Journal of Advanced Marine Science and Technology Society
Online ISSN : 2188-3262
Print ISSN : 1341-2752
ISSN-L : 1341-2752
Original Paper
Development of the unmanned surface vehicle for radiation monitoring at seabed—Observation of temporal change of radiocesium concentration in the sea bottom sediment at coastal zone of Fukushima—
Yukihisa SanadaKenji MiyamotoKotaro OchiYasuji MatsuzakiToshihiro OgawaYasuhiro Senga
Author information
JOURNAL FREE ACCESS

2018 Volume 24 Issue 2 Pages 9-18

Details
Abstract

Seven years passed since Fukushima Dai-ichi Nuclear Power Station accident which was caused large amount of radionuclide release to the sea. Elucidation of behavior mechanism of radiocesium in the seabed is required for restarting fishing industry. We developed radiation detection system using the unmanned surface vehicle for in-situ measurement of radiocesium concentration in seabed sediment. This system is able to automatically navigate to measurement point and obtain the radiation data on the bottom sediment. The detector was calibrated by comparing the actual sediment samples. The periodical measurement off-shore the Fukushima Prefecture was performed using developed this system. As these results, distribution of radiocesium concentration was changed due to oceanographic condition. However, radiocesium inventory was tendency to decrease according to radiocesium half-life in measurement area. This system is effective for elucidation of behavior mechanism of radiocesium because it can easily measure the radiocesium concentration in the bottom sediment.

Content from these authors
© 2018 Advanced Marine Science and Technology Society
Previous article Next article
feedback
Top