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A Review of the Radiological Assessments Corporation's Fernald Dose Reconstruction Report (1997) / Chapter Skim
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MODEL VALIDATION
Pages 11-14

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From page 11...
... Multiple site-specific receptor locations were examined, and the examination considered the multiple release points within the FMPC production area, the physical and chemical characteristics of the release sources, the rate of diffusion as a Unction of the distance between the site-specific receptor locations and the multiple release points, the size distribution of the wet and dry particles, the resuspension into air of material previously deposited on the ground, the runoff and leaching of material deposited on soil, the rate of radioactive decay, and the biologic pathways through exposed persons. The atmosphericdispersion models used to estimate ground-level air concentration at specific locations 11
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From page 12...
... It was concluded that the observed data from the meteorologic tower after August 1986 were the most representative of all those before 1987. The mean wind speed at the Cincinnati airport was not considered reliable for use in the mode} because direct comparison indicated mean wind speeds frequently twice as high as the measurements made at FMPC.
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From page 13...
... considered the top 5 cm of soil, whereas RAC considered the top 1O cm. Measurements of radon at boundary monitoring stations before and after the silo domes were sealed were proportional to predicted decreases based on the mode!
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From page 14...
... For example, Gaussian plume-dispersion models, representation of uncertainties with probability distributions, and Monte Cario techniques were used. In general, for both uranium and radon in soil, air, and water, the agreement between predicted and observed concentrations was acceptable.
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Key Terms

  • predicted values
  • mean wind
  • meteorologic data
  • measured values
  • receptor locations

  • rac report
  • radon concentrations
  • multiple release
  • multiple boundary
  • cincinnati airport

  • simulated environmental
  • values fall
  • fission products
  • actually followed
  • exposed persons

  • describing transport
  • modeling air
  • independent measured
  • relevant measurements
  • necessity included

  • meteorologic tower
  • comparison indicated
  • observations based
  • mathematical model
  • larger uncertainty

  • direct comparison
  • predicted decreases
  • applicable models
  • frequently twice
  • wind speed


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