Validation of 131I ecological transfer models and thyroid dose assessments using Chernobyl fallout data from the Plavsk district, Russia
Résumé
Within the project "Environmental Modelling for Radiation Safety" (EMRAS) organized by the IAEA in 2003 experimental data of 131I measurements following the Chernobyl accident in the Plavsk district of Tula region, Russia were used to validate the calculations of some radioecological transfer models. Nine models participated in the inter-comparison. Levels of 137Cs soil contamination in all the settlements and 131I/137Cs isotopic ratios in the depositions in some locations were used as the main input information. 370 measurements of 131I content in thyroid of townspeople and villagers, and 90 measurements of 131I concentration in milk were used for validation of the model predictions. A remarkable improvement in models performance comparing with previous inter-comparison exercise was demonstrated. Predictions of the various models were within a factor of three relative to the observations, discrepancies between the estimates of average doses to thyroid produced by most participant not exceeded a factor of ten. © 2009 Elsevier Ltd.
Mots clés
Iodine-131
Isotopic ratios
Model prediction
Radiation safety
Soil contamination
Transfer models
Cesium
Fallout
Forecasting
Industrial chemicals
Iodine
Nuclear reactor accidents
cesium 137
iodine 131
radioactive iodine
assessment method
cesium isotope
Chernobyl accident
concentration (composition)
endocrine system
fallout
iodine
isotopic ratio
model validation
numerical model
performance assessment
prediction
adult
article
bioaccumulation
child
concentration (parameters)
dosimetry
environmental monitoring
environmental radioactivity
experimental model
female
human
infant
isotope analysis
isotope tracing
male
milk
newborn
nonhuman
preschool child
radiation measurement
radioactive contamination
Russian Federation
school child
validation study
animal
chemical model
environmental exposure
metabolism
methodology
Poaceae
radiation monitoring
radiation response
radioactive waste
soil pollutant
thyroid gland
Eurasia
Animals
Chernobyl Nuclear Accident
Child
Preschool
Dose-Response Relationship
Radiation
Environmental Exposure
Humans
Iodine Radioisotopes
Milk
Models
Chemical
Radiation Monitoring
Radioactive Fallout
Russia
Soil Pollutants
Radioactive
Thyroid Gland
Chernobyl fallout
Dose assessments
Environment modeling
Environmental modelling
Experimental data
Intercomparison exercise
Intercomparisons