Hanford Environmental Dose Reconstruction Project validation studies using predicted activity concentrations of 131I on sagebrush showed a systematic underestimation against historical data during cold weather months, indicating a need for sagebrush model improvement. A deposition model for semi-volatile organic materials, including a temperature-dependent term based on an integrated van't Hoff equation, was adapted for gaseous iodine onto sagebrush. Calibration data for the model are obtained from a release of 131I in 1963. Modeling results for releases in 1946 show a good match between historical data and predicted results using the new model.
Revised: March 28, 2002 |
Published: March 1, 2001
Citation
Napier B.A., P.W. Eslinger, W.E. Nichols, and L. Anderlini. 2001.Improvements in Modeling Sagebrush Concentrations of Radioiodine Released from the Hanford Site.Journal of Environmental Radioactivity 54, no. 3:377-389.PNNL-SA-33571.