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Milk distribution and feeding practice data for the PATHWAY model.

G M Ward1, F W Whicker

  • 1Department of Animal Sciences, Colorado State University, Fort Collins 80523.

Health Physics
|November 1, 1990
PubMed
Summary
This summary is machine-generated.

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Milk consumption from Nevada Test Site fallout events in the 1950s was estimated using cow feeding and milk distribution data. Changes in dairy practices reduced radionuclide intake over the decade.

Area of Science:

  • Environmental Science
  • Nuclear Science
  • Public Health

Background:

  • Milk is a significant pathway for radionuclide ingestion, especially from fresh forage.
  • Nevada Test Site fallout events necessitated estimating radionuclide intake via milk during the 1950s.

Purpose of the Study:

  • To estimate radionuclide ingestion from milk following Nevada Test Site fallout.
  • To model radionuclide transfer through the food chain using the PATHWAY model.

Main Methods:

  • Compiled a database from personal interviews regarding milk sources and cow feeding practices.
  • Assessed milk distribution networks (private cows, local dairies, regional plants) across a nine-state area.
  • Analyzed pasture use (3-6 months, 0-80% of diet) and its decline over the 1950s.

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Main Results:

  • Milk sources shifted from private cows and local dairies to regional distributors.
  • Pasture use decreased, impacting radionuclide content in milk.
  • Increased milk shelf life and distribution range influenced consumption patterns.

Conclusions:

  • Changes in dairy industry practices and milk distribution significantly reduced human radionuclide intake from milk by the late 1950s.
  • The PATHWAY food-chain model effectively utilized collected data for fallout assessment.