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Journal Articles

Characterization of deformation by cold rolling in ferritic steel containing Cu particles using neutron transmission analysis

Oba, Yojiro; Morooka, Satoshi; Oishi, Kazuki*; Suzuki, Junichi*; Tsuchiyama, Toshihiro*

ISIJ International, 62(1), p.173 - 178, 2022/01

 Times Cited Count:0 Percentile:0.01(Metallurgy & Metallurgical Engineering)

Journal Articles

Energy-resolved small-angle neutron scattering from steel

Oba, Yojiro*; Morooka, Satoshi; Oishi, Kazuki*; Suzuki, Junichi*; Takata, Shinichi; Sato, Nobuhiro*; Inoue, Rintaro*; Tsuchiyama, Toshihiro*; Gilbert, E. P.*; Sugiyama, Masaaki*

Journal of Applied Crystallography, 50(2), p.334 - 339, 2017/04

 Times Cited Count:3 Percentile:33.81(Chemistry, Multidisciplinary)

Journal Articles

Characterization of microstructure using Bragg edge and energy-resolved small-angle neutron scattering

Oba, Yojiro; Morooka, Satoshi; Oishi, Kazuki*; Suzuki, Junichi*; Tsuchiyama, Toshihiro*; Gilbert, E. P.*

Proceedings of 5th International Symposium on Steel Science (ISSS 2017), p.151 - 154, 2017/00

Small-angle neutron scattering and neutron diffraction are powerful tools to characterize microstructures in steels. Several new experimental techniques such as Bragg edge transmission analysis and energy-resolved small-angle neuron scattering have been recently developed with the opening of new-generation pulsed neutron sources. In this talk, the combined use of these diffraction and small-angle scattering techniques are discussed for the total characterization of the microstructures in steels.

Journal Articles

Magnetic scattering in the simultaneous measurement of small-angle neutron scattering and Bragg edge transmission from steel

Oba, Yojiro*; Morooka, Satoshi; Oishi, Kazuki*; Sato, Nobuhiro*; Inoue, Rintaro*; Adachi, Nozomu*; Suzuki, Junichi*; Tsuchiyama, Toshihiro*; Gilbert, E. P.*; Sugiyama, Masaaki*

Journal of Applied Crystallography, 49(5), p.1659 - 1664, 2016/10

 Times Cited Count:11 Percentile:66.99(Chemistry, Multidisciplinary)

JAEA Reports

Test results of the reactor inlet coolant temperature control system of HTTR

Saito, Kenji; Nakagawa, Shigeaki; Hirato, Yoji; Kondo, Makoto; Sawahata, Hiroaki; Tsuchiyama, Masaru*; Ando, Toshio*; Motegi, Toshihiro; Mizushima, Toshihiko; Nakazawa, Toshio

JAERI-Tech 2004-042, 26 Pages, 2004/04

JAERI-Tech-2004-042.pdf:1.16MB

The reactor control system of HTTR is composed of the reactor power control system, the reactor inlet coolant temperature control system, the primary coolant flow rate control system and so on. The reactor control system of HTTR achieves reactor power 30MW, reactor outlet coolant temperature 850$$^{circ}$$C, reactor inlet coolant temperature 395$$^{circ}$$C under the condition that primary coolant flow rate is fixed. In the Rise-to-Power Test, the performance test of the reactor inlet coolant temperature control system was carried out in order to confirm the control capability of this control system. This report shows the test results of performance test. As a result, the control parameters, which can control the reactor inlet coolant temperature stably during the reactor operation, were successfully selected. And it was confirmed that the reactor inlet coolant temperature control system has the capability of controlling the reactor inlet coolant temperature stably against any disturbances on the basis of operational condition of HTTR.

JAEA Reports

Investigation of automatic shutdown of HTTR on May 21st, 2003

Hirato, Yoji; Saito, Kenji; Kondo, Makoto; Sawahata, Hiroaki; Motegi, Toshihiro; Tsuchiyama, Masaru*; Ando, Toshio*; Mizushima, Toshihiko; Nakazawa, Toshio

JAERI-Tech 2004-037, 33 Pages, 2004/04

JAERI-Tech-2004-037.pdf:4.08MB

HTTR (High Temperature Engineering Test Reactor) was operated from May 6th, 2003 to June 18th, 2003 to obtain operation data in parallel loaded operation mode and in safety demonstration tests. Operated with the reactor power at 60% of the rated power on May 21st, HTTR was automatically scrammed by a signalof "Primary coolant flow rate of the Primary Pressurized Water Cooler (PPWC): Low". The cause of the shutdown was the primary gas circulator (A) automatically stopped. The primary coolant flow rate of the PPWC decresed and reached the scram set value due to the gas circulator stop. As a result of investigation, it became clear that the cause of the gas circulator stop was malfunction of an auxiliary relay which monitored electric power of a circuit breaker in power line of the gas circulator. The cause of malfunction was deterioration of the relay under high temperature condition because the relay was installed beside an electric part which was heated up by electricity.

Oral presentation

Plastic deformation behavior of harder and/or softer dispersion second phase containing of steels

Morooka, Satoshi; Oba, Yojiro*; Tsuchiyama, Toshihiro*; Akama, Daichi*; Gilbert, E. P.*

no journal, , 

no abstracts in English

Oral presentation

Characterization of microstructure in steel using simultaneous measurement of neutron diffraction, small-angle neutron scattering, and neutron transmission

Oba, Yojiro; Morooka, Satoshi; Oishi, Kazuki*; Suzuki, Junichi*; Tsuchiyama, Toshihiro*; Gilbert, E. P.*

no journal, , 

Since microstructures of steels are closely related to their mechanical properties, the characterization of the microstructures is important. Neutron scattering techniques are useful for the characterization of the steel and widely utilized. On the other hand, recent development of the neutron transmission analysis enables the characterization of the microstructure using the neutron transmission similar to the conventional neutron scattering measurements. The possibilities of advanced experiments using neutron scattering and transmission measurements are discussed for the characterization of the microstructure.

Oral presentation

Characterization of precipitates and matrix in steel using neutron transmission spectrum

Oba, Yojiro; Morooka, Satoshi; Tsuchiyama, Toshihiro*; Oishi, Kazuki*; Suzuki, Junichi*

no journal, , 

no abstracts in English

Oral presentation

Influence of interstitial elements on micromechanical properties in titanium alloys monitored by in-situ neutron diffraction

Morooka, Satoshi; Tsuchiyama, Toshihiro*; Kawasaki, Takuro; Harjo, S.

no journal, , 

Oral presentation

Deformation behavior of medium manganese steels by neutron diffraction

Morooka, Satoshi; Yamashita, Takayuki; Harjo, S.; Tsuchiyama, Toshihiro*

no journal, , 

no abstracts in English

Oral presentation

Evaluation of inhomogeneous deformation behavior by nano-scale DIC analysis in medium-Mn steel treated with interrupted quenching and intercritical annealing

Masumura, Takuro*; Tsuchiyama, Toshihiro*; Nakagaichi, Tatsuya*; Morooka, Satoshi

no journal, , 

no abstracts in English

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