Low altitude unmanned aerial vehicle for characterising remediation effectiveness following the FDNPP accident

Peter G Martin, Oliver D Payton, John S Fardoulis, David A Richards, Thomas Bligh Scott, Yosuke Yamashiki

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On the 12th of March 2011, The Great Tōhoku Earthquake occurred 70 km off the eastern coast of Japan, generating a large 14 m high tsunami. The ensuing catalogue of events over the succeeding 12 d resulted in the release of considerable quantities of radioactive material into the environment. Important to the large-scale remediation of the affected areas is the accurate and high spatial resolution characterisation of contamination, including the verification of decontaminated areas. To enable this, a low altitude unmanned aerial vehicle equipped with a lightweight gamma-spectrometer and height normalisation system was used to produce sub-meter resolution maps of contamination. This system provided a valuable method to examine both contaminated and remediated areas rapidly, whilst greatly reducing the dose received by the operator, typically in localities formerly inaccessible to ground-based survey methods. The characterisation of three sites within Fukushima Prefecture is presented; one remediated (and a site of much previous attention), one un-remediated and a third having been subjected to an alternative method to reduce emitted radiation dose.
Original languageEnglish
Pages (from-to)58-63
Number of pages6
JournalJournal of Environmental Radioactivity
Issue number1
Early online date26 Sep 2015
Publication statusPublished - 1 Jan 2016


Bibliographical note

Date of Acceptance: 06/09/2015


  • Fukushima
  • UAV
  • Gamma-spectrometry
  • Decontamination
  • Remediation

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