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A Review of Two Hanford Environmental Dose Reconstruction Project (HEDR) Dosimetry Reports Columbia River Pathway and Atmospheric Pathway (1995) / Chapter Skim
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EXECUTIVE SUMMARY
Pages 1-5

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From page 1...
... PNWD-2227 HEDR describes the methods used to estimate doses received by representative individuals who ingested water, fish, or waterfowl from the Columbia River or who swam in or boated on the river. It uses information on radionuclides released from Hanford reactors (Heeb and Bates, 1994)
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From page 2...
... A principal exposure pathway for many of these people was milk from cows that ate vegetation contaminated by iodine-131 released into the air from the Hanford site. This document describes the methods used to estimate doses received by representative individuals who consumed contaminated foodstuffs, inhaled contaminated air, or were directly exposed to radioactive materials released from the Hanford site, and it presents re-estimates of many of the doses that were given in an earlier report of a feasibility study for the atmospheric pathway (Pacific Northwest Laboratory, l991b)
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From page 3...
... It would have been helpful too if the report contained a fuller definition of source terms, model validation, and demographic characteristics ascribed to the three representative individual types on whom doses are computed should be included. The details are presented in other reports, which 3
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From page 4...
... ye is important that the readers of the HEDR reports understand the difference between modeling and dose calculation for environmental-impact assessment and for retrospective dose assessment. In environmental-impact assessment, as has been done at Hanford in the past, a model is developed with a hypothetical target individual and a hypothetical population in mind, and a "representative" source term is developed as input to the model to calculate projected exposures.
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From page 5...
... Such an estimate of the "societal impact" would also have a benefit in terms of placing the risk estimates in perspective by contrasting them, for example, to similar estimates based on doses received from natural, background radiation.
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Key Terms

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  • river pathway

  • atmospheric pathway
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  • northwest laboratory
  • collective doses
  • actual doses
  • materials released
  • hypothetical population

  • actual exposure
  • projected exposures
  • radioactive materials
  • hanford reactors
  • dose calculation

  • international commission
  • whom doses
  • radionuclides released
  • dose assessment
  • specific environmental

  • hedr study
  • stop short
  • hedr focuses
  • authors emphasize
  • environmental transport


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