldman wrote:
Tue Jan 09, 2018 10:32 am
There are some world-class accelerator based neutron sources that get pretty darn close (as laboratory beamlines for studying materials or basic physics). When high neutron fluences are needed for production processes, whether breeding fuel or doping silicon ingots, the work has to be within or very close to a fission reactor core, like Richard said.

fluxes.JPG
Found that in a paper written by a spallation enthusiast: http://www.iaea.org/inis/collection/NCL ... 099436.pdf
It also has a tantalizing mention of pulsed fission reactors.flux2.JPG
But spallation sources typically don't work continuously but pulsed, so background measurements can be taken and compared to those with the pulse.

Integrated over time the amount of neutrons produced by a spallation installations is much lower that a fission reactor, but they are ok to test products, processes and instruments, for continuous breeding a fission reactor can't be beaten, it's only necessary to have a right place to put your stuff.

Anyway, fusors neutron output is soooo low that it's basically useless, and theoretical big fusion reactor would harvest the kinetic energy, to create electricity, so they aren't suited either

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Richard Hull
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Re: Alternative Reactor Design

Post by Richard Hull » Tue Jan 09, 2018 9:37 pm

Thanks for recognizing that I was talking about absolute, 100% continuous neutron flux systems that are start'em up then walk away for months, years with a good stable flux. Only one exists....Fission reactors. Waste heat makes electricity. Fission reactor neutrons can make more fission and fusion fuel if you've got the guts to breed while putting out a giga-watt or more of electricity. About as straight forward a continuous, useful, neutron source as man will have into the very distant future.

Pretty darn close wins no cigar..........Close only counts in horse shoes and hand grenades.

Currently, we have no guts and therefore, will have no glory

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

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Re: Alternative Reactor Design

Post by danielchristensen » Wed Feb 14, 2018 5:53 pm

Hi all,

We actually operate a system that is conceptually similar to this idea at Northwest Nuclear Labs. I was involved with the project that ended up retrofitting the central cathode during the 2014-2015 school year. We did not, however, experiment with magnets because would cause complexity that is not necessarily beneficial to a team of high school freshmen that have very little experience around fusors. We were already operating a cathode that differed from the traditional geodesic grid, which can be seen in the image below (which is a helium plasma instead of deuterium).
Helium Plasma.png

My team went a step further and implemented a single ring as a cathode, which is seen in the below images. The top photo comes from my current research into Langmuir probe plasma imaging, which is a story for another time.
Probe in Plasma 3.jpg
Expanding Deuterium Plasma.jpg
When we implemented the linear cathode, we saw an increase in neutron flux of around 12%, which brought us up to the range of 1 million neutrons per second. We originally attributed this to higher plasma density, which was based solely on visual evidence (brighter plasma). We plan to test this claim once our imaging system is operational.

Regards,
Daniel Christensen

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Richard Hull
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Re: Alternative Reactor Design

Post by Richard Hull » Wed Feb 14, 2018 9:05 pm

Thanks Daniel. A number of years ago Jon Rosenstiel experimented with a number of different grids even a solid ball and it did fusion! The grid design is not hyper critical. A needle point will do fusion just fine. Doug Coulter has used only a cylinder grid in his superb fusor for years. This is just a form of a ring with large width. We never touted or offered the spherical or the geodesic as as the absolute and only grid, but just a typical original design.

We look forward to your future reports on the ring grid. Keep us in the loop. We are now seeing, through others efforts, that a spherical chamber of larger size is not needed. Smaller may be better.

Folks pokin' around in the fusor area is always a good thing. Remember, "Research is what I'm doing when I don't know what I am doing."

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

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