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Furuya, Osamu*; Fujita, Satoshi*; Muta, Hitoshi*; Otori, Yasuki*; Itoi, Tatsuya*; Okamura, Shigeki*; Minagawa, Keisuke*; Nakamura, Izumi*; Fujimoto, Shigeru*; Otani, Akihito*; et al.
Proceedings of ASME 2021 Pressure Vessels and Piping Conference (PVP 2021) (Internet), 6 Pages, 2021/07
Since the Fukushima accident, with the higher safety requirements of nuclear facilities in Japan, suppliers, manufacturers and academic societies have been actively considering the reconstruction of the safety of nuclear facilities from various perspectives. The Nuclear Regulation Authority has formulated new regulatory standards and is in operation. The new regulatory standards are based on defense in depth, and have significantly raised the levels of natural hazards and have requested to strengthen the countermeasures from the perspective of preventing the simultaneous loss of safety functions due to common factors. Facilities for dealing with specific serious accidents are required to have robustness to ensure functions against earthquakes that exceed the design standards to a certain extent. In addition, since the probabilistic risk assessment (PRA) and the safety margin evaluation are performed to include the range beyond the design assumption in the safety improvement evaluation, it is very important to extent the special knowledge in the strength of important equipment for seismic safety. This paper summarizes the research and examination results of specialized knowledge on the concept of maintaining the functions of important seismic facilities and the damage index to be considered by severe earthquakes. In the other paper, the study on reliability of seismic capacity analysis for important equipment in nuclear facilities will be reported.
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by 
inelastic neutron scattering and their reactivity with ethyleneYamazoe, Seiji*; Yamamoto, Akira*; Hosokawa, Saburo*; Fukuda, Ryoichi*; Hara, Kenji*; Nakamura, Mitsutaka; Kamazawa, Kazuya*; Tsukuda, Tatsuya*; Yoshida, Hisao*; Tanaka, Tsunehiro*
Catalysis Science & Technology, 11(1), p.116 - 123, 2021/01
Times Cited Count：6 Percentile：32.25(Chemistry, Physical)Wada, Yuki*; Enoto, Teruaki*; Nakamura, Yoshitaka*; Furuta, Yoshihiro; Yuasa, Takayuki*; Nakazawa, Kazuhiro*; Morimoto, Takeshi*; Sato, Mitsuteru*; Matsumoto, Takahiro*; Yonetoku, Daisuke*; et al.
Communications Physics (Internet), 2(1), p.67_1 - 67_9, 2019/06
Times Cited Count：49 Percentile：92.92(Physics, Multidisciplinary)Itoi, Tatsuya*; Iwaki, Chikako*; Onuki, Akira*; Kito, Kazuaki*; Nakamura, Hideo; Nishida, Akemi; Nishi, Yoshihisa*
Nihon Genshiryoku Gakkai-Shi ATOMO
, 60(4), p.221 - 225, 2018/04
no abstracts in English
Itoi, Tatsuya*; Nakamura, Hideo; Nakanishi, Nobuhiro*
Nihon Genshiryoku Gakkai-Shi ATOMO, 58(5), p.318 - 323, 2016/05
no abstracts in English
Hwang, J.-G.*; Kim, E.-S.*; Miyajima, Tsukasa*; Honda, Yosuke*; Harada, Kentaro*; Shimada, Miho*; Takai, Ryota*; Kume, Tatsuya*; Nagahashi, Shinya*; Obina, Takashi*; et al.
Nuclear Instruments and Methods in Physics Research A, 753, p.97 - 104, 2014/07
Times Cited Count：7 Percentile：48.01(Instruments & Instrumentation)Shamoto, Shinichi; Kajimoto, Ryoichi; Ishikado, Motoyuki*; Yamakawa, Yoichi*; Watashige, Tatsuya*; Kasahara, Shigeru*; Nakamura, Mitsutaka; Kontani, Hiroshi*; Shibauchi, Takasada*; Matsuda, Yuji*
no journal, ,
no abstracts in English
-FeSeShamoto, Shinichi; Mori, Michiyasu; Kajimoto, Ryoichi; Kodama, Katsuaki; Ishikado, Motoyuki*; Watashige, Tatsuya*; Kasahara, Shigeru*; Nakamura, Mitsutaka; Shibauchi, Takasada*; Matsuda, Yuji*
no journal, ,
Iron-based superconductor -FeSe has not been studied in the high energy region by inelastic neutron scattering measurement. We have studied it with the single crystals grown by chemical vapor transport method. As a result, spin-wave like dispersion, which can be fitted by two types of anisotropic exchange interactions, is observed up to 200 meV.
-FeSi/Si nano-composite phases by IR absorption measurementsMorita, Kosuke*; Nakamura, Tatsuya*; Kobayashi, Hiroyuki*; Tatsumi, Takahide*; Narumi, Kazumasa; Maeda, Yoshihito
no journal, ,
no abstracts in English
-FeSi nanocrystals embedded in SiOTatsumi, Takahide*; Nakamura, Tatsuya*; Morita, Kosuke*; Kobayashi, Hiroyuki*; Narumi, Kazumasa; Maeda, Yoshihito
no journal, ,
no abstracts in English
Te and FeSe; Nematic effect of magnetic scattering spectraShamoto, Shinichi; Kodama, Katsuaki; Kajimoto, Ryoichi; Nakamura, Mitsutaka; Ishikado, Motoyuki*; Watashige, Tatsuya*; Kasahara, Shigeru*; Matsuda, Yuji*; Shibauchi, Takasada*; Arai, Masatoshi*
no journal, ,
Iron-based superconductors FeSeTe and FeSe have been studied by inelastic neutron scattering measurement. In contrast of FeSe, FeSeTe exhibits temperature dependent incommensurability in magnetic spectrum with no clear structural transition. We find a jump in the incommensurability at about 70 K.
Te5 and FeSeShamoto, Shinichi; Ishikado, Motoyuki*; Watashige, Tatsuya*; Kasahara, Shigeru*; Kodama, Katsuaki; Kajimoto, Ryoichi; Nakamura, Mitsutaka; Shibauchi, Takasada*; Matsuda, Yuji*; Arai, Masatoshi*
no journal, ,
Iron-based superconductors FeSeTe and FeSe have been studied by inelastic neutron scattering measurement. Although FeSeTe does not exhibit any clear structural transition, the incommensurate magnetic excitation shows a jump at about 70 K in the incommensurability. It may suggest that the degeneracy of d
and d
orbitals in FeSeTe is lifted in this temperature range. It can be due to the nematic effect even in FeSeTe.
Kanazawa, Nobuyuki; Nakamura, Keisuke; Miyauchi, Toru; Chikazawa, Tatsuya*; Kurosawa, Hideaki*; Shiba, Kozo
no journal, ,
no abstracts in English
