[Lex Computer & Tech Group/LCTG] Fusion

[L Wittig]

Mike --
I didn't mean to imply that beryllium and lithium are all that expensive,
just not as dirt cheap as deuterium.  However, it looks like there is a lot
of processing needed before being used, and that will drive up the price.
I also don't know if the ceramic pebbles need to be replaced from
time-to-time.
--Larry
[image: image.png]

On Thu, Mar 24, 2022 at 10:54 PM Michael Alexander <mna.ma at yahoo.com> wrote:

> Maybe I misunderstand the last part of Larry’s post:  beryllium and
> lithium are rather common elements.  Maybe there are special requirements –
> purity, for example?
>
> Is it possible that some beryllium (Be) and lithium compounds would be
> suitable for the neutron multipliers?  Pure lithium oxidizes easily, so a
> stable compound might have practical advantages.  Beryllium is stable, but
> BeO might be less expensive (I don’t know).
>
> A side note: Be is very poisonous, damaging the lungs.  When I did an NMR
> study of Be, the powder sample was encased in a very heavy-duty glass
> tube.  A special facility had manufactured the sample (one wouldn’t buy
> it on Amazon, I think … although I haven’t checked).
>
>     – Mike Alexander
>
>
>
> On Thursday, March 24, 2022, 12:33 PM, L Wittig <9423lew at gmail.com> wrote:
>
> I watched Rein’s presentation (not the Q&A).  He spent a fair amount of
> time talking about how plentiful and cheap deuterium is. Indeed you can get
> it from water by simple electrolysis. It could hardly be any cheaper. But
> he didn't talk about tritium, which is more complicated.  If you wanted to
> buy it it costs ~$300,000/gram and has a 12 yr half life; probably the most
> expensive material on earth bar none. (
> https://en.wikipedia.org/wiki/Tritium#:~:text=As%20of%202000%2C%20commercial%20demand,approximately%20US%2430%2C000%20per%20gram.
> ) The cost is high because it is a byproduct of breeder reactors. HOWEVER
> for use for fusion it can be breed inside the reactor by bombardment of
> beryllium and lithium. Fortunity, there is a lot of research on this
> (MIT/CFS don't have to develop it.) It does mean you need to procure
> beryllium and lithium which is a more expensive process than  procuring
> deuterium. Beryllium and lithium blankets for fusion reactors are discussed
> here starting about one-fourth of the way down:
> https://www.fusion.qst.go.jp/rokkasyo/en/project/blanket.html
> [image: image.png]
>
>
> On Thu, Mar 24, 2022 at 8:14 AM john rudy <jjrudy1 at comcast.net> wrote:
>
> 85 minutes
>
>
>
> John Rudy
>
> 781-861-0402
>
> 781-718-8334 (cell)
>
> John.rudy at alum.mit.edu
>
>
>
> 13 Hawthorne Lane
>
> Bedford, MA  01730-1047
>
>
>
> *From:* Robert Primak <bobprimak at yahoo.com>
> *Sent:* Thursday, March 24, 2022 6:03 AM
> *To:* Lex Computer Group <lctg at lists.toku.us>; john rudy <
> jjrudy1 at comcast.net>
> *Subject:* Re: [Lex Computer & Tech Group/LCTG] Fusion
>
>
>
> We haven't had a session on fusion in awhile. Would this update take a
> whole session? Are there any other items to group with this topic?
>
>
>
> -- Bob Primak
>
>
>
>
>
> On Wednesday, March 23, 2022, 07:55:22 PM EDT, john rudy <
> jjrudy1 at comcast.net> wrote:
>
>
>
>
>
> Here is Rein’s recent Fusion talk.  It is fascinating.  Start at about 7
> mins after the stuff dealing with my class and out reunion
>
> John
>
>
>
>
> https://1967.alumclass.mit.edu/s/1314/2015/club-class-main.aspx?sid=1314&gid=58&pgid=60177
>
>
>
> John Rudy
>
> 781-861-0402
>
> 781-718-8334 (cell)
>
> John.rudy at alum.mit.edu
>
>
>
> 13 Hawthorne Lane
>
> Bedford, MA  01730-1047
>
>
>
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