A deviation display method for visualising data in mobile gamma-ray spectrometry

Kock, P. C. De; Finck, Robert; Nilsson, Jens; Östlund, Karl; Samuelsson, Christer

doi:10.1016/j.apradiso.2010.04.004

Cited by 17 publications

(3 citation statements)

References 8 publications

(16 reference statements)

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“…Anomalies were identified by visual examination of the mapped outputs and individual spectra. Other methods to process data and identify anomalies are presented in the literature; including least squares fitting, subtraction of a time averaged background (Cresswell & Sanderson 2009, Kock et al 2010, and statistical analysis of spectra to extract principle components (Dixon 2004). The effects of topographic enclosure and localised variations in construction materials described in this paper result in differences in the measured spectrum compared to open field geometries with uniformly distributed activity.…”

Section: Tenormmentioning

confidence: 99%

Demonstration of lightweight gamma spectrometry systems in urban environments

Cresswell

Sanderson

Harrold

et al. 2013

Journal of Environmental Radioactivity

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Urban areas present highly complex radiation environments; with small scale features resulting from different construction materials, topographic effects and potential anthropogenic inputs from past industrial activity or other sources. Mapping of the radiation fields in urban areas allows a detailed assessment of exposure pathways for the people who live and work there, as well as locating discrete sources of activity that may warrant removal to mitigate dose to the general public. These areas also present access difficulties for radiometric mapping using vehicles or aircraft. A lightweight portable gamma spectrometry system has been used to survey sites in the vicinity of Glasgow to demonstrate the possibilities of radiometric mapping of urban areas, and to investigate the complex radiometric features such areas present. Variations in natural activity due to construction materials have been described, the presence of 137 Cs used to identify relatively undisturbed ground, and a previously unknown NORM feature identified. The effect of topographic enclosure on measurements of activity concentration has been quantified.The portable system is compared with the outputs that might be expected from larger vehicular or airborne systems. For large areas airborne surveys are the most cost effective approach, but provide limited spatial resolution, vehicular surveys can provide sparse exploratory data rapidly or detailed mapping of open areas where off-road access is possible. Backpack systems are ideally suited to detailed surveys of small areas, especially where vehicular access is difficult.

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Section: Tenormmentioning

confidence: 99%

Demonstration of lightweight gamma spectrometry systems in urban environments

Cresswell

Sanderson

Harrold

et al. 2013

Journal of Environmental Radioactivity

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“…Another method for visualising data in the search for orphan sources is proposed by Kock et al [9], which is based on the relative comparison of a channel in the different measured spectra. In another paper, Kock et al [10], propose an enhancement of this search method using AGS techniques by incorporating systematic and stochastic variations of background radiation to reduce false positives and failures in source detection.…”

Section: Introductionmentioning

confidence: 99%

Design and development of a detector system and software tool installed on a mobile laboratory to provide both radiological characterisation of large areas and a simple tool for localising radioactive sources

Rodríguez-Oliver,

Corbacho,

Caballero

2023

J. Radiol. Prot.

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In emergency situations where an immediate response is required to make appropriate decisions by the competent authorities, it is essential to have measurement tools that provide results as accurate as possible in real-time. This paper presents the description of the upgrade of the mobile laboratory of the Radiological Alert Network of Extremadura, focusing on the characterization of radioactive-contaminated land during emergency situations and the detection of radioactive sources. The detector system is based on two scintillation detectors and a car-borne dose rate monitor. Additionally, a software tool has been developed to collect information from the different devices involved (detectors, GPS, etc.) and display it in an intuitive manner. This system has been tested in an area of a former phosphate facility where soils remain contaminated to varying degrees with radionuclides of TE-NORM origin.

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“…Contour mapping and source search as an attractive research topic has drawn much attention in a radioactive field [4][5][6]. In a typical search for lost or stolen radioactive sources, five main strategies are used to conduct search activities.…”

Section: Introductionmentioning

confidence: 99%

Use of Multi-Rotor Unmanned Aerial Vehicles for Radioactive Source Search

Zhu

Wang

et al. 2018

Remote Sensing

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In recent years, many radioactive sources have been lost or stolen during use or transportation. When the radioactive source is lost or stolen, it is challenging but imperative to quickly locate the source before it causes damage. Nowadays, source search based on fixed-wing unmanned aerial vehicles (UAVs) can significantly improve search efficiency, but this approach has higher requirements for the activity of the uncontrolled radioactive source and the takeoff sites. The aim of this study was to design and demonstrate a platform that uses low-cost multi-rotor UAVs to automatically and efficiently search for uncontrolled radioactive sources even with lower activity. The hardware of this platform consists of a multi-rotor UAV, radiation detection sensor, main control module, gimbal and camera, and ground control station. In the search process, the ground control station and UAV communicate wirelessly in real time. To accommodate different search scenarios, the study proposed three search algorithms with a theoretical comparison. Then, field experiments based on the traversal search algorithm showed that the search system based on multi-rotor UAVs could effectively and accurately conduct contour mapping of a region and locate the radioactive source with an error of 0.32 m. The platform and algorithms enable accurate and efficient searching of radioactive sources, providing an innovative demonstration of future environmental risk assessment and management.

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A deviation display method for visualising data in mobile gamma-ray spectrometry

Cited by 17 publications

References 8 publications

Demonstration of lightweight gamma spectrometry systems in urban environments

Demonstration of lightweight gamma spectrometry systems in urban environments

Design and development of a detector system and software tool installed on a mobile laboratory to provide both radiological characterisation of large areas and a simple tool for localising radioactive sources

Use of Multi-Rotor Unmanned Aerial Vehicles for Radioactive Source Search

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