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- Newsgroups: sci.physics
- Path: sparky!uunet!paladin.american.edu!darwin.sura.net!ukma!nntp.msstate.edu!Ra.MsState.Edu!rsf1
- From: rsf1@Ra.MsState.Edu (Robert S. Fritzius)
- Subject: Re: Nuclear Waste Disposal
- Message-ID: <rsf1.725506659@Ra.MsState.Edu>
- Keywords: Accelerator Transmutation of Waste
- Sender: news@ra.msstate.edu
- Nntp-Posting-Host: ra.msstate.edu
- Organization: Mississippi State University
- Date: Mon, 28 Dec 1992 01:37:39 GMT
- Lines: 71
-
- In (rsf1.723799992@Ra.MsState.Edu) I asked:
-
- >Should there not be some way to bombard radioactive nuclear waste with
- >sufficient quantities of high energy electrons, nuclei, or gamma rays so
- >as to ignite a controllable exothermic "fission-fire" which reduces the
- >waste material to mostly non-radioactive lighter elements while
- >simultaneously supplying a thermal source for electrical power generation?
-
- [stuff deleted]
-
- One e-mail responder, who may prefer to remain anonymous, wrote:
-
- [This is slightly changed from the original response.]
-
- >There are indeed some people thinking about that - there was an article
- >in Nuclear Instruments and Methods some time ago, but I don't have
- >the reference handy .
-
- >They call it ATW - Accelerator driven Transmutation of nuclear Waste .
-
- [stuff deleted]
-
- >You have to build a high-current proton accelerator , fire at a target to
- >produce a high current of neutrons and put the nuclear waste in the neutron
- >stream. If the neutron flux is high enough, you can convert all long-lived
- >isotopes (Plutoninun,... ) to short-lived ones, and if you add a lot of
- >chemistry and a power-plant, you can get the energy to drive the
- >accelerator from the fission-process and still have some energy left.
-
- >Advanteges:
-
- >1) Small amount of fuel (subcritical i.e. can't explode) - Can't get out
- > of control: In case of a problem, just shut down the accelerator.
- >2) You can use a lot of isotopes as fuel, much more than in an
- > nuclear reactor.
-
- >Problems (just a few , there are more ... ) :
-
- >1) You need a really high beam current ( some Amp's )
- >2) You have to build a target that can stand the beam power
- >3) You have to build a large chemical plant to remove the 'burned' Isotopes
- > and fill in new ones ( the fuel is circulated in molten salt ... )
- >..... much more ....
-
- This responder stressed the idea of a high neutron flux density as being a
- central feature in the process.
-
- Another responder, on this news group, intimated that the energy extraction
- process would *not* be able to power the whole setup.
-
- Any further comments on these two issues?
-
- The impetus behind my original posting (although not stated in the post) was
- the idea of somehow producing a gamma-rich environment to tickle neutrons
- to death and let what follows follow. The proton beam, if that's what
- we use, would be the "igniter" for this process.
-
- How about some insights or speculations on the gamma-induced neutron-decay
- issue and especially on whether it is possible for that process to ever go
- critical. Don't want to burn up the world, but then that *would* solve the
- nuclear waste problem.
-
- My apology for that "textbook" and "endothermic" raciblesse(*).
-
-
- Robert S.Fritzius rsf1@ra.msstate.edu
-
- (*) That's a new word for bull dung.
-
-
-
-