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

Journal Article · · Health Physics
 [1];  [2];  [1]
  1. Worcester Polytechnic Inst., Worcester, MA (United States). Dept. of Physics
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
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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.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1464183
Report Number(s):
SAND--2017-6806J; 654860
Journal Information:
Health Physics, Journal Name: Health Physics Journal Issue: 5 Vol. 114; ISSN 0017-9078
Publisher:
Health Physics SocietyCopyright Statement
Country of Publication:
United States
Language:
English

Figures / Tables (6)

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Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
airborne
contamination
dosimetry
environmental
inhalation
internal
radioactivity