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Journal Articles

Pre- and post-accident $$^{14}$$C activities in tree rings near the Fukushima Dai-ichi Nuclear Power Plant

Matsunaka, Tetsuya*; Sasa, Kimikazu*; Takahashi, Tsutomu*; Matsumura, Masumi*; Satou, Yukihiko; Shen, H.*; Sueki, Keisuke*; Matsuzaki, Hiroyuki*

Radiocarbon, 61(6), p.1633 - 1642, 2019/12

https://doi.org/10.1017/RDC.2019.147
 Times Cited Count：2 Percentile：9.95(Geochemistry & Geophysics)

Journal Articles

Depth profile and inventory of $$^{36}$$Cl in soil near the Fukushima Dai-ichi Nuclear Power Plant

Ota, Yuki*; Sueki, Keisuke*; Sasa, Kimikazu*; Takahashi, Tsutomu*; Matsunaka, Tetsuya*; Matsumura, Masumi*; Tosaki, Yuki*; Honda, Maki*; Hosoya, Seiji*; Takano, Kenta*; et al.

JAEA-Conf 2018-002, p.99 - 102, 2019/02

https://doi.org/10.11484/jaea-conf-2018-002

no abstracts in English

Journal Articles

Radiocarbon variations in tree rings since 1960 near the Tokai nuclear facility, Japan

Matsunaka, Tetsuya*; Sasa, Kimikazu*; Takahashi, Tsutomu*; Hosoya, Seiji*; Matsumura, Masumi*; Satou, Yukihiko; Shen, H.*; Sueki, Keisuke*

Nuclear Instruments and Methods in Physics Research B, 439, p.64 - 69, 2019/01

https://doi.org/10.1016/j.nimb.2018.12.009
 Times Cited Count：2 Percentile：21.28(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Radiocarbon variations since 1960 in tree rings around the nuclear facilities of the eastern Japan

Matsunaka, Tetsuya*; Sasa, Kimikazu*; Takahashi, Tsutomu*; Hosoya, Seiji*; Matsumura, Masumi*; Sueki, Keisuke*; Satou, Yukihiko

Dai-19-Kai AMS Shimpojiumu, 2016-Nendo "Jumoku Nenrin" Kenkyukai Kyodo Kaisai Shimpojiumu Hokokushu, p.76 - 79, 2017/06

To evaluate the radiological impact of the atmospheric $$^{14}$$C discharge from the Tokai nuclear facilities, a 80-year-old Japanese pine tree from Tokai, 1.8 km south-southwest of the Tokai Nuclear Power Plants (Tokai NPP and Tokai-2 NPP) and 1.4 km North-Northwest of the Tokai Reprocessing Plant (Tokai RP), was cored and each annual ring was measured for $$^{14}$$C. The $$^{14}$$C specific activities varied from 232.8 Bq kg$$^{-1}$$ C to 403.3Bq kg$$^{-1}$$ C in the tree rings formed during the periods 1954-2013. The specific activities in 1967-2010 are significantly elevated compared with the ambient background values, clearly indicating $$^{14}$$C discharges from the nuclear facilities during their normal operation. The excess $$^{14}$$C activities of 0.5-70.0 Bq kg$$^{-1}$$ C in 1970-2011 are positively correlated with the estimated annual $$^{14}$$C discharges of 0.1-1.2 TBq from Tokai NPP and Tokai-2 NPP with R$$^{2}$$ of 0.66 (n = 38). These activity values of $$<$$ 70.0 Bq kg$$^{-1}$$ C were corresponding to an additional annual effective dose of $$<$$ 3.9 uSv via the food ingestion pathway in the study location.

Oral presentation

Distribution of I-129 in the terrestrial environment after the Fukushima Daiichi Nuclear Power Plant accident

Matsumura, Masumi*; Sasa, Kimikazu*; Matsunaka, Tetsuya*; Tomita, Ryohei; Takahashi, Tsutomu*; Matsuzaki, Hiroyuki*; Sueki, Keisuke*

no journal, , 

Oral presentation

Quantitative analysis of $$^{36}$$Cl in surface soils near the Fukushima Dai-ichi Nuclear Power Plant using accelerator mass spectrometry

Ota, Yuki*; Sueki, Keisuke*; Sasa, Kimikazu*; Takahashi, Tsutomu*; Matsunaka, Tetsuya*; Matsumura, Masumi*; Tosaki, Yuki*; Hosoya, Seiji*; Takano, Kenta*; Ochiai, Yuta*; et al.

no journal, , 

no abstracts in English

Oral presentation

Determination of $$^{125}$$Sb and $$^{129}$$I in radioactive particles derived from FDNPP

Matsuo, Kazuki*; Sueki, Keisuke*; Satou, Yukihiko; Yoshikawa, Hideki; Minowa, Haruka*; Sasa, Kimikazu*; Matsunaka, Tetsuya*; Matsumura, Masumi*; Takahashi, Tsutomu*; Sakaguchi, Aya*

no journal, , 

no abstracts in English

Oral presentation

Cesium isotopic ratio variation about cesium dissolved in river water and included bottom sediment after the FDNPP accident

Tomita, Ryohei*; Matsunaka, Tetsuya*; Honda, Maki*; Satou, Yukihiko; Matsumura, Masumi*; Takahashi, Tsutomu*; Sakaguchi, Aya*; Matsuzaki, Hiroyuki*; Sasa, Kimikazu*; Sueki, Keisuke*

no journal, , 

no abstracts in English

8 (Records 1-8 displayed on this page)
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