I-131 Volatility Ratio

["Aro, Jon" <jaro@ottawahospital.on.ca>]

Hi All, 



I am looking for the volatility ratio of I-131, essentially the amount

of airborne activity one would expect from a known activity of I-131.

I am trying to estimate the exposure an individual would receive as a

result of radioactive materials being vented through a fume hood.  The

only isotope that we use where airborne contamination is of concern is

I-131, as it can be volatile.  After searching Google & hps.org I have

found nothing.  The "ask the expert" section mentioned that there is no

"one-size-fits-all" approach to this problem. 



Has anyone come across this problem before?   What ratios did you

find/come up with?



Thanks in advance,



Jon Aro

Ottawa Hospital



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