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Journal Articles

Anthropogenic radionuclides in sediment in the Japan Sea; Distribution and transport processes of particulate radionuclides

Otosaka, Shigeyoshi; Amano, Hikaru; Ito, Toshimichi; Kawamura, Hideyuki; Kobayashi, Takuya; Suzuki, Takashi; Togawa, Orihiko; Chaykovskaya, E. L.*; Lishavskaya, T. S.*; Novichkov, V. P.*; et al.

Journal of Environmental Radioactivity, 91(3), p.128 - 145, 2006/00

https://doi.org/10.1016/j.jenvrad.2006.09.001
 Times Cited Count：20 Percentile：42.09(Environmental Sciences)

Distributions of radionuclides ($$^{90}$$Sr, $$^{137}$$Cs and $$^{239+240}$$Pu) in seabed sediment in the Japan Sea were observed during 1998-2002. Observed inventories of anthropogenic radionuclides in sediment ranged 0.1-86 Bq m$$^{-2}$$ for $$^{90}$$Sr, 23-379 Bq m$$^{-2}$$ for $$^{137}$$Cs and 0.1-86 Bq m$$^{-2}$$ for $$^{239+240}$$Pu. In the deep part ($$>$$ 2 km depth) of the western Japan Basin, $$^{239+240}$$Pu/$$^{137}$$Cs inventory ratios were larger than those in the central Yamato Basin although inventories of radionuclides were not different between basins. The higher $$^{239+240}$$Pu/$$^{137}$$Cs ratios in the western Japan Basin were derived by the production of Pu-enriched particle in the surface layer and effective sinking of particulate materials in this region. In the marginal Yamato Basin and the Ulleung Basin, both inventories and $$^{239+240}$$Pu/$$^{137}$$Cs ratios in sediment were larger than those in the central Yamato Basin. In the eastern/southern Japan Sea, it was suggested that the supply of particulate radionuclides by the TWC enhanced accumulation of radionuclides in this region.

JAEA Reports

Research on radioactivity in marine off Rokkasho village of Aomori prefecture

Yamamoto, Tadatoshi; Gunji, Katsubumi; *

JAERI-Research 98-072, 21 Pages, 1998/12

JAERI-Research-98-072.pdf:1.19MB

no abstracts in English

JAEA Reports

None

PNC TJ1621 94-001, 111 Pages, 1994/03

PNC-TJ1621-94-001.pdf:3.27MB

no abstracts in English

JAEA Reports

Radioactive nuclides in the living environment

*; Hoshi, Michio

JAERI-M 93-161, 25 Pages, 1993/09

JAERI-M-93-161.pdf:0.67MB

no abstracts in English

JAEA Reports

None

PNC TJ1621 93-001, 76 Pages, 1993/03

PNC-TJ1621-93-001.pdf:1.99MB

no abstracts in English

Oral presentation

Distribution of anthropogenic and natural radionuclides in well, spring and tap water samples collected from Minamisoma City, Fukushima Prefecture, Japan

Tomita, Jumpei; Abe, Takuya; Sakaguchi, Aya*; Miyata, Yoshiki*; Nagao, Seiya*; Yamamoto, Masayoshi*

no journal, , 

no abstracts in English

Oral presentation

Development of emergency monitoring system for radionuclide emitting alpha-ray in the air

Hokama, Tomonori; Fujita, Hiroki; Iimoto, Takeshi*

no journal, , 

It is important to monitor alpha-ray emitting radionuclides in an airborne sample in case of emergency such as nuclear and radiation accidents. However, it was difficult to assess concentrations of their artificial alpha-ray emitting radionuclides because of the abundance of natural radionuclides. In this research, I develop the emergency monitoring system for artificial radionuclides emitting alpha-ray such as plutonium in the air, using survey meter and multiple time interval analysis. The detection limit of this developed monitoring system was 2.5$$times$$10$$^{-8}$$ Bq cm$$^{-3}$$ in concentration of artificial radionuclide in the air.

7 (Records 1-7 displayed on this page)
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