A5066636514- Radioactive contamination and transfer
- Radioactivity and Radon Measurements
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Radioactive element chemistry and processing
- Atmospheric and Environmental Gas Dynamics
- Nuclear and radioactivity studies
- Atmospheric chemistry and aerosols
- Graphite, nuclear technology, radiation studies
- Isotope Analysis in Ecology
- Nuclear reactor physics and engineering
- Radioactive Decay and Measurement Techniques
- Neutrino Physics Research
- Nuclear Materials and Properties
- Medical Imaging Techniques and Applications
Atomic Weapons Establishment
2016-2025
University of Surrey
2020-2023
Abstract Radionuclides are monitored in the atmosphere for signatures of nuclear explosions, as part verification Comprehensive Nuclear-Test-Ban Treaty (CTBT). Civil facilities, such Nuclear Power Plants (NPPs) and Isotope Production Facilities (IPFs) sources anthropogenic radionuclides these sometimes indistinguishable to those a explosion. In order improve understanding civil radionuclide-emitting facilities their impact on International Monitoring System (IMS) CTBT, group scientists from...
Radionuclides are emitted from nuclear power reactors to the atmosphere and often measured on International Monitoring System (IMS) - primary tool of Comprehensive Nuclear-Test-Ban Treaty (CTBT) for monitoring signs explosions around world. During refuel an advanced gas-cooled reactor (AGR) coolant gas is processed filtered before being exhausted atmosphere. Charcoal filter paper samples processing plant have been using high purity germanium γ-ray detectors identify which radionuclides...
The International Monitoring System (IMS) is a unique global network of sensors, tuned to measure various phenomenology, with the common goal detecting nuclear explosion anywhere in world. One component this collects measurements radioactive particulates and gases (collectively known as radionuclides) present atmosphere; through this, compliance Comprehensive Nuclear-Test-Ban Treaty (CTBT) can be verified. radionuclide sub-network consists 120 sensors across 80 locations, supported by 16...
Activities of radioxenon isotopes are reported from an Advanced Gas-cooled Reactor (AGR) during periods gaseous release. Xenon relevant to the monitoring regime Comprehensive Nuclear-Test-Ban Treaty (CTBT). These releases may affect detections International Monitoring System (IMS) by influencing background. Time series activity plots have been produced both in-core and direct measurement at point release using a stack monitor system. Ratio data sets with results compared commonly chosen...
In 2015 and 2016, atmospheric transport modeling challenges were conducted in the context of Comprehensive Nuclear-Test-Ban Treaty (CTBT) verification, however, with a more limited scope respect to emission inventories, simulation period number relevant samples (i.e., those above Minimum Detectable Concentration (MDC)) involved. Therefore, comprehensive challenge was organized 2019. Stack release data Xe-133 provided by Institut National des Radioéléments/IRE (Belgium) Canadian Nuclear...
The prevalence of isotopes radioxenon in the atmosphere poses a problem for International Monitoring System (IMS) Comprehensive Nuclear-Test-Ban Treaty (CTBT). atmospheric background has accumulated due to emissions from civil nuclear facilities and as result, IMS frequently detects that might be considered signal explosion. UK National Data Centre (NDC) at Atomic Weapons Establishment (AWE) analyses all data radionuclide network through new 'event analysis' pipeline, works determine source...
In June 2020, observations of anthropogenic radionuclides in Estonia, Finland, and Sweden that were not related to any acknowledged environmental release led a comprehensive investigation on the source cause unusual emissions. Several observed list Comprehensive Nuclear-Test-Ban Treaty (CTBT) relevant as an indicator potential nuclear test, warranted detailed investigation. While analysis aerosol samples coupled with Atmospheric Transport Dispersion Modelling (ATDM) is standard approach for...
Abstract Detection of radioxenon is often considered the most probable indicator an underground nuclear explosion. GBL15 UK’s Comprehensive Nuclear-Test-Ban Treaty Certified Radionuclide Laboratory, operated at AWE Aldermaston and has a history developing high fidelity coincidence detection systems for particulate radionuclides. The Laboratory also operates SAUNA II system, using NaI(Tl) plastic scintillator detectors to measure β – γ coincidences from decay four isotopes, namely 133 Xe, 135...