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Hamada, Noriaki*; Shiina, Koji*; Fujimata, Kazuhiro*; Hayakawa, Satoshi*; Watanabe, Osamu*; Yamano, Hidemasa
Proceedings of International Conference on Fast Reactors and Related Fuel Cycles (FR 2009) (CD-ROM), 10 Pages, 2012/00
In a sodium-cooled fast reactor, a vortex cavitation evaluation methodology was developed to predict a possible cavitation generated by vortex at the center of accelerating flow. This methodology was applied to a scaled model experiment, leading to the prospect that the cavitation can be predicted.
Sato, Atsushi; Shiina, Hidenori; Kataoka, Kentaro*; Otomo, Susumu*; Kakiuchi, Kazuo*; Ohira, Koichi*; Itagaki, Noboru*; Kaminaga, Norihisa; Kimura, Yasuhiko; Suzuki, Kazuhiro; et al.
no journal, ,
Hamada, Noriaki*; Fujimata, Kazuhiro*; Shiina, Koji*; Hayakawa, Satoshi*; Watanabe, Osamu*; Yamano, Hidemasa
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A computational method for predicting vortex cavitation based on the theory of vortex streching was developed to predict possible cavitation generated by vortex at the center of accelerating swirl flow in the reactor vessel in a sodium-cooled fast reactor. This method was applied to a scale model test of a commercial fast reactor, leading to feasibility of this method that can predict the cavitation.
Onuki, Toshihiko; Ebata, Daizo*; Sakamoto, Fuminori; Kozai, Naofumi; Yamasaki, Shinya; Shiina, Kazuhiro; Kanno, Takashi
no journal, ,
Accumulation of Cs in basidiomycetes has been studied by analysis of SEM. The SEM analysis showed that Cs was accumulated in fungal hypha. Elemetal analysis indicated that Cs accumulated in the hypha of Lentinula was higher than K, suggesting high performance of Lentinula for Cs uptake.
Shiina, Kazuhiro; Kanno, Takashi; Sakamoto, Fuminori; Kozai, Naofumi; Yamasaki, Shinya; Onuki, Toshihiko
no journal, ,
We have studied accumulation of radioactive Cs from forest litter. In this report, we grew basidiomycetes in laboratory and in forest litter. The growth of basidiomycetes in the laboratory caused an increase of radioactivity by about 2 times in soil containing hyphae than the soil without hyphae. In the forest litter experiment showed growth of hyphae at present.
Kanno, Takashi; Kozai, Naofumi; Sakamoto, Fuminori; Yamasaki, Shinya; Shiina, Kazuhiro; Onuki, Toshihiko
no journal, ,
In order to clarify the migration behavior of radioactive Cs in the environment, the chemical states of radioactive Cs accumulated on the branches and staminate flower of plants was examined by autoradiography and sequential extraction techniques. The results showed that radioactive Cs concentration depends on the growth time of the branch of a Japan cedar or a staminate flower.
Onuki, Toshihiko; Sakamoto, Fuminori; Kozai, Naofumi; Yamasaki, Shinya; Shiina, Kazuhiro; Kanno, Takashi; Ebata, Daizo*
no journal, ,
no abstracts in English
Sakamoto, Fuminori; Onuki, Toshihiko; Kozai, Naofumi; Neda, Hitoshi*; Kumata, Atsushi*; Shiina, Kazuhiro; Tanaka, Kenji; Namekawa, Jun
no journal, ,
no abstracts in English
Shiina, Kazuhiro; Sakamoto, Fuminori; Onuki, Toshihiko; Kozai, Naofumi; Kumata, Atsushi*; Tanaka, Kenji; Namekawa, Jun
no journal, ,
no abstracts in English
Tanaka, Kenji; Sakamoto, Fuminori; Onuki, Toshihiko; Kozai, Naofumi; Kumata, Atsushi*; Shiina, Kazuhiro; Namekawa, Jun
no journal, ,
no abstracts in English
Tobari, Hiroyuki; Hanada, Masaya; Watanabe, Kazuhiro; Kashiwagi, Mieko; Dairaku, Masayuki; Yamanaka, Haruhiko; Maejima, Tetsuya; Umeda, Naotaka; Abe, Hiroyuki; Terunuma, Yuto; et al.
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JAEA has started procurement activities for ITER NB test facility (NBTF). NBTF being under construction in Padova, Italy has an objective to establish beam technology for 1 MeV, 40 A D- beam prior to ITER operation. JAEA procures high voltage components of 1 MV power supply such as insulating transformer and HV bushing as insulating feedthrough. Requirements to realize those components exceeds existing technology level, hence JAEA has pushed R&D. As for 1 MV insulating transformer, insulating method with double-walled insulator was newly developed. As for the HV bushing, a new forming method of the world largest ceramic ring and brazing technique were developed, and then a technology that meets ITER requirement has been confirmed. Procurement activities have been started from 2012 and now is undergoing as scheduled. Manufacturing of components will be completed by 2015 and those will be transported and installed in Padova in 2016. Commissioning will start in 2017.
Sakamoto, Fuminori; Kozai, Naofumi; Shiina, Kazuhiro; Tanaka, Kenji; Onuki, Toshihiko
no journal, ,
no abstracts in English
Sakamoto, Fuminori; Kozai, Naofumi; Shiina, Kazuhiro; Tanaka, Kenji
no journal, ,
no abstracts in English
Sakamoto, Fuminori; Kozai, Naofumi; Shiina, Kazuhiro; Tanaka, Kenji; Namekawa, Jun; Onuki, Toshihiko
no journal, ,
no abstracts in English
Shiina, Kazuhiro; Sakamoto, Fuminori; Kozai, Naofumi; Tanaka, Kenji; Namekawa, Jun; Onuki, Toshihiko
no journal, ,
no abstracts in English
(Berk.) PeglerTanaka, Kenji; Sakamoto, Fuminori; Kozai, Naofumi; Shiina, Kazuhiro; Namekawa, Jun; Onuki, Toshihiko
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no abstracts in English
Namekawa, Jun; Sakamoto, Fuminori; Kozai, Naofumi; Shiina, Kazuhiro; Tanaka, Kenji; Onuki, Toshihiko
no journal, ,
no abstracts in English
Onuki, Toshihiko; Sakamoto, Fuminori; Kozai, Naofumi; Shiina, Kazuhiro; Tanaka, Kenji; Namekawa, Jun
no journal, ,
Effect of the presence of minerals on the accumulation of radioactive Cs by hyphae of fungi has been studied. In the presence of mineral, radioactivity in the hyphae was less than that without mineral. This result indicates that presence of minerals inhibits the transportation of radioactive Cs from medium to the hyphae.
