[ RadSafe ] Cohen's radon results and LNT

Tue Oct 4 07:37:18 CDT 2011

Very interesting post - Chris Busby like.

Franz

---- "Busby schrieb:
> Sorry
> C
> 
> 
> -----Original Message-----
> From: radsafe-bounces at agni.phys.iit.edu on behalf of Brennan, Mike  (DOH)
> Sent: Mon 03/10/2011 18:32
> To: The International Radiation Protection (Health Physics) MailingList
> Subject: Re: [ RadSafe ] Cohen's radon results and LNT
>  
> I was actually addressing Chris Hofmeyr.
> 
> -----Original Message-----
> From: radsafe-bounces at health.phys.iit.edu
> [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Busby, Chris
> Sent: Saturday, October 01, 2011 6:16 AM
> To: The International Radiation Protection (Health Physics) Mailing List
> Subject: Re: [ RadSafe ] Cohen's radon results and LNT
> 
> Its some time since I looked at this but I recall that the problem was
> that no one has looked at weapons fallout and rainfall.
> C
> 
> 
> -----Original Message-----
> From: radsafe-bounces at agni.phys.iit.edu on behalf of Brennan, Mike
> (DOH)
> Sent: Fri 30/09/2011 18:43
> To: The International Radiation Protection (Health Physics) MailingList
> Subject: Re: [ RadSafe ] Cohen's radon results and LNT
>  
> Hi, Chris.  
> 
> I would be interested on your take on the Iowa Radon Lung Cancer Study,
> which to me seems to have better power because it controlled for more
> confounding factors.  http://radsci1.home.mchsi.com/irlcs.pdf
> 
> 
> -----Original Message-----
> From: radsafe-bounces at health.phys.iit.edu
> [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Chris Hofmeyr
> Sent: Thursday, September 29, 2011 9:03 AM
> To: Otto G. Raabe; Bernard L. Cohen
> Cc: radsafe at agni.phys.iit.edu; WesVanPelt at verizon.net
> Subject: Re: [ RadSafe ] Cohen's radon results and LNT
> 
> Prof Raabe,
> Your most recent Radsafe posting is appreciated as implying that my
> understanding of Cohen's radon data does not conflict with your
> proposals concerning cancer induction by protracted exposures, as
> explained in your well-considered 2011 paper.
> 
> I am thinking aloud about the alpha equal 2 beta effect. It is fairly
> trivial to calculate that a whole-body short-term lethal dose of a
> couple of Gray actually only affects one atom in a million. Of course, a
> DNA strand contains millions of atoms, but a double strand break cannot
> happen very far separated, or it would be classed as two single strand
> breaks.  The alpha would tend to break both strands close together, but
> how is that envisaged for two
> (uncorrelated?) betas, as the beta-active nuclei are presumably
> spatially well separated. Consecutive beta-decays are usually well
> separated in time, but a beta is often almost instantaneously followed
> by a gamma.
> Some clarification would be appreciated.  
> 
> Sincerely
> chris.hofmeyr at webmail.co.za
> 
> 
> On Wed, 28 Sep 2011 12:00:14 -0700 "Otto G. Raabe" <ograabe at ucdavis.edu>
> wrote
> 
> > At 09:40 AM 9/28/2011, Chris Hofmeyr wrote:
> > >Prof Cohen, Radsafers,
> > >In the condensed notes on Cohen's radon studies (attached to posting 
> > >on Radsafe
> > >21 Sept), I attempt to show unequivocally, although slightly
> > unconventionally,
> > >that Cohen's lung cancer (LC) mortality rates are basically
> independent of
> > the
> > >average domestic radon concentrations as determined by Cohen on a per
> county
> > >basis. This independence clearly means that LNT is REJECTED, since
> lung
> > cancer
> > >is not perceptibly correlated with domestic radon...
> > *****************
> > My Forum paper,  "Toward Improved Ionizing Radiation Safety 
> > Standards", Health Phys. 101:84-93;2011, explains why LNT does not 
> > apply to any protracted or repeated radiation exposures.
> > 
> > Otto
> > 
> > 
> > **********************************************
> > Prof. Otto G. Raabe, Ph.D., CHP
> > Center for Health & the Environment
> > University of California
> > One Shields Avenue
> > Davis, CA 95616
> > E-Mail: ograabe at ucdavis.edu
> > Phone: (530) 752-7754   FAX: (530) 758-6140
> > ***********************************************
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> 
> 
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