The Integration of a CeBr3 Detector with a Submersible ROV for Reactor Assessment at Fukushima Daiichi

Jones, Ashley R. and Nancekievill, Matthew and Lennox, Barry and Watson, Simon and Katakura, Jun Ichi and Okumura, Keisuke and Kamada, So and Katoh, Michio and Nishimura, Kazuya and Snoj, Luka and Jazbec, Anze and Joyce, Malcolm J. (2018) The Integration of a CeBr3 Detector with a Submersible ROV for Reactor Assessment at Fukushima Daiichi. In: 2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings. 2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings . Institute of Electrical and Electronics Engineers Inc., AUS. ISBN 9781538684948

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Abstract

The premise behind this research is the characterisation and integration of a unique detector system on board a submersible, remotely-operated vehicle (ROV) for the end purpose of fuel debris characterisation at Fukushima Daiichi. Currently, at Fukushima Daiichi. Whilst precise knowledge of the location of the core debris at Fukushima is not known it is commonly assumed that fuel has leaked through into the base of the pedestal below and it is suggested that it may have moved outside of the pedestal into the lower plenum. The flooding of the reactor floors immediately following the Fukushima accident adds an extra element of complexity for the detection system requiring it to be submersible and to hold any detector system in water-tight confinement. The research presented here focusses on the use of a CeBr3 inorganic scintillator detector with a unique configuration of an in-built HV supply for ease of integration within an ROV in a submerged environment. The detector has been tested in several environments: small wave tank for source identification and a TRIGA reactor and a 60Co irradiator. It is hoped that the CeBr3 detector will constitute one component of an on-board detector payload to determine the suitability for the localisation and identification of fuel debris inside the cores at Fukushima.

Item Type:
Contribution in Book/Report/Proceedings
Additional Information:
Funding Information: This work was funded by the Engineering and Physical and Physical Sciences Research Council (EPSRC: EP/N017749/1), MEXT (Japan) and the Royal Society via a Wolfson Research Merit Award. A. R. Jones and M. J. Joyce are with Lancaster University, UK (telephone: +44 1524 593812, e-mail: m.joyce@lancaster.ac.uk). B. Lennox, M. Nancekievill and S. Watson are with University of Manchester, UK. K. Okumura is with the Japan Atomic Energy Agency, Japan. S. Kamada, M. Katoh, K. Nishimura and K. Sawada are with the National Maritime Research Institute, Japan. J. Katakura is with the Nagoaka University of Technology, Japan. L. Snoj and A. Jazbec are with the Reactor Centre, Jošef Stefan Institute, Slovenia. Publisher Copyright: © 2018 IEEE. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
167686
Deposited By:
Deposited On:
28 Oct 2022 12:55
Refereed?:
Yes
Published?:
Published
Last Modified:
21 Nov 2022 17:43