Mining the Moon---for Helium-3

Search
Go

Discussion Topic

Return to Forum List
This thread has been locked
Messages 61 - 63 of total 63 in this topic << First  |  < Previous  |  Show All  |  Next >  |  Last >>
Curt

climber
Gold Canyon, AZ
Apr 27, 2016 - 08:15am PT
Not only that, but a fusion energy economy would be very disruptive, displacing the current carbon energy economy. The ramifications of that transition are not well studied (at least studies of that type are not known to me).

Well, the transition away from a carbon energy economy is happening anyway. I think the handwriting's on the wall. Some of these kinds of studies have been done in the form of extrapolations accompanying the growth of solar, wind, etc.

Curt
Ed Hartouni

Trad climber
Livermore, CA
Apr 27, 2016 - 09:14am PT
The energy sector's dependence on carbon fuels is pretty overwhelming, I think it is premature to say that the transition away from carbon energy is happening in any meaningful way. Carbon fuels are still the least expensive to use, the costs of exhausting the byproducts are not included in the pricing. Once that happens, you'll see the transition occur.


NIF was not built to be a commercial reactor demonstration, it is a research facility that demonstrated breakthrough laser technologies and diagnostic capabilities which allows for detailed studies of the implosions.

The maximum rate of firing the NIF lasers is set by the optics' temperature. When the optics are heated, they distort and spoil the optical paths. Not only that, the energy density in the optics is at the damage limit, which means that optics damaged beyond the capability of in situ repair need to be replaced.

There is no "auto-load" capability for the capsule/hohlraum/TMP target, which is currently placed and tracked to microns.

The LIFE project, which has been abandoned, had technological answers to these engineering problems. The demonstration of technologies for commercial reactors has to wait for ignition, and the determination of the "operating point" for high yield fusion. This is a physics question, and the subject of the current research program.


I guess I should say that these are my own opinions and are not necessarily shared by LLNL, NNSA, the DOE or the USG...
Brokedownclimber

Trad climber
Douglas, WY
Topic Author's Reply - May 8, 2016 - 05:25pm PT
This is an answer to some of Ed's comments. I was unable to spend enough time dredging these excerpts from Dr. Zubrin's book before travelling in business.

Entering Space, Creating a Spacefaring Civilization; Robert Zubrin (1999); Tarcher-Putnam.

On p. 84: The other proposal, that of Professors Jerry Kulcinski and John Santarius of the University of Wisconsin, is considerably more interesting. These gentlemen propose to mine the lunar regolith for its Helium-3, then export this unique substance to Earth for use in its fusion reactors. Now, one obvious and frequebtly noted flaw in this plan is that nuclear fusion reactors do not exist. However, that fact is simply an artifact of the mistaken priorities of the innocent gentlemen in Washington, D.C., and similar places who have been controlling scientific research and development's purse strings for the past few years. Lack of funding, not any insuperable technical barriers, currently blocks the achievement of controlled fusion The total budget for Fusion research in the United States currently (1999) stands at $250 million per year--less than half the cost of a shuttle launch, or, in real dollars, about one third of what it was in 1980. Under these circumstances, the fact that the fusion program has continued to progress and now is on the brink of ignition is little short of remarkable. .quote]

Jumping to page 86:
Currently the world's fusion programs are focused on achieving the easiest fusion reaction, that between Deuterium and ...Tritium.

A bit later the Deuterium-He-3 reaction is discussed in detail.


Messages 61 - 63 of total 63 in this topic << First  |  < Previous  |  Show All  |  Next >  |  Last >>
Return to Forum List
 
Our Guidebooks
spacerCheck 'em out!
SuperTopo Guidebooks

guidebook icon
Try a free sample topo!

 
SuperTopo on the Web

Recent Route Beta