Authors:
Y. Murata Kanazawa University Low Level Radioactivity Laboratory Tatsunokuchi-cho, Nomi-gun, Ishikawa 923-1224 Japan

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T. Muroyama Kanazawa University Low Level Radioactivity Laboratory Tatsunokuchi-cho, Nomi-gun, Ishikawa 923-1224 Japan

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T. Imanaka Kyoto University Research Reactor Institute Kumatori-cho, Sennan-gun, Osaka 590-0494 Japan

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M. Yamamoto Kanazawa University Low Level Radioactivity Laboratory Tatsunokuchi, Ishikawa 923-1224 Japan

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K. Komura Kanazawa University Low Level Radioactivity Laboratory Tatsunokuchi, Ishikawa 923-1224 Japan

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Abstract  

To estimate fast neutron fluence released by the JCO criticality accident in Tokai-mura, 54Mn, which is produced by the 54Fe(n,p)54Mn reaction, was determined in soil samples by ultra low background g-ray spectrometry after radiochemical separation. Activities of 54Mn, using 30-200 g soil samples were detected in soil samples from 13 points in all directions within a 20 m zone from the precipitation vessel we have used. The levels of 54Mn ranged from 0.015 to 2.12 mBq/g soil. By using these data and MCNP, the fast neutron fluences were estimated.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)