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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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IV. ATMOSPHERIC PATHWAY
Pages 23-28

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From page 23...
... For iodine-131 dose estimates, 12 categories of representative individuals are distinguished by age, sex, and lifestyle determinants for the years of maximum release, 1944-1951, over 1,102 locations within the HEDR study area. Doses from strontium-90, ruthenium-103, ruthenium-106, cerium-144, and plutonium-239 are also estimated for a maximum representative adult in nine locations for 1944-1972.
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From page 24...
... Efforts need to be made to use as much real-time meteorologic information as possible, or the justification for using only 1944-1949 data should be provided in the report. The committee is not certain whether the final model used for iodine-131 dose calculations allows inputs of meteorologic parameters related to the locations of the real persons being considered, or whether it includes appropriate radiation- or tissue-weighting factors.
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From page 25...
... clearly illustrate the magnitude of the effective dose equivalents; perhaps these should be put into perspective by comparing them with annual background radiation doses from external sources. The hierarchic approach to determining the importance of each parameter in the calculation is a good approach and was a good way to determine that the ingestion conversion parameter was the most important.
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From page 26...
... The exposure area considered covered most of central Washington State, and the calculated doses changed several orders of magnitude for the different areas on the basis of their location in relation to the Hanford site. Even within a given area, exposure ranges included 3 to 4 fold differences; this indicates the importance of exact location and movement within the area.
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From page 27...
... As previously mentioned, estimates to the maximally exposed individual are misleading when a few people live in high-dose areas. A major advantage of estimating a dose to a "critical group" is that this approach avoids having dose estimates being prejudiced by a small number of individuals with unusual habits.
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From page 28...
... Comparison of doses from this study with doses from the feasibility study indicates that some dose estimates have increased and others have decreased; but the total impact on the dose distribution is unclear. That information is needed both for the power calculations of the Hanford Thyroid Disease Study and to develop procedures for scoping and epidemiologic studies at other locations.
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Key Terms

  • dose estimates
  • representative individuals
  • separation plants
  • hanford site
  • international commission

  • environmental accumulation
  • effective dose
  • exposed individual
  • absorbed dose
  • dose calculations

  • radiological protection
  • dose distribution
  • icrp publication
  • real persons
  • external sources

  • final model
  • takes residential
  • meteorologic parameters
  • largest exposures
  • individual instead

  • using methods
  • special effort
  • external exposure
  • people live
  • cider code

  • doses changed
  • potentially received
  • dose history
  • doses received
  • environmental reports


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