CTBT: Science and Technology Conference 2023 - SnT2023

Solution of the National Data Center Preparedness Exercise 2019 by Using Inverse Atmospheric Transport Modelling

O2.4-549

20 Jun 2023, 17:25

15m

Prinz Eugen Saal

Oral T2.4 Atmospheric and Subsurface Radionuclide Background and Dispersion O2.4 Atmospheric and Subsurface Radionuclide Background and Dispersion

Speaker

Mr Sayed Mekhaimer (National Research Institute of Astronomy and Geophysics (NRIAG))

Description

The National Data Center Preparedness Exercise 2019 (NPE- 2019) provides an opportunity to evaluate the ability of the National Data Center (NDC) to use available International Monitoring System (IMS) data, techniques, and tools to verify compliance with the Comprehensive Nuclear-Test-Ban Treaty. In NPE-2019, there are unusual detections of radioactive particulates (Cs-134, Cs-137, La-140, and Ba-140) and noble gases (Xe-133, Xe-133m, and Xe-135) at some IMS stations. This NPE can be solved by data fusion between solutions of seismic and infrasound detections and the forward atmospheric transport modelling. However, the current work will illustrate the ability to use adjoint atmospheric transport model outputs, source-receptor sensitivity (SRS) fields from radionuclide IMS stations and the corresponding concentrations values of those multidetections to confine the source region and to estimate the source term.

Promotional text

Source term estimation of NPE-2019 by using inverse atmospheric transport modelling.

Presentation materials

O2.4-549_Sayed.pdf