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Refinements to the Methods for Developing Spacecraft Exposure Guidelines (2016) / Chapter Skim
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3 Selecting and Prioritizing Contaminants for Assessment
Pages 41-43

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From page 41...
... Major contaminants are chemicals produced from off-gassing of cabin materials, components, and equipment; metabolic waste products from crew members; chemicals formed in the water treatment system; chemicals added to the water supply to retard bacterial growth; and compounds formed by chemical and physical processes in the cabin air. Scenarios considered are continuous or frequent releases from routine operations and activities; inadvertent, accidental, or emergency releases; and releases from experiments performed on the space station.
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From page 42...
... Priority rankings could then be compared in a way akin to sensitivity analysis in mathematical risk assessment. Similar conclusions about available schemes were drawn by other NRC committees formed to provide the US Environmental Protection Agency with assistance in establishing a priority-setting process for drinking water contaminants (NRC 1999, 2001)
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From page 43...
... Recommendation: The committee endorses NASA's use of a combination of these approaches to select chemicals for risk assessment. The process should be described to support the selection process.
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Key Terms

  • setting priorities
  • drinking water
  • hoc approach
  • candidate chemicals
  • spacecraft water

  • water exposure
  • exposure guidelines
  • insufficient resources
  • comprehensive risk
  • potential air

  • choosing candidates
  • environmental control
  • routine operations
  • formal risk
  • committees formed

  • priority setting
  • sensitivity analysis
  • rial growth
  • regulatory consideration
  • setting considered

  • unequal weights
  • implicit judgments
  • water supply
  • matical risk
  • emergency releases

  • cabin materials
  • evaluated existing
  • potential human
  • guidelines found
  • chemicals produced


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