[ RadSafe ] Health Canada's Radiation Monitoring Data
Thomas Johnston
tjohnstn at gmail.com
Wed Jul 6 15:27:58 CDT 2011
Hello Neil,
Good to hear from you.
Thomas
NIST
On Tue, Jul 5, 2011 at 1:42 PM, nmbarss at fred.net <nmbarss at fred.net> wrote:
> Hi Cat...thanx for the info also.... BODY { font-family:Arial,
> Helvetica, sans-serif;font-size:12px; }
> On Wed 06/29/11 5:20 PM , Catalina Kovats kovatsc at georgetown.edu
> sent:
> Matt:
> The Rad-Net data was posted on EPA website at
> http://www.epa.gov/japan2011/data-updates.html [1]
> Catalina
> --
> Catalina E. Kovats, M.S.
> Radiation Safety Officer
> Georgetown University EH&S
> LM-12 Preclinical Science Building
> 3900 Reservoir Road, N.W.
> Washington, DC 20057-1431
> Phone (202) 687-4712
> Fax (202) 687-5046
> On 6/29/2011 2:37 PM, Matt sargent wrote:
> > FYI
> >
> > The link to Health Canada's Radiation Monitoring Data
> >
> > This is the link the CNSC supplied to monitor Radiation in Canada
> and its
> > territories.
> >
> > That was mentioned in the original email below.
> >
> >
> http://www.hc-sc.gc.ca/hc-ps/ed-ud/respond/nuclea/data-donnees-eng.php#ddrl
> [2]_
> > mar2011
> >
> >
> > I have tried to ask for the NRC comparison but have been given no
> address
> > for any such location or information.
> >
> >
> > Matt Sargent
> >
> > -----Original Message-----
> > From: Conklin, Al (DOH) [Al.Conklin at DOH.WA.GOV [3]]
> > Sent: June 29, 2011 11:59 AM
> > To: The International Radiation Protection (Health Physics)
> MailingList
> > Subject: Re: [ RadSafe ] Fukushima Hot Particles
> >
> > A very nice concise summary. Thanks.
> >
> > Al Conklin
> > Lead Trainer and Health Physicist
> > Radiological Emergency Preparedness Section
> > Office of Radiation Protection
> > Department of Health
> > office: 360-236-3261
> > cell: 360-239-1237
> >
> > -----Original Message-----
> > From: radsafe-bounces at health.phys.iit.edu [4]
> > [radsafe-bounces at health.phys.iit.edu [5]] On Behalf Of Matt sargent
> > Sent: Wednesday, June 29, 2011 9:24 AM
> > To: 'The International Radiation Protection (Health Physics)
> Mailing List'
> > Subject: Re: [ RadSafe ] Fukushima Hot Particles
> >
> > Thought I Would share this email I have received regarding
> questions to my
> > regulatory authority, regarding the hot particles.
> >
> > Thanks
> >
> >
> > Kindly,
> > Matt Sargent
> > Safety / Compliance Officer
> > matt at buffaloinspection.com [6]
> > Office # 780-486-7344
> > Fax # 780-486-4685
> > www.buffaloinspection.com [7]
> >
> >
> >
> >
>
> ----------------------------------------------------------------------------
> > -
> >
> > Matt: here's from one of our specialists.
> >
> > Good Afternoon,
> >
> > You had raised some questions about hot particles and their
> association with
> > the Fukushima events. NCRP Report No. 130- Biological Effects and
> Exposure
> > Limits for Hot Particles- is a good source of reference information
> about
> > hot particles, including their detection.
> >
> > Hot particles have typically been associated with nuclear reactors
> and
> > weapons testing and are usually beta emitting or gamma/beta
> emitting
> > radionuclides, commonly Co-60 and other fission fragments. NCRP
> report No.
> > 130 defines hot particles as being greater than 10 microns and less
> than
> > 3000 microns. Hot particles are loosely defined as "high activity"
> > particles. They are often electrically charged and are water
> insoluble. Hot
> > particles are typically found on the skin, and therefore much
> attention has
> > been given to the effects on the skin and on the skin dosimetry
> related to
> > hot particles.
> >
> > Hot particles have been observed in association with the Chernobyl
> > accident. The associated long distance transit with the large fire
> and
> > explosions essentially caused a ballistic launch through the upper
> > troposphere; not the usual mechanism of long range transit.
> >
> > Fukushima's primary containment was largely left intact; the
> releases were
> > very different than with Chernobyl as they were mainly volatile in
> nature.
> >
> > It is unlikely that hot particles will be observed as a result of
> Fukushima
> > especially in North America. However, in the coming months and
> years ahead,
> > much work will be done in relation to Fukushima at which time more
> > information will be available.
> >
> > Health Canada's network has observed volatile materials like
> Cesium, iodine
> > etc. at stations outside of Japan and nothing that has looked like
> a piece
> > of refractory material. In a few months, Health Canada may do some
> > autoradiograghy on some Canadian filters to look at activity
> distribution of
> > longer lived materials.
> >
> > The reports which were linked in your e-mail (Fairwinds) make
> several claims
> > of hot particles being breathed in every day and makes specific
> claims of 5
> > hot particles/day being "breathed in" in Seattle. We have not found
> any
> > credible information which supports this claim.
