Iodine Bioassay: NUREG/CR-4884

[Ccja@aol.com]

Most people, I believe, monitor for occupational internal dose commitments,
by the iodines, by in vivo bioassay, i.e., gamma counting of the thyroid.
This Nureg only gives the IRF's for the stable I-127, in the thyroid, for the
ingestional mode of intake. This is an unfortunate oversight, in a generally
very useful document. Since the CDE's are significantly different for
inhalation (~40% less), if one were to use this document to compute them, one
would have to correct, for decay, the values given for the IRF's for one of
the radioiodines (I-131 being the easiest). Otherwise, another source of
error is introduced into an already dicey situation.