Annual report on the environmental radiation monitoring around the Tokai Reprocessing Plant FY2019

Nakano, Masanao; Fujii, Tomoko; Nemoto, Masashi; Tobita, Keiji; Seya, Natsumi; Nishimura, Shusaku; Hosomi, Kenji; Nagaoka, Mika; Yokoyama, Hiroya; Matsubara, Natsumi; et al.

JAEA-Review 2020-069, 163 Pages, 2021/02

JAEA-Review-2020-069.pdf:4.78MB

Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed by the Nuclear Fuel Cycle Engineering Laboratories, based on "Safety Regulations for the Reprocessing Plant of Japan Atomic Energy Agency, Chapter IV - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitant due to the radioactivity discharged from the plant to the atmosphere and the sea during April 2019 to March 2020. In this report, some data include the influence of the accidental release from the Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Co., Inc. (the trade name was changed to Tokyo Electric Power Company Holdings, Inc. on April 1, 2016) in March 2011. Appendices present comprehensive information, such as monitoring programs, monitoring methods, monitoring results and their trends, meteorological data and discharged radioactive wastes. In addition, the data which were influenced by the accidental release and exceeded the normal range of fluctuation in the monitoring, were evaluated.

Spin current generation using a surface acoustic wave generated via spin-rotation coupling

Kobayashi, Daima*; Yoshikawa, Tomohide*; Matsuo, Mamoru*; Iguchi, Ryo*; Maekawa, Sadamichi; Saito, Eiji; Nozaki, Yukio*

Physical Review Letters, 119(7), p.077202_1 - 077202_5, 2017/08

https://doi.org/10.1103/PhysRevLett.119.077202

Barnett effect in paramagnetic states

Ono, Masao; Chudo, Hiroyuki; Harii, Kazuya; Okayasu, Satoru; Matsuo, Mamoru; Ieda, Junichi; Takahashi, Ryo*; Maekawa, Sadamichi; Saito, Eiji

Physical Review B, 92(17), p.174424_1 - 174424_4, 2015/11

https://doi.org/10.1103/PhysRevB.92.174424

Isoscalar giant resonances in the Sn nuclei and implications for the asymmetry term in the nuclear-matter incompressibility

Li, T.*; Garg, U.*; Liu, Y.*; Marks, R.*; Nayak, B. K.*; Madhusudhana Rao, P. V.*; Fujiwara, Mamoru*; Hashimoto, Hisanobu*; Nakanishi, Kosuke*; Okumura, Shun*; et al.

Physical Review C, 81(3), p.034309_1 - 034309_11, 2010/03

https://doi.org/10.1103/PhysRevC.81.034309

Induction of thornless Yuzu mutant by heavy ion beam irradiation

Matsuo, Yoichi*; Hase, Yoshihiro; Yoshihara, Ryohei; Narumi, Issei

JAEA-Review 2008-055, JAEA Takasaki Annual Report 2007, P. 74, 2008/11

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2008-055.pdf

no abstracts in English

Induction of thornless Yuzu mutant by heavy ion beam irradiation

Matsuo, Yoichi*; Hase, Yoshihiro; Nozawa, Shigeki; Yoshihara, Ryohei; Yokota, Yuichiro; Narumi, Issei; Oyabu, Eiko*

no journal, , 

no abstracts in English

Successive charge-ordering transition in YFeO

Maeda, Daisuke*; Fukuyama, Ryota*; Kitamura, Satoshi*; Funae, Takeshi*; Matsuo, Yoji*; Ikeda, Naoshi*; Kambe, Takashi*; Kimizuka, Noboru*; Yoshii, Kenji

no journal, , 

We have investigated the successive phase transition in YFeO, which shows charge-ordering-induced ferroelectricity below about 330 K. This material has been reported to show complex phase transitions below 330 K. In this work we have studied the structure and physical properties of YFeO synthesized in a variety of preparation conditions, and have found that slight changes of the conditions led to drastic alternations of physical properties. Details of the results will be shown at the conference.

Intervarieties difference in sensitivity to ion beams in citrus cultivar

Matsuo, Yoichi*; Nozawa, Shigeki; Hase, Yoshihiro; Yoshihara, Ryohei; Narumi, Issei

no journal, , 

no abstracts in English

Structural study of solid solution of protonic conductors RbKH(SeO) by single crystal neutron diffraction

Kiyanagi, Ryoji; Matsuo, Yasumitsu*; Ohara, Takashi; Kawasaki, Takuro; Oikawa, Kenichi; Kaneko, Koji; Tamura, Itaru; Hanashima, Takayasu*; Munakata, Koji*; Nakao, Akiko*; et al.

no journal, , 

The materials represented as MH(XO) is known to exhibit a super protonic conductivity at rather low temperature. The protonic conductivity emerges upon a structural phase transition, and the phase transition temperature varies depending on the elements at M and X. In addition, the protonic conductivity also varies depending on the elements, but the origin has not been uncovered. In order to clarify the relation between the structure and the protonic conductivity including the phase transition mechanism, Solid solutions of super protonic conductors, RbKH(SeO) (x=0, 1, 2, 3), were structurally investigated by single crystal neutron diffraction. The structure analyses showed evident linear relation between the lattice parameters and x. Meanwhile, K was found to preferably reside at one of the two M sites. A apparent relation between the occupancy of K at one site and the transition temperature and the hydrogen-bond length were demonstrated.

Structure analysis and phase transition of super protonic conductor RbKH(SeO)

Kiyanagi, Ryoji; Matsuo, Yasumitsu*; Ohara, Takashi; Kawasaki, Takuro; Oikawa, Kenichi; Kaneko, Koji; Tamura, Itaru; Nakao, Akiko*; Hanashima, Takayasu*; Munakata, Koji*; et al.

no journal, , 

The materials represented as MH(XO) are known to exhibit super protonic conductivity at rather low temperature, but the mechanism of the super protonic phase transition and the protonic conduction have not been clarified. In this study, a mixed material, RbKH(SeO), was investigated by means of conductivity measurements and neutron diffraction. The neutron diffraction experiments were conducted on BL18 at J-PARC/MLF. The conductivity measurements revealed that the phase transition temperature significantly changes below x=2. Meanwhile, the neutron structure analyses revealed that K atoms exclusively occupy one of two non-equivalent sites for M atoms below x=2. These observations are indicative of the close relationship between the phase transition and the internal atomic arrangement.