Abstract:
:Emissions of (129)I from nuclear fuel separations conducted at the Hanford Site in Washington State have been occurring since the 1940's. Fuel separation on the Hanford Site stopped in 1988, but emissions of (129)I have continued as venting of the PUREX Plant occurred. In this study, atmospheric measurements of (129)I concentrations were coupled with an EPA approved plume dispersion model (CAP88-PC, Version 3.0) to evaluate the effectiveness of the dispersion model for estimating ambient concentrations at the Hanford Site. This evaluation led to the hypothesis that different chemical forms of iodine were being emitted over the years; this hypothesis was developed as an explanation for the model agreeing with measurements over some time periods, but not over all time periods. The model was then run with modified emissions to simulate the short atmospheric half-life of the suspected reactive chemical form of iodine being emitted. This modification resulted in good agreement between the modeled and measured concentrations over the entire 20 year study period (1986-2005), and provided evidence supporting the hypothesis of a reactive form of iodine being emitted.
journal_name
J Environ Radioactjournal_title
Journal of environmental radioactivityauthors
Fritz BG,Phillips NRdoi
10.1016/j.jenvrad.2013.01.015subject
Has Abstractpub_date
2013-06-01 00:00:00pages
1-5eissn
0265-931Xissn
1879-1700pii
S0265-931X(13)00024-6journal_volume
120pub_type
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