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Mobile techniques for rapid detection of concealed nuclear material

: Rosenstock, Wolfgang; Köble, Theo; Risse, Monika; Berky, Wolfram

Fulltext urn:nbn:de:0011-n-3278782 (567 KByte PDF)
MD5 Fingerprint: 6a26faccbc5214aecdf63419f8560f49
Created on: 20.2.2015

International Atomic Energy Agency -IAEA-, Wien; European Safeguards Research and Development Association -ESARDA-; Institute of Nuclear Materials Management -INMM-:
Symposium on International Safeguards 2014. Linking strategy, implementation and people : 20-24 October 2014, Vienna, Austria
Wien: IAEA, 2014
Paper 443, 8 pp.
Symposium on International Safeguards <12, 2014, Vienna>
Conference Paper, Electronic Publication
Fraunhofer INT ()

To prevent the diversion of nuclear material as well as illicit production, transport and use of nuclear material we investigated in mobile techniques to detect and identify such material in the field as early as possible. For that purpose we use a highly sensitive gamma measurement system installed in a car. It consists of two large volume plastic scintillators, one on each side of the car, each scintillator with 12 l active volume, and two extreme sensitive high purity Germanium detectors with 57 cm² crystal diameter, cooled electrically. The measured data are processed immediately with integrated, appropriate analysis software for direct assessment including material identification and classification within seconds. The software for the plastic scintillators can differentiate between natural and artificial radioactivity, thus giving a clear hint for the existence of unexpected material. In addition, the system is equipped with highly sensitive neutron detectors. We have performed numerous measurements by passing different radioactive and nuclear sources in relatively large distances with this measurement car. Even shielded as well as masked material was detected and identified in most of the cases. We report on the measurements performed in the field (on an exercise area) and in the lab and discuss the capabilities of the system, especially with respect to timeliness and identification. This system will improve the nuclear verification capabilities also.