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Title: Reassessment of Resuspension Factor Following Radionuclide Dispersal: Toward a General-purpose Rate Constant

A recent analysis of historical radionuclide resuspension datasets confirmed the general applicability of the Anspaugh and modified Anspaugh models of resuspension factors following both controlled and disastrous releases. While observations appear to have larger variance earlier in time, previous studies equally weighted the data for statistical fit calculations; this could induce a positive skewing of resuspension coefficients in the early time-period. A refitting is performed using a relative instrumental weighting of the observations. Measurements within a 3-d window are grouped into singular sample sets to construct standard deviations. The resulting best-fit equations produce tamer exponentials, which give decreased integrated resuspension factor values relative to those reported by Anspaugh. As expected, the fits attenuate greater error among the data at earlier time. In conclusion, the reevaluation provides a sharper contrast between the empirical models and reaffirms their deficiencies in the short-lived timeframe wherein the dynamics of particulate dispersion dominate the resuspension process.
Authors:
 [1] ;  [2] ;  [1]
  1. Worcester Polytechnic Inst., Worcester, MA (United States). Dept. of Physics
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Report Number(s):
SAND-2017-6806J
Journal ID: ISSN 0017-9078; 654860
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Health Physics
Additional Journal Information:
Journal Volume: 114; Journal Issue: 5; Journal ID: ISSN 0017-9078
Publisher:
Health Physics Society
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; contamination; environmental; dosimetry; internal; inhalation; radioactivity; airborne
OSTI Identifier:
1464183

Marshall, Shaun, Potter, Charles, and Medich, David. Reassessment of Resuspension Factor Following Radionuclide Dispersal: Toward a General-purpose Rate Constant. United States: N. p., Web. doi:10.1097/HP.0000000000000802.
Marshall, Shaun, Potter, Charles, & Medich, David. Reassessment of Resuspension Factor Following Radionuclide Dispersal: Toward a General-purpose Rate Constant. United States. doi:10.1097/HP.0000000000000802.
Marshall, Shaun, Potter, Charles, and Medich, David. 2018. "Reassessment of Resuspension Factor Following Radionuclide Dispersal: Toward a General-purpose Rate Constant". United States. doi:10.1097/HP.0000000000000802. https://www.osti.gov/servlets/purl/1464183.
@article{osti_1464183,
title = {Reassessment of Resuspension Factor Following Radionuclide Dispersal: Toward a General-purpose Rate Constant},
author = {Marshall, Shaun and Potter, Charles and Medich, David},
abstractNote = {A recent analysis of historical radionuclide resuspension datasets confirmed the general applicability of the Anspaugh and modified Anspaugh models of resuspension factors following both controlled and disastrous releases. While observations appear to have larger variance earlier in time, previous studies equally weighted the data for statistical fit calculations; this could induce a positive skewing of resuspension coefficients in the early time-period. A refitting is performed using a relative instrumental weighting of the observations. Measurements within a 3-d window are grouped into singular sample sets to construct standard deviations. The resulting best-fit equations produce tamer exponentials, which give decreased integrated resuspension factor values relative to those reported by Anspaugh. As expected, the fits attenuate greater error among the data at earlier time. In conclusion, the reevaluation provides a sharper contrast between the empirical models and reaffirms their deficiencies in the short-lived timeframe wherein the dynamics of particulate dispersion dominate the resuspension process.},
doi = {10.1097/HP.0000000000000802},
journal = {Health Physics},
number = 5,
volume = 114,
place = {United States},
year = {2018},
month = {1}
}