> >
> > It is notable that in NCRP Report No. 130 it is stated that there
> have been
> > no reported clinically observable human injuries due to hot
> particle
> > exposures in the workplace.
> >
> > I Hope this helps.
> >
> > Melanie
> >
> >
> > Regards,
> > Melanie Rickard
> > CNSC-CCSN
> > External Dosimetry Specialist
> > 613-996-7323
> >
> >
> >
> > ________________________________________
> > From: Matt Sargent [Matt at buffaloinspection.com [8]]
> > Sent: Wednesday, June 22, 2011 12:54 PM
> > To: Drolet, Marc
> > Subject: Thanks
> > Marc
> >
> > Thanks for the link, I appreciate the fast response. So is there an
> > accurate way to count the hot particles? For example you have Arnie
> > Gundersen and others talking about the amount of particles being
> inhaled in
> > Japan Fukushima around 11 a day and Seattle around 5 a day. Is this
> > accurate? Even though very little radiation is being detected what
> is the
> > possibility that it is being created by hot particles? It's a very
> > different situation if you are breathing the particles in rather
> than just
> > absorbing the radiation/energy through the skin. As I am sure you
> are
> > aware. I am just trying to understand the situation there is some
> many
> > different explanations and opinions on it.
> >
> > Dose the Nuclear Regulatory Commission of the USA have a similar
> setup for
> > monitoring radiation readings? I understand that the jet stream has
> > sheltered us for the most part while the majority has gone down to
> our
> > southern neighbors. I have talked to associates that claim at times
> > upward of 30 x normal background. Is there any where that you know
> of to
> > monitor the readings in the USA?
> >
> > Thanks for your time.
> >
> > Matt Sargent
> >
> > Kindly,
> > Matt Sargent
> > Safety Compliance Officer
> > matt at buffaloinspection.com [9]
> > Office # 780-486-7344
> > Fax # 780-486-4685
> > www.buffaloinspection.com [10]
> >
> >
> >
> > *** NOTE ***
> > The CNSC email security server scanned this email and found no
> potentially
> > hostile
> > or malicious content. To be safe, do not open attachments from
> unrecognized
> > senders.
> >
> > *** REMARQUE ****
> > ordinateur,
> >
> >
> >
>
> ****************************************************************************
> > ***********************
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> use of
> > the named
> > addressee. Access, copying, or re-use of the e-mail or any
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> > therein by any other person is not authorized. If you are not the
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> > recipient,
> > please notify us immediately by returning the e-mail to the
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> >
> > partielle de
> > message
> > retournant ce
> >
>
> ****************************************************************************
> > ***********************
> >
> > -----Original Message-----
> > From: Peter Bossew [Peter.Bossew at reflex.at [11]]
> > Sent: June 28, 2011 2:06 PM
> > To: radsafe at health.phys.iit.edu [12]
> > Subject: [ RadSafe ] Fukushima Hot Particles
> >
> > Colleagues:
> >
> > Only now I noticed the 'hot particles' thread. I apologize if I
> missed
> > something, and if I am repeating arguments.
> >
> > The only evidence for hot particles is
> >
> > (1) an autoradiography of an airfilter;
> > (2) an electron microscope picture of an isolated particle.
> > (3) XRF scan of the particle.
> > (4) gamma and alpha spcs of the bare HP. Also easily done (I did it
> with
> > Chernobyl HPs.) The r.n. composition is very different from the
> continuous
> > phase on the filter.
> >
> > This is all done quite easily by standard techniques.
> >
> > Does anybody know about such findings? Please let me know any
> reference.
> > (I haven't seen any.)
> >
> > A gamma spectrum of an air filter is no evidence. A NaI spectrum is
> just
> > ridiculous for this purpose.
> > The argument that Rn progenies attached to aerosols can appear as
> HPs is
> > wrong. After a few hours 214Pb,Bi have decayed. 210Pb,Po are
> usually not
> > present in enough activity, same for Tn. Btw. it can easily be
> checked by
> > investigating BG filters, and if such suspected particle is found,
> perform
> > g& a-spc on the isolated particle. Rn and Tn progenies are very
> easy to
> > identify (should be a triviality in this forum.)
> >
> >
> > Generally speaking, the release conditions were such that there is
> a
> > chance of HPs. Therefore experimental evidence would be valuable
> > contribution to understanding the accident.
> >
> >
> > Thx.
> >
> > Peter Bossew
> >
> >
> > (German Federal Radioprotection Authority, Berlin)
> >
> >
> > _______________________________________________
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> Links:
> ------
> [1] http://www.epa.gov/japan2011/data-updates.html
> [2]
>
> https://webmail.xecu.net/parse.php?redirect=http%3A%2F%2Fwww.hc-sc.gc.ca%2Fhc-ps%2Fed-ud%2Frespond%2Fnuclea%2Fdata-donnees-eng.php%23ddrl
> [3] mailto:Al.Conklin at DOH.WA.GOV
> [4] mailto:radsafe-bounces at health.phys.iit.edu
> [5] mailto:radsafe-bounces at health.phys.iit.edu
> [6] mailto:matt at buffaloinspection.com
> [7]
>
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> [8] mailto:Matt at buffaloinspection.com
> [9] mailto:matt at buffaloinspection.com
> [10]
>
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> [11] mailto:Peter.Bossew at reflex.at
> [12] mailto:radsafe at health.phys.iit.edu
> [13]
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