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Journal Articles

FEMAXI-7 prediction of the behavior of BWR-type accident tolerant fuel rod with FeCrAl-ODS steel cladding in normal condition

Yamaji, Akifumi*; Yamasaki, Daiki*; Okada, Tomoya*; Sakamoto, Kan*; Yamashita, Shinichiro

Proceedings of 2017 Water Reactor Fuel Performance Meeting (WRFPM 2017) (USB Flash Drive), 10 Pages, 2017/09

Features of the accident tolerant fuel performance were evaluated with FEMAXI-7 when the current Zircaloy(Zry) cladding is replaced with FeCrAl-ODS steel cladding (a type of oxide dispersion strengthened steel being developed under the Project on Development of Technical Basis for Safety Improvement at Nuclear Power Plants by Ministry of Economy, Trade and Industry (METI) of Japan) for BWR 9$$times$$9 type fuel rod. In particular, influences of the creep strain rate and thickness of the ODS cladding on the fuel temperature, fission gas release rate (FGR) and pellet-cladding mechanical interaction (PCMI) are investigated.

Journal Articles

Crystallization and preliminary neutron diffraction studies of HIV-1 protease cocrystallized with inhibitor KNI-272

Matsumura, Hiroyoshi*; Adachi, Motoyasu; Sugiyama, Shigeru*; Okada, Shino*; Yamakami, Megumi*; Tamada, Taro; Hidaka, Koshi*; Hayashi, Yoshio*; Kimura, Toru*; Kiso, Yoshiaki*; et al.

Acta Crystallographica Section F, 64(11), p.1003 - 1006, 2008/11

 Times Cited Count:16 Percentile:78.13(Biochemical Research Methods)

This paper reports the crystallization and preliminary neutron diffraction measurements of HIV-1 protease, a potential target for anti-HIV therapy, complexed with an inhibitor (KNI-272). The aim of this neutron diffraction study is to obtain structural information about the H atoms and to determine the protonation states of the residues within the active site. The crystal was grown to a size of 1.4 mm$$^{3}$$ by repeated macroseeding and a slow-cooling method using a two-liquid system. Neutron diffraction data were collected at room temperature using a BIX-4 diffractometer at the JRR-3 research reactor of the Japan Atomic Energy Agency (JAEA). The data set was integrated and scaled to 2.3 ${AA}$ resolution in space group P2(1)2(1)2, with unit-cell parameters a = 59.5, b = 87.4, c = 46.8 ${AA}$.

Oral presentation

Relationship between residual stress and recrystallization in aluminum single crystal

Shiro, Ayumi; Shobu, Takahisa; Okada, Tatsuya*; Kawano, Tomoya*; Bunya, Hirotomo*

no journal, , 

no abstracts in English

Oral presentation

Relationship between residual stress and recrystallization in aluminum single crystal

Shiro, Ayumi; Shobu, Takahisa; Okada, Tatsuya*; Kawano, Tomoya*; Bunya, Hirotomo*

no journal, , 

Oral presentation

Laser-driven proton generation from a thin-foil target with a high-intensity laser

Sagisaka, Akito; Nishiuchi, Mamiko; Pirozhkov, A. S.; Ogura, Koichi; Sakaki, Hironao; Maeda, Shota; Pikuz, T.; Faenov, A. Ya.*; Fukuda, Yuji; Yogo, Akifumi; et al.

no journal, , 

High-intensity laser and thin-foil interactions produce high-energy particles, hard X-ray, high-order harmonics, and terahertz radiation. A proton beam driven by a high-intensity laser has received attention as a compact ion source for medical and other applications. We have performed several high intensity laser-matter interaction experiments using a thin-foil target irradiated by Ti:sapphire laser (J-KAREN) at JAEA. The pulse duration was typically $$sim$$ 40 fs (FWHM). The electron density profiles of the preformed plasma were observed with the interferometer. The high temporal contrast laser system could reduce the preformed plasma. The maximum proton energy gradually increased as the laser performance improved and finally protons of $$sim$$ 40 MeV energy were observed at the peak laser intensity of $$sim$$ 1 $$times$$ 10$$^{21}$$ W/cm$$^{2}$$.

Oral presentation

${it In-situ}$ measurement of lattice strain under plastic deformation in Aluminum single crystal

Shiro, Ayumi; Shobu, Takahisa; Okada, Tatsuya*; Kawano, Tomoya*; Bunya, Hirotomo*

no journal, , 

Aluminum single crystals deformed along the $$<$$111$$>$$ direction exhibit a macroscopically uniform multiple-slip without deformation bands. In a previous study, it was found that the residual strain of Al single crystal deformed to a tensile strain of 8% to the $$<$$111$$>$$ direction is very small. In this study, in order to clarify the strain distribution under tensile deformation, we carried out the ${it in-situ}$ measurement using 2-dimensional detector. As a result, it was found as follows: (1) The width of diffraction spots were broadening as a plastic deformation was large. (2) Three subcrystals existed in the aluminum single crystal, and each subcrystal has different strain. (3) The relationship between the width of diffraction spot and formation behavior of the internal dislocation substructure existed.

