Abstract
Abstract The radionuclide monitoring network enables continuous world-wide observation of airborne radionuclides in the verification regime of the Comprehensive Nuclear Test-Ban-Treaty (CTBT). The radionuclide technology – analysis of aerosol samples and xenon at 80 sites hosting radionuclide monitoring stations – contributes to the International Monitoring System (IMS). Sixteen radionuclide laboratories will support the radionuclide monitoring network. Their main function is additional analysis of aerosol samples. Samples categorised as Level 5 that contain multiple anthropogenic radionuclides, at least one of which is a fission or an activation product, will always be sent out for laboratory analysis. A number of samples will be re-analysed at the radionuclide laboratories irrespective of category. This serves the purpose of quality control for the results produced by the stations.
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