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Yoshimura, Kazuo; Doda, Norihiro; Nakamine, Yoshiaki*; Fujisaki, Tatsuya*; Igawa, Kenichi*; Iida, Masaki*; Tanaka, Masaaki
Dai-27-Kai Doryoku, Enerugi Gijutsu Shimpojiumu Koen Rombunshu (Internet), 5 Pages, 2023/09
In Japan Atomic Energy Agency, a virtual plant model of the sodium-cooled fast reactor plant composed in a computer is being developed to reduce the development cost, by replacing the experiments to the numerical simulations with coupled analyses of the physical phenomena accounting for the interaction between components under various plant conditions. Through the numerical analysis of the ULOHS test in the U.S. experimental fast reactor named EBR-II, applicability of the virtual plant model was confirmed in comparison with the measured data including the core inlet temperature and the reactor power.
Kambara, Toyozo; Uno, Hidero; Shoda, Katsuhiko; Hirata, Yutaka; Shoji, Tsutomu; Kohayakawa, Toru; Takayanagi, Hiroshi; Fujimura, Tsutomu; Morita, Morito; Ichihara, Masahiro; et al.
JAERI 1045, 11 Pages, 1963/03
no abstracts in English
Makida, Yasuhiro*; Iida, Masahisa*; Ohata, Hirokatsu*; Okamura, Takahiro*; Ogitsu, Toru*; Kimura, Nobuhiro*; Tanaka, Kenichi*; Nakamoto, Tatsushi*; Yamamoto, Akira*; Idesaki, Akira; et al.
no journal, ,
A Superconducting magnet system will be adopted for the J-PARC neutrino beam line. Since the magnet system will be exposed to high radiation field, the radiation resistance of a cryostat is very important. We have developed radio-proof control valve and relief valve by selection of some parts and separation of the positioner. In this work, the developed valves were worked under the 
ray irradiation, and it was found that the valves show the radiation resistance above 1MGy.
Hattori, Takanori; Sano, Asami; Machida, Shinichi*; Abe, Jun*; Funakoshi, Kenichi*; Nakamura, Mitsutaka; Iida, Kazuki*; Kawamura, Seiko; Shibata, Kaoru; Yamada, Takeshi*; et al.
no journal, ,
So far, high-pressure experiments using neutrons were limited due to the incompatible nature of limited neutron flux with tiny high-pressure sample. Intense neutron source of J-PARC is about to change the situation. In this talk, I will introduce the high-pressure diffraction beamline PLANET and recent results. And also, I will show you resent challenges to expand high-pressure activity to other experimental techniques, such as small angles scattering, quasi elastic scattering, and inelastic scattering.
Hattori, Takanori; Sano, Asami; Machida, Shinichi*; Abe, Jun*; Funakoshi, Kenichi*; Nakamura, Mitsutaka; Iida, Kazuki*; Shibata, Kaoru; Yamada, Takeshi*; Oishi, Kazuki*; et al.
no journal, ,
So far, high-pressure experiments using neutrons were limited due to the incompatible nature of limited neutron flux with tiny high-pressure sample. Intense neutron source of J-PARC is about to change the situation. In this talk, I will introduce the high-pressure diffraction beamline PLANET and recent results. And also, I will show you resent challenges to expand high-pressure activity to other experimental techniques, such as small angles scattering, quasi elastic scattering, and inelastic scattering.
Hattori, Takanori; Sano, Asami; Machida, Shinichi*; Arima, Hiroshi*; Abe, Jun*; Funakoshi, Kenichi*; Nakamura, Mitsutaka; Iida, Kazuki*; Kawamura, Seiko
no journal, ,
So far, high-pressure experiments using neutrons were limited due to the incompatible nature of limited neutron flux with tiny high-pressure sample. Intense neutron source of J-PARC is about to change the situation. In this talk, I will introduce the high-pressure diffraction beamline PLANET and recent results. And also, I will show you resent challenges to expand high-pressure activity to other experimental techniques, such as small angles scattering, quasi elastic scattering, and inelastic scattering.
Nakamura, Mitsutaka; Kajimoto, Ryoichi; Oikawa, Kenichi; Shinohara, Takenao; Aizawa, Kazuya; Harjo, S.; Iwahashi, Takaaki*; Kamazawa, Kazuya*; Ikeuchi, Kazuhiko*; Iida, Kazuki*; et al.
no journal, ,
We have introduced a new Fermi chopper with compact slit package into the direct geometry neutron spectrometer 4SEASONS in Materials and Life Science Experimental Facility at J-PARC, and succeeded in significantly improving the beam intensity compared to the old model. On the other hand, the new Fermi chopper causes an unexpected intensity tail, which may adversely affects the data analysis. In order to solve this problem, we have proceeded with various inspections of a Fermi chopper blade such as Monte Carlo simulation, neutron transmission spectrum measurement and direct observation with a microscope. In this presentation, we will show some approaches taken to solve the problem and explain the rationale that led to the plausible assumption.
Hattori, Takanori; Sano, Asami; Machida, Shinichi*; Abe, Jun*; Funakoshi, Kenichi*; Arima, Hiroshi*; Nakamura, Mitsutaka; Iida, Kazuki*; Yamada, Takeshi*; Oishi, Kazuki*; et al.
no journal, ,
Twelve years have passed since the J-PARC distributed the first beam, and six years have passed since the high-pressure diffraction beamtime PLANET started user program. In this period, we have made efforts to extend accessible PT range, improve data quality, and introduce high-pressure technique to other neutron scattering, such as inelastic (INS), quasielastic (QENS) and small-angle scattering experiments (SANS). In this talk, I will introduce recent developments and research outcomes.