Oral presentation

Laser driven ion acceleration experiment by high contrast high intensity laser J-KAREN system

Nishiuchi, Mamiko; Sakaki, Hironao; Sagisaka, Akito; Maeda, Shota; Pirozhkov, A. S.; Pikuz, T.; Faenov, A. Ya.*; Ogura, Koichi; Fukuda, Yuji; Matsukawa, Kenya*; et al.

no journal, , 

no abstracts in English

Oral presentation

Measurement of electron spectrum generated by irradiating thin-Foil target with Ultra-intense Ultra-short pulse laser

Maeda, Shota; Nishiuchi, Mamiko; Sakaki, Hironao; Sagisaka, Akito; Pirozhkov, A. S.; Pikuz, T.; Faenov, A. Ya.*; Ogura, Koichi; Fukuda, Yuji; Matsukawa, Kenya*; et al.

no journal, , 

In JAEA, the high energy ions generated by the interaction between Ultra-intense Ultra-Short pulse laser and thin-foil target is being studied. Irradiating condition must be optimized to generate higher energy ions while suppress the becoming gigantic of laser. It is necessary to know the physical phenomenon in plasma to determine the parameter to optimize from the information on the electron and neutron, X-rays, which are generated simultaneously with ion. In this study, in order to measure electron temperature accurately, an electron spectrometer was developed which have broad range (1-200 MeV). The detector is comprised of permanent magnets and a fluorescent plate, CCD camera. In the presentation, the result of the calibration experiment carried out using 4, 9, 12, 15 MeV quasi-monoenergetic electron beam in HIBMC will be reported. Moreover, response analysis method was inspected using PHITS which is particle transporting Monte Carlo simulation code, and will also report the result.

Oral presentation

Laser-driven proton acceleration with a thin-foil target

Sagisaka, Akito; Nishiuchi, Mamiko; Pirozhkov, A. S.; Ogura, Koichi; Sakaki, Hironao; Maeda, Shota; Pikuz, T.; Faenov, A. Y.*; Fukuda, Yuji; Kanasaki, Masato; et al.

no journal, , 

High-intensity laser and thin-foil interactions produce high-energy particles, hard X-ray, high-order harmonics, and terahertz radiation. A proton beam driven by a high-intensity laser has received attention as a compact ion source for medical and other applications. We have performed several high intensity laser-matter interaction experiments using a thin-foil target irradiated by Ti:sapphire laser (J-KAREN) at JAEA. The pulse duration was typically $$sim$$40 fs (FWHM). The high-order harmonics (2nd$$sim$$4th) were observed with the spectrometer in the reflected direction. The maximum proton energy of $$sim$$40 MeV energy were observed at the peak laser intensity of $$sim$$1$$times$$10$$^{21}$$W/cm$$^{2}$$.

Oral presentation

Evaluation of strain and crystallographic property of $$<$$111$$>$$ aluminum single crystal using synchrotron radiation

Shiro, Ayumi; Okada, Tatsuya*; Kawano, Tomoya*; Sato, Takafumi*; Shobu, Takahisa

no journal, , 

no abstracts in English

Oral presentation

Proton generation from a thin-foil target with a high-intensity laser

Sagisaka, Akito; Nishiuchi, Mamiko; Pirozhkov, A. S.; Ogura, Koichi; Sakaki, Hironao; Maeda, Shota*; Pikuz, T.; Faenov, A. Ya.*; Fukuda, Yuji; Kanasaki, Masato*; et al.

no journal, , 

High-intensity laser and thin-foil interactions produce high-energy particles, hard X-ray, high-order harmonics, and terahertz radiation. A proton beam driven by a high-intensity laser has received attention as a compact ion source for medical and other applications. We have performed several high intensity laser-matter interaction experiments using a thin-foil target irradiated by Ti:sapphire laser (J-KAREN) at JAEA. The pulse duration was typically $$sim$$40 fs (FWHM). The high-order harmonics (2nd $$sim$$ 4th) were observed with the spectrometer in the reflected direction. The maximum proton energy of $$sim$$40 MeV energy were observed at the peak laser intensity of $$sim$$1$$times$$10$$^{21}$$ W/cm$$^{2}$$.

11 (Records 1-11 displayed on this page)
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