Conveners
O3.6 Analysis of Radionuclide Monitoring Data
- Ian Hoffman (CTBTO Preparatory Commission)
- Sylvia Generoso (Commissariat à l’énergie atomique et aux énergies alternatives (CEA))
In the analysis of radioxenon sampling data from three SAUNA QB systems sited in the North of England, a variety of different approaches have been used to identify the likely source(s) of over 300 detections of Treaty-relevant isotopes of radioxenon. This work utilises stack monitoring data from both European radionuclide emitters and local sources, forward atmospheric transport & dispersion...
The presence of radioactive particles and their nuclide mixture in the air is measured by gamma ray spectra through International Monitoring System radionuclide stations to help detect nuclear explosions. These gamma ray spectra are reported to the International Data Centre by each radionuclide station. We use supervised machine learning to show that the radionuclides present in each sample...
Between late November and early December 2022, large amounts of radioxenon were detected by multiple IMS stations and by the Swedish Radioxenon array, which at the time consisted of four SAUNA Q$_B$ detectors. In total, there were over 100 detections of Xe-133, with Xe-133m concurrently found in approximately a dozen samples. The continuous and complex nature of these detections, along with...
