1. EMRAS II, Theme 3: Assessment after Emergency Situations Urban Working Group Kathleen Thiessen, leader 19-23 January 2009 Vienna

2. Preliminary working plan Three modelling exercises identified –Atmospheric dispersion, short-range –Atmospheric dispersion, longer-range –Contaminant transport and countermeasures Draft scenarios by interim meeting Preliminary calculations by next plenary meeting

3. Atmospheric dispersion, short-range Dispersion from an explosion –Czech data set Comparison of model predictions with measurements Model intercomparison for additional endpoints

4. Atmospheric dispersion, longer-range Dispersion from a hypothetical NPP accident Deposition in an urban environment Information from France, Spain, and/or Canada Model intercomparison

5. Contaminant transport and countermeasures Two situations –Defined deposition, detailed description of part of a city (Seoul) –Predicted deposition from NPP dispersion exercise Model intercomparisons Dose rates, countermeasures, doses

6. Preliminary schedule Proposed interim meeting in Prague –29-30 June 2009 Draft scenarios before meeting First calculations by next full meeting (January 2010)

7. Participating countries Austria Belgium Canada Croatia Cuba Czech Republic France Germany Korea Slovakia Spain Ukraine United Kingdom United States