Summary of the BIOMOVS A4 scenario: Testing models of the air-pasture-cow milk pathway using Chernobyl fallout data
Journal Article
·
· Health Physics
- Chalk River Laboratories, Ontario (Canada)
- SENES, Oak Ridge Inc., TN (United States)
- Wissen und TEchnik GmbH, Munich (Germany)
A unique opportunity to test dose assessment models arose after the Chernobyl reactor accident. During the passage of the contaminated plume, concentrations of {sup 131}I and {sup 137}Cs in air, pasture, and cow`s milk were collected at various sites in the northern hemisphere. Afterwards, contaminated pasture and milk samples were analyzed over time. Under the auspices of the Biospheric Model Validation Study (BIOMOVS), data from 13 sites for {sup 131}I and 10 sites for {sup 137}Cs were used to test model predictions for the air-pasture-cow milk pathway. Calculations were submitted for 23 models, 10 of which were quasi-steady state. The others were time-dependent. Daily predictions and predictions of time-integrated concentration of {sup 131}I and {sup 137}Cs in pasture grass and milk for six months post-accident were calculated and compared with observed data. Testing against data from several locations over time for several steps in the air-to-milk pathway resulted in a better understanding of important processes and how they should be modeled. This model testing exercise showed both the strengths and weaknesses of the models and revealed the importance of testing all parts of dose assessment models whenever possible. 19 refs., 14 figs., 4 tabs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 380941
- Journal Information:
- Health Physics, Journal Name: Health Physics Journal Issue: 2 Vol. 71; ISSN HLTPAO; ISSN 0017-9078
- Country of Publication:
- United States
- Language:
- English
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