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Mapping of seafloor radionuclides off Miyagi using a towed gamma ray spectrometer

Mapping of seafloor radionuclides off Miyagi using a towed gamma ray spectrometer
Mapping of seafloor radionuclides off Miyagi using a towed gamma ray spectrometer

An instrument to continuously map the distribution of radionuclides on the seafloor has been developed to survey radioactive discharge from the Fukushima Dai-ichi Nuclear Power Plant. To date, the system has been deployed off the east coast of Japan to measure the distribution of 137Cs over a total towed distance of more than 320 km. Here, we describe the results of measurements made along two transect north of the plant, off Miyagi, during February 2013, almost two years after the accident. There results reveal the continuous distribution of radionuclides over a total distance of 140 km. The accuracy of the measurements is verified through laboratory analysis of samples obtained during the survey. The results demonstrate that towed in situ measurement techniques provide an effective solution for rapid, low cost monitoring of radioactive material on the seafloor. It is expected that continued monitoring efforts using the device can contribute to our understanding of radionuclide distribution on the seafloor following the accident at the plant.

Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Ohnishi, Seiki
035c497a-ec02-4ce9-9879-a39a916b5d9a
Ura, Tamaki
b8fea5ba-e731-40fd-8544-1db1ca9f356b
Odano, Naoteru
acead221-760b-421e-8c06-9907c2542f9e
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Ohnishi, Seiki
035c497a-ec02-4ce9-9879-a39a916b5d9a
Ura, Tamaki
b8fea5ba-e731-40fd-8544-1db1ca9f356b
Odano, Naoteru
acead221-760b-421e-8c06-9907c2542f9e

Thornton, Blair, Ohnishi, Seiki, Ura, Tamaki and Odano, Naoteru (2013) Mapping of seafloor radionuclides off Miyagi using a towed gamma ray spectrometer. OCEANS 2013 MTS/IEEE San Diego Conference: An Ocean in Common, San Diego, CA, United States. 23 - 26 Sep 2013.

Record type: Conference or Workshop Item (Paper)

Abstract

An instrument to continuously map the distribution of radionuclides on the seafloor has been developed to survey radioactive discharge from the Fukushima Dai-ichi Nuclear Power Plant. To date, the system has been deployed off the east coast of Japan to measure the distribution of 137Cs over a total towed distance of more than 320 km. Here, we describe the results of measurements made along two transect north of the plant, off Miyagi, during February 2013, almost two years after the accident. There results reveal the continuous distribution of radionuclides over a total distance of 140 km. The accuracy of the measurements is verified through laboratory analysis of samples obtained during the survey. The results demonstrate that towed in situ measurement techniques provide an effective solution for rapid, low cost monitoring of radioactive material on the seafloor. It is expected that continued monitoring efforts using the device can contribute to our understanding of radionuclide distribution on the seafloor following the accident at the plant.

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More information

Published date: September 2013
Venue - Dates: OCEANS 2013 MTS/IEEE San Diego Conference: An Ocean in Common, San Diego, CA, United States, 2013-09-23 - 2013-09-26

Identifiers

Local EPrints ID: 434077
URI: http://eprints.soton.ac.uk/id/eprint/434077
PURE UUID: 87bbd45c-e24b-42f4-87eb-dc0d3b598031

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Date deposited: 11 Sep 2019 16:30
Last modified: 11 Sep 2019 16:30

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