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JAEA Reports

Soundness survey of cooling tower of Utility Cooling Loop (UCL Cooling Tower) in JMTR

Oto, Tsutomu; Asano, Norikazu; Kawamata, Takanori; Yanai, Tomohiro; Nishimura, Arashi; Araki, Daisuke; Otsuka, Kaoru; Takabe, Yugo; Otsuka, Noriaki; Kojima, Keidai; et al.

JAEA-Review 2020-018, 66 Pages, 2020/11

JAEA-Review-2020-018.pdf:8.87MB

A collapse event of the cooling tower of secondary cooling system in the JMTR (Japan Materials Testing Reactor) was caused by the strong wind of Typhoon No.15 on September 9, 2019. The cause of the collapse of the cooling tower was investigated and analyzed. As the result, it was identified that four causes occurred in combination. Thus, the soundness of the cooling tower of Utility Cooling Loop (UCL cooling tower), which is a wooden cooling tower installed at the same period as the cooling tower of secondary cooling system, was investigated. The items of soundness survey are to grasp the operation conditions of the UCL cooling tower, to confirm the degradation of structural materials, the inspection items and inspection status of the UCL cooling tower, and to investigate the past meteorological data. As the results of soundness survey of the UCL cooling tower, the improvement of inspection items of the UCL cooling tower was carried out and the replacement and repair of the structural materials of the UCL cooling tower were planned for safe maintenance and management of this facility. And the renewal plan of new cooling tower was created to replace the existing UCL cooling tower. This report is summarized the soundness survey of the UCL cooling tower.

Journal Articles

Frontline of R&D for decommissioning and waste disposal, 1; R&D for processing and disposal of low-level radioactive waste and closure of uranium mine

Tsuji, Tomoyuki; Sugitsue, Noritake; Sato, Fuminori; Matsushima, Ryotatsu; Kataoka, Shoji; Okada, Shota; Sasaki, Toshiki; Inoue, Junya

Nihon Genshiryoku Gakkai-Shi ATOMO$$Sigma$$, 62(11), p.658 - 663, 2020/11

no abstracts in English

Journal Articles

Numerical experiments by saturated-unsaturated flow inversion for permeability and boundary conditions of multi-layers aquifer

Inoue, Junya; Masumoto, Kiyoshi*

Doboku Gakkai Rombunshu, A2 (Oyo Rikigaku) (Internet), 74(2), p.I_55 - I_64, 2019/01

Saturated-unsaturated flow inversion program with adjoint method and least norm method was made to estimate saturated hydraulic conductivity and boundary conditions for multi-layers heterogeneous aquifer model. Vertical two dimensional numerical experiments assuming inclined ground consisting of three layers with different permeability were carried out using this program. Some inversion were carried out by changing the coefficient of least norm term to investigate the strength of constraints on the un-known parameters based on the reference value. The result show that it is possible to estimate the unique value of saturated hydraulic conductivity and boundary conditions for multi-layers heterogeneous aquifer model by the method.

Journal Articles

High stereographic resolution texture and residual stress evaluation using time-of-flight neutron diffraction

Xu, P. G.; Harjo, S.; Ojima, Mayumi*; Suzuki, Hiroshi; Ito, Takayoshi*; Gong, W.; Vogel, S. C.*; Inoue, Junya*; Tomota, Yo*; Aizawa, Kazuya; et al.

Journal of Applied Crystallography, 51(3), p.746 - 760, 2018/06

 Times Cited Count:18 Percentile:92.35(Chemistry, Multidisciplinary)

Journal Articles

Local deformation analysis in martensite layer of high-strength multilayered steel composite using synchrotron X-ray diffraction

Ojima, Mayumi*; Shiro, Ayumi*; Suzuki, Hiroshi; Inoue, Junya*; Shobu, Takahisa; Xu, P. G.; Akita, Koichi; Nambu, Shoichi*; Koseki, Toshihiko*

Zairyo, 66(6), p.420 - 426, 2017/06

Journal Articles

Stress partitioning behavior of multilayered steels during tensile deformation measured by in situ neutron diffraction

Ojima, Mayumi*; Inoue, Junya*; Nambu, Shoichi*; Xu, P. G.; Akita, Koichi; Suzuki, Hiroshi; Koseki, Toshihiko*

Scripta Materialia, 66(3-4), p.139 - 142, 2012/02

 Times Cited Count:49 Percentile:92.71(Nanoscience & Nanotechnology)

JAEA Reports

Reactor dynamics experiment of nuclear ship Mutsu using pseudo random signal, (III); The third experiment

Hayashi, Koji; Shimazaki, Junya; Nabeshima, Kunihiko; Shinohara, Yoshikuni; Inoue, Kimio*;

JAERI-Research 95-015, 172 Pages, 1995/03

JAERI-Research-95-015.pdf:4.53MB

no abstracts in English

JAEA Reports

Reactor dynamics experiment of nuclear ship Mutsu using pseudo random signal, II; The second experiment

Hayashi, Koji; Shimazaki, Junya; Nabeshima, Kunihiko; Shinohara, Yoshikuni; Inoue, Kimio*;

JAERI-Research 95-004, 178 Pages, 1995/01

JAERI-Research-95-004.pdf:4.66MB

no abstracts in English

JAEA Reports

Reactor dynamics experiment of N.S.Mutsu using pseudo random signal, I; The First experiment

Hayashi, Koji; Shimazaki, Junya; Nabeshima, Kunihiko; Shinohara, Yoshikuni; Inoue, Kimio*;

JAERI-M 93-194, 163 Pages, 1993/10

JAERI-M-93-194.pdf:4.63MB

no abstracts in English

Oral presentation

Optimization of multiphase textures measured by neutron diffraction

Xu, P. G.; Vogel, S. C.*; Suzuki, Hiroshi