[ RadSafe ] Iodine Chemistry of nuclear reactorsinemergencycases

[Bob Hearn]

Maybe 7.5 g, but still a lot of salt. Of course there is kelp/seaweed as a
significant iodine-bearing component in the Japanese diet.

----- Original Message ----- 
From: <StevenFrey at aol.com>
To: <radsafe at health.phys.iit.edu>
Sent: Wednesday, March 23, 2011 9:20 PM
Subject: Re: [ RadSafe ] Iodine Chemistry of nuclear
reactorsinemergencycases



Thanks, Rich! Assuming also that

1) iodized salt contains 20 mg of iodine/kg NaCl (per Reference  #1 below),

2) the adult male needs 150 ug/day of iodine (per Reference #2  below),

3) a daily adult intake of 150 ug of iodine saturates the thyroid with
iodine (implied in Reference #2, but not definitively so stated  there)

Then a modest calculation would give us the necessary mass of iodized
table salt per day to saturate the thyroid as such:

Intake mass per day = (150 ug/day) / (20 mg/kg)  (apply  appropriate
ug-mg-kg unit conversion factors)

Intake Mass per day = 750 grams  => 1.5 pounds of salt per  day

This rough calculation yields a result very close to the "several pounds of
 salt per day" that you mentioned in your below email.

The key takeaway would seem to be that using iodized table salt to achieve,
 let alone maintain, effective iodine-prophylaxis of the  thyroid would
invoke serious chemical toxicity risks of its own.

Steve

References
1. _https://secure.wikimedia.org/wikipedia/en/wiki/Iodized_salt_
(https://secure.wikimedia.org/wikipedia/en/wiki/Iodized_salt)

2. _https://secure.wikimedia.org/wikipedia/en/wiki/Iodine#Dietary_intake_
(https://secure.wikimedia.org/wikipedia/en/wiki/Iodine#Dietary_intake)
========================================================================


In a message dated 3/23/2011 7:53:17 P.M. Eastern Daylight Time,
rich at tgainc.com writes:

1 tsp of  iodized salt contains 400 ug of iodine. The CDC recommends a daily
dosage  for adults, of 130 mg (one 130 mg tablet OR two 65 mg tablets OR two
mL of  solution) to protect against radiation exposure.



-----Original  Message-----
From:  radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu]  On Behalf Of Franz Schönhofer
Sent: Wednesday, March 23, 2011 4:41  PM
To: 'The International Radiation Protection (Health Physics)  MailingList'
Subject: Re: [ RadSafe ] Iodine Chemistry of  nuclear
reactorsinemergencycases

Your ask, how much one can trust  media???????

What a question!

Franz Schoenhofer, PhD
MinRat  i.R.
Habicherg. 31/7
A-1160  Wien/Vienna
AUSTRIA


-----Ursprüngliche Nachricht-----
Von:  radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu]  Im Auftrag von Richard Gallego
Gesendet: Donnerstag, 24. März 2011  00:17
An: 'The International Radiation Protection (Health Physics)  MailingList'
Betreff: Re: [ RadSafe ] Iodine Chemistry of  nuclear
reactorsinemergencycases

I read last week online that it  would take several pounds of salt per day.
I'm not sure how much you can  trust media for accuracy, however.

-----Original Message-----
From:  radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu]  On Behalf Of
StevenFrey at aol.com
Sent: Wednesday, March 23, 2011 4:22  PM
To: radsafe at health.phys.iit.edu
Subject: Re: [ RadSafe ] Iodine  Chemistry of nuclear reactors
inemergencycases

Friends,

What  mass of iodized salt would one have to ingest a day to completely
block
the  thyroid with non-radioactive iodine and then maintain 100%  blockage?
(assuming everyone's metabolism and uptake mechanisms are   identical...)

Thanks,
Steve
Steven R. Frey, MS,  CHP
South  Williamsport, PA  17702-7024
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