[ RadSafe ] observations on iodized salt

[John Gerald Center, Jr]

Yes, thank you Cindy. The word that was escaping my thought process-- metabolic.  John

John G. Center, Jr.
Radiation Safety Officer
3922 Wood Hall
Western Michigan University
1903 W. Michigan Ave.
Kalamazoo, MI  49008-5410

Office (269) 387-5933
Cell  (269) 744-0996
E-mail: john.center at wmich.edu

----- Original Message -----
> From: radbloom at comcast.net
> To: "The International Radiation Protection (Health Physics) Mailing List" <radsafe at agni.phys.iit.edu>
> Sent: Thursday, March 24, 2011 11:14:35 AM
> Subject: Re: [ RadSafe ] observations on iodized salt
> John,
> 
> I'm also still not sure what you are asking. :-) In regards to the
> iodine in iodized table salt or salt substitute, there is no
> radioactive iodine in these substances. If you are asking about
> radioactive iodine in air/food/water, then you can look at the ICRP
> models. Industry typically uses ICRP Publication 30, which have been
> updated in Publications 60-72 (depending on what exactly you are
> looking for). I believe there are more recent updates, but I'm not
> sure if these provide any significant change to the iodine metabolic
> modeling.
> 
> 
> 
> In considering radioiodine damage to the thyroid, I personally think
> about radiation therapy, where the goal is to reduce [over-active]
> thyroid function (an [acute] oral intake of about 10 millicuries [3.7
> e7 Bq]) or to destroy cancer in thyroid tissue, which also stops
> thyroid function (an [acute] oral intake of about 100 mCi [3.7 e8
> Bq]). In ICRP 30, it is assumed that 30% of the iodine is absorbed by
> thyroid tissue and the rest is excreted. In these large dosages, there
> is sufficient energy absorption within a sufficient number of thyroid
> cells to cause dysfunction of the organ.
> 
> 
> 
> Still not sure if this is what you are looking for. You might do a
> search on "iodine metabolism". You can also look at ALIs and DACs
> published by the EPA and NRC.
> 
> 
> 
> Cindy
> ----- Original Message -----
> From: "John Gerald Center, Jr" <john.center at wmich.edu>
> To: "The International Radiation Protection (Health Physics) Mailing
> List" <radsafe at agni.phys.iit.edu>
> Sent: Thursday, March 24, 2011 10:27:13 AM
> Subject: Re: [ RadSafe ] observations on iodized salt
> 
> I think I didn't start out right.  And I am still not sure what I am
> asking. I and many others voluntarily take in radioactive food
> sources.  Beta and gamma emmiters with greater half lives than Iodine.
>  The concern is the thyroid with iodine if I am not mistaken. Does
> anyone have a resource I can look to,to see specifically how Iodine is
> absorbed and the damage it does?  John
> 
> John G. Center, Jr.
> Radiation Safety Officer
> 3922 Wood Hall
> Western Michigan University
> 1903 W. Michigan Ave.
> Kalamazoo, MI  49008-5410
> 
> Office (269) 387-5933
> Cell  (269) 744-0996
> E-mail: john.center at wmich.edu
> 
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