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Related Experiment Video

Updated: Jul 15, 2026

Design and Construction of an Urban Runoff Research Facility

Design and Construction of an Urban Runoff Research Facility

Published on: August 8, 2014

Urban working groups in the IAEA's model testing programmes: overview from the MODARIA I and MODARIA II programmes.

Kathleen M Thiessen¹, Marija Zlata Boznar², Thomas W Charnock³

¹Oak Ridge Center for Risk Analysis, Oak Ridge, TN, United States of America.

Journal of Radiological Protection : Official Journal of the Society for Radiological Protection

|February 17, 2022

Summary

IAEA

Keywords:

environmental modelling radioactive contamination urban environments

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Area of Science:

Environmental Science
Radiological Protection
Computational Modeling

Background:

IAEA has a history of working groups focused on modeling radioactive contamination in urban settings.
Previous programs include Validation of Environmental Model Predictions, EMRAS, EMRAS II, MODARIA I, and MODARIA II.

Purpose of the Study:

To test and enhance computer models for assessing radioactive contamination in urban environments.
To evaluate contaminant dispersion, deposition, redistribution, and the effectiveness of countermeasures.
To improve decision-making and public communication following radiological emergencies.

Main Methods:

Description of exercises from MODARIA I and MODARIA II programs.
Inclusion of short-range and mid-range atmospheric dispersion exercises using field data and tracer studies.
Utilized hypothetical urban dispersion scenarios and data from the Fukushima Daiichi accident.

Main Results:

Model capabilities were tested and improved through various exercises.
Enhanced models lead to better assessment of contamination scenarios.
Improved decision-making and public communication are direct outcomes of enhanced model capabilities.

Conclusions:

Continuous model testing and improvement are crucial for radiological emergency preparedness.
Accurate modeling enhances the assessment of contamination and human exposure.
Better models facilitate informed decision-making and effective public engagement during nuclear incidents.