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Journal Articles

Decommissioning program and future plan for Research Hot Laboratory, 2

Koya, Toshio; Nozawa, Yukio; Hanada, Yasushi; Ono, Katsuto; Kanazawa, Hiroyuki; Nihei, Yasuo; Owada, Isao

Dekomisshoningu Giho, (42), p.41 - 48, 2010/09

http://www.randec.or.jp/publish/documents/gihou/Decommissioning%20gihou_42.pdf

The Research Hot Laboratory (RHL) in Japan Atomic Energy Agency (JAEA) had been contributed to R&D program for fuels and nuclear materials in or out of JAEA. However, the decommissioning work of RHL has been started on April 2003 as the rationalization program for decrepit facilities in former Tokai institute. This work will be progressing, dismantling the lead cells and decontamination of concrete caves then release in the regulation of controlled area. The partial area of RHL will be used for the central storage of un- irradiated fuel and for temporary storage of radioactive device generated by J-PARC. The 18 lead cells had been dismantled and the preparing work for remained 20 lead cells has been finished including the removal of the applause from the cells, survey of the contamination revel in the lead cells and prediction of radio active waste. The future plan of decommissioning work has been prepared to incarnate the basic vision and dismantling procedure.

Journal Articles

High-magnetic-field X-ray absorption spectroscopy of field-induced valence transition in EuNi$$_2$$(Si$$_{1-x}$$Ge$$_x$$)$$_2$$

Matsuda, Yasuhiro*; Inami, Toshiya; Owada, Kenji; Murata, Yuto*; Nojiri, Hiroyuki*; Murakami, Yoichi*; Mitsuda, Akihiro*; Wada, Hirofumi*; Miyazaki, Hiroshi*; Harada, Isao*

Journal of the Physical Society of Japan, 77(5), p.054713_1 - 054713_7, 2008/05

https://doi.org/10.1143/JPSJ.77.054713
 Times Cited Count：26 Percentile：74.66(Physics, Multidisciplinary)

The magnetic-field-induced valence transition in EuNi$$_2$$(Si$$_{1-x}$$Ge$$_x$$)$$_2$$ (x=0.82, 0.85) has been studied by X-ray absorption spectroscopy at low temperatures. The field dependence of the Eu valence is directly observed for the first time. We find a significant decrease in the valences at high magnetic fields above 40 T. The valence of Eu changes from v = 2.75 at a zero field to v = 2.33 at 40 T for x = 0.82. The results are analyzed using a theoretical model. The hybridization parameter V between the Eu$$^{2+}$$ and Eu$$^{3+}$$ states and the energy separation $$Delta$$$$E$$ are determined, which are crucial for quantum mechanical mixing.

Oral presentation

Status of PIEs in the Department of Hot Laboratories and Facilities

Matsui, Hiroki; Honda, Junichi; Ono, Katsuto; Kitagawa, Isamu; Owada, Isao; Kikuchi, Hiroyuki

no journal, , 

Oral presentation

Inspection and repair techniques in reactor vessel of sodium cooled fast reactor, 9-6; Development of in-vessel observation techniques for UCS replacement

Sasaki, Jun; Okuda, Eiji; Suzuki, Nobuhiro; Ota, Katsu; Owada, Ryohei; Takamatsu, Misao

no journal, , 

no abstracts in English

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