TMI DOSE ASSIGNMENT

[EPIRAD@aol.com]

Most of the follow-up epidemiologic studies performed around TMI have used 
the dose assessment by Gur et al. (Proceedings of the PA Academy of Science 
57:99-102, 1983) as the "gold" standard for exposure assignment for 
individuals in areas within 5 miles of TMI.  Gur et al. estimates that the 
average likely and average maximum possible gamma doses are 9 and 25 mrems, 
respectively.  Gur's dose estimates deal only with "whole body gamma dose" 
from inert gases and not with thyroid dose due to inhalation and/or ingestion 
of radioiodine. 

The counties surrounding TMI have some of the highest regional radon 
concentrations in the nation.  If Gur's dose estimates are correct, how can 
epidemiologic studies be performed without adjusting for radon?  It likely 
represents the greatest radiation dose to the average individual around TMI.

Do most people think Gur's exposure assessment method is the best that can be 
achieved?

Has anyone attempted to update these dose estimates since 1983?

Bill Field
bill-field@uiowa.edu
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