Atmospheric dispersion models for releases of radioactivity from small explosions have obvious utility for predicting "what if" situations, often in the context of planning and preparedness. Testing the accuracy and reliability of the models is essential to improving the models as well as increasing the experience of the assessors, both individuals and organizations. The International Atomic Energy Agency's model testing programs have provided an opportunity both for comparing model results among assessors from various countries and for comparing model results with measurements obtained from field tests. This presentation provides a very brief history of the IAEA's international model testing programs and general lessons learned. Most of the presentation will focus on tests of short-range atmospheric dispersion models from three IAEA programs between 2009 and 2019. Assessors were provided specified situations to model, corresponding to a series of field tests carried out in the Czech Republic which consisted of small explosions with radioactive tracers. Measurements from the field tests were withheld from assessors until initial model predictions were submitted. Comparison of the initial model predictions with the measurements then enabled revision of models as desired to improve the model results.
The Terrorism Risk Assessment, Modelling and Mitigation Seminar Series (TRAMMSS) is a virtual seminar series focused on technical topics related to terrorism risk assessment, and modelling, including blast modelling and response; IEDs; vehicles as weapons; CBRN; big data for risk assessment, security and screening; and associated mitigation measures.
Speakers
Dr Kathleen Thiessen is a Senior Scientist at Oak Ridge Center for Risk Analysis in Tennessee, where she works in the field of human health risk assessment, including environmental transport of contaminants; evaluation of exposures, doses, and risks to human health from chemical and radiological contaminants; and the use of uncertainty analysis in human health risk assessment. She has led several working groups on urban contamination and dose reconstruction for the International Atomic Energy Agency's programs on environmental transport modeling (BIOMASS, EMRAS and EMRAS II, MODARIA and MODARIA II) and served on the coordinating committees of the programs. Dr. Thiessen has contributed to a number of open literature publications on the use of international data sets to test and improve the accuracy of mathematical models used to assess the environmental fate and consequences of releases of radioactivity, as well as to a set of papers providing a method for estimation of doses from exposure to radioactive fallout following nuclear detonations. She has served on subcommittees for the United Nations Scientific Committee on the Effects of Atomic Radiation and the National Research Council.
Who should attend
This seminar is open to guests from outside 成人直播, who may work in academia, research, or industry. Due to the potentially sensitive nature of this seminar series, guests should be able to show that they are affiliated with an appropriate bona fide organisation.Cost
The event is free of charge, but participants must register for the TRAMMSS mailing list in advance.How to register
To attend this seminar, you must register for the TRAMMSS mailing list via the . Upon mailing list registration, you will be sent a second link to register for the webinar itself.Further information on the TRAMMSS community can be found on the main website at cranfield.ac.uk/TRAMMSS.
