Role of the Met Office in the UK Response to Nuclear Emergencies

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1 Role of the Met Office in the UK Response to Nuclear Emergencies MODELLING Susan Leadbetter, Matthew Hort and Sarah Millington MATERIAL

2 Local Response National Response UK response to UK emergency is controlled at the local level For larger events government response may be mobilised to provide advice and resources UK response to overseas emergency is controlled by government Met Office has a support role at both the local and government level

3 Local Response Structure STAC Strategic What we intend to do Scientific and Technical Advice Cell Tactical How we intend to do it Expert agencies including the Met Office and Public Health England Operational Do it

4 Default response PACRAM: Procedures And Communications following Release of radioactive Material Short range forecast (3 hours, 10km) Used when information is sparse Provided to operators, agencies and emergency services Quick to produce. Produces within 20 minutes.

5 National Response Increasing Coverage (area and/or population Increasing Impact

6 Government Response Government Support STAC Scientific and Technical Advice Cell Strategic Tactical Expert agencies including the Met Office and Public Health England Operational

7 Scientific Advisory Group for Emergencies Other advisors Expert government agencies Leading nongovernment experts Chief Scientist Scientific Advisory Group (SAGE) Cabinet Office Briefing Room (COBR) Other advisors e.g. Logistics, transport

8 Example of advice prepared within framework of SAGE Dispersion modelling Impact modelling Inputs: Source information Weather forecast models Dissemination Everyone responsible for own inputs but Response is joint Communication is key

9 RIMNET: Radiological Incident Monitoring NETwork Consolidating information and advice Sharing information Monitoring data Model output e.g. Dispersion modelling Consolidated information Environment data Population data

10 Working Together: During Fukushima Office of Nuclear Regulation Source Information Met Office Dispersion and deposition Public Health England Environment Agency Impact Assessment Assessment of current conditions What if scenarios (reasonable worst case)

11 Working Together: After Fukushima Aim: Provide rapid assessments of the consequences of radiological releases for emergency response Requires joint Agency expertise Building relationships Requires regular communication (during and outside of events) Source terms Weather, dispersion Consequence assessment Display & Dissemination

12 Operational Model Description Items Code name Development organization Operational organization Air flow model Gas dispersion model Dry deposition model Wet deposition model Precipitation data Calculation spatial domain Calculation time step Output data Terrain effect Source term estimation Met Office NAME (Numerical Atmospheric-dispersion Modelling Environment Met Office Met Office 4 dimensional meteorology from model (e.g. Unified Model or ECMWF) Lagrangian Particle Model Deposition velocity or resistance analog model Parametrised with separate coefficients for wash out, rain out, rain and snow Input from meteorological model or observed data (radar) Variable Variable Air concentration, deposition, meteorological parameters, cloud gamma dose Imported from meteorological model Provided by other agencies

13 Useful Web Pages UK Government Emergency Documentation RIMNET Met Office Hazard information services

14 Questions?

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