[ RadSafe ] -life nonsense
franz.schoenhofer at chello.at
franz.schoenhofer at chello.at
Mon Jul 16 13:55:26 CDT 2012
Hi Mike ,Do you really think that you will really convert any of these "anti-nuclears" to reasonable thinking? My younger son gave me
decades (?) ago a mat with the motto "Don't disturb me with facts, I've made up my mind". Isn't that still true? Why bother about giga- and tera-Bq of K-40, if mu-Bq of Cs-137 per km3 of water threaten the suvival of the human race?
Best regards,
Franz
---- "Brennan schrieb:
> Hi, John.
>
> k-40 is my favorite isotope. What's not to like about an isotope that
> sometimes emits a positron? (Antimatter! It's not just for Star Trek
> anymore!) I also like it because it so confounds the anti-nukes, when
> you can get them to pay attention to it. It can be fun to watch them
> try to figure out why a vanishingly small level of the isotope they are
> up in arms about matters, when orders of magnitude more K-40 doesn't.
>
> -----Original Message-----
> From: radsafe-bounces at health.phys.iit.edu
> [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of John R Johnson
> Sent: Monday, July 16, 2012 10:08 AM
> To: The International Radiation Protection (Health Physics) Mailing List
> Subject: Re: [ RadSafe ] Half-life nonsense
>
> Mike
>
> I've worked in both fields also. Potassium is an element necessary for
> life
> (e the medical field) and it all contains
> K-40 (half life 1.25 x 10(to the 4) years.
>
> John
>
>
>
> On Mon, Jul 16, 2012 at 9:29 AM, Brennan, Mike (DOH) <
> Mike.Brennan at doh.wa.gov> wrote:
>
> > I deal (mostly) with environmental rad, but I also talk with people
> who
> > use rad in the medical field. For the medical folks, "long half-life"
> is
> > anything more than about 100 days. For me, Long half-life is when it
> is
> > more convenient to write it in scientific notation.
> >
> > -----Original Message-----
> > From: radsafe-bounces at health.phys.iit.edu [mailto:
> > radsafe-bounces at health.phys.iit.edu] On Behalf Of Jerry Cohen
> > Sent: Saturday, July 14, 2012 1:09 PM
> > To: The International Radiation Protection (Health Physics) Mailing
> List
> > Subject: Re: [ RadSafe ] Half-life nonsense
> >
> > Lets see if I understand this correcly---If it is man-made, it is bad
> (ie.
> > hazardous)
> > but naturally occuring is OK. Right???
> > By that standard, aspirin is a poison, and hemlock is OK
> >
> > At the HPS meeting in 1980, I gave a paper intended to address the
> > longevity
> > nonsense by proposing a change in definition. We proposed that:
> >
> > Radionuclides with a half-life less than one million years be
> considered
> > radioactive,
> >
> > Radionuclides with a half-lifes between one million and one trillion
> years
> > are
> > radiopassive,and
> >
> > Those with half lives greater than a trillion years (eg. I-129) are
> > radioquiescent (ie. stable elements)
> >
> > Somehow, the idea never caught on.
> >
> >
> >
> >
> >
> > ________________________________
> > From: John R Johnson <idiasjrj at gmail.com>
> > To: Jerry Cohen <jjcohen at prodigy.net>; The International Radiation
> > Protection
> > (Health Physics) Mailing List <radsafe at health.phys.iit.edu>
> > Sent: Fri, July 13, 2012 4:22:42 PM
> > Subject: Re: [ RadSafe ] Texas LLRW Site
> >
> > Jerry
> >
> > Isn't it because it does not occur in "nature". If I-129 is present it
> must
> > be "man made" and likely an indication of other isotopes being made.
> > John
> > On Fri, Jul 13, 2012 at 3:38 PM, Jerry Cohen <jjc105 at yahoo.com> wrote:
> >
> > >
> > >
> > > I wonder what makes I-129 a "radionuclide of interest". Its
> exceedingly
> > > long
> > > half-life makes it essentially a stable element, no different than
> the
> > > stable
> > > iodine that occurs naturally in most soils.
> > >
> > > Jerry Cohen
> > >
> > >
> > > Dear Radsafe,
> > >
> > > From: _jpreisig at aol.com_ (mailto:jpreisig at aol.com) .
> > >
> > >
> > > Hope you are all doing well. HP abstracts for the HP Society
> > > Meeting in Sacramento,
> > > California are out now, as a supplement to Health Physics magazine.
> > > Always interesting
> > > reading. One item is on DU by Bob Cherry.
> > >
> > > Operational Radiation Safety (another HPS journal) has an
> article on
> > > Decommissioning of the
> > > Brookhaven Lab High Flux Beam reactor. Fuel and spent fuel are
> gone.
> > > Heavy Water is gone.
> > > Interesting reading. I guess that's one way of totally stopping
> the
> > > tritium leak source term.
> > > The offending leaking fuel storage pool was drained. Goodbye.
> Wonder
> > > what they'll do with the
> > > Brookhaven Medical Research Reactor. I don't think there was
> anything
> > > wrong with it..
> > >
> > > There's an abstract on the new Texas LLRW (Low Level Radioactive
> > > Waste) facility and some
> > > modeling they did. The radionuclides of interest are C-14, Tc-99,
> > I-129,
> > > possibly among others.
> > > I guess tritium is not that big a deal in such a facility, due to
> its
> > short
> > > half-life. These radionuclides
> > > are particularly mobile in the groundwater environment, as referred
> to in
> > > my earlier RADSAFE
> > > postings. These Texas folks did some computer modelling and
> describe
> > what
> > > they did. Wonder why
> > > they didn't just use Femwater-BLT (Suen and Sullivan???), Lewater,
> > Lewaste
> > > or similar computer
> > > codes. Last I heard, Femwater-BLT was available for use on a
> personal
> > > computer. It is or was
> > > available for a fee from the RSICC, the Radiation Shielding
> Information
> > > Center at Oak Ridge
> > > National Laboratory (USA). Other Radiation computer codes are
> > available.
> > > Finally, if you see a computer
> > > code you are interested in, you can search it out on the internet,
> and
> > then
> > > email the original
> > > programmers/designers for information on how to obtain such a
> computer
> > > code. No big deal.
> > >
> > > These newfangled small, modular reactors are also addressed in
> an
> > > abstract. Sounds like
> > > some of them will be deployed by the TVA, in the Tennessee Valley.
> > > Newfangled nuclear
> > > electricity for people/homes/businesses previously not on the
> electricity
> > > grid.
> > >
> > > NJ Nuke plants and workers, thanks for the 50% of the
> electricity (in
> > > NJ) that you are providing to
> > > air condition part of my home this summer!!!! Take Care...
> > >
> > > Regards, Joseph R. (Joe) Preisig, PhD
> > >
> > >
> > >
> > >
> > >
> > >
> > > _______________________________________________
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> > >
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> understood
> > the
> > > RadSafe rules. These can be found at:
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> > >
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> settings
> > > visit:
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> > >
> > >
> > > ________________________________
> > >
> > > From: "JPreisig at aol.com" <JPreisig at aol.com>
> > > To: radsafe at health.phys.iit.edu
> > > Sent: Thu, July 12, 2012 8:44:56 PM
> > > Subject: [ RadSafe ] Texas LLRW Site
> > > _______________________________________________
> > > You are currently subscribed to the RadSafe mailing list
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> > >
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--
Franz Schoenhofer, PhD, MinRat
Habicherg. 31/7
A-1160 Vienna
Austria
mobile: ++43 699 1706 1227
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