A Remote-operated system to map radiation dose in the Fukushima Daiichi primary containment vessel

Nancekievill, M.*; Jones, A. R.*; Joyce, M. J.*; Lennox, B.*; Watson, S.*; Katakura, Junichi*; Okumura, Keisuke ; Kamada, So*; Kato, Michio*; Nishimura, Kazuya*

We are developping a submersible ROV system, coupled with radiation detectors aimed at mapping the interior of the reactors at the Fukushima Daiichi Nuclear Power Station. To map the -ray intensity environment a cerium bromide (CeBr $_{3}$ ) inorganic scintillator detector sensitive to -rays has been incorporated into the ROV to measure -ray intensity and identify radioactive isotopes. The ROV is a cylindrical shape with a diameter of about 150 mm, and it have two end caps of five pumps each allowing control of the ROV in 5 degree of freedom. It is possible to directly replace the CeBr $_{3}$ detector with a single crystal chemical vapour deposition (CVD) neutron detector with a $^{6}$ Li convertor foil that is capable of mapping the thermal neutron flux.

Language	:	English
Journal	:	Proceedings of 5th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA 2017) (USB Flash Drive)
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Pages	:	6 Pages
Publication Year/Month	:	2017/06
Meeting title	:	5th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA 2017)
Held date	:	2017/06
Location (city)	:	Lige
Location (country)	:	Belgium
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Keywords	:	Fukushima Daiichi Nuclear Power Station; small ROV; radiation detector; Fukushima Daiichi Nuclear Power Station Accident; 福島第一原子力発電所事故
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Registration No. : BB20170273
JAEA Abstracts No. : 45000943
Paper Submission No. : 19187

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