[ RadSafe ] observations on iodized salt

[radbloom at comcast.net]

John, 



I should have added that I was the dosages were for the I-131 isotope.  Now it's time for me to look at the reference John Johnson added.  



Thank you for the opportunity. 



Cindy Bloom 


----- 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 11:24:34 AM 
Subject: Re: [ RadSafe ] observations on iodized salt 

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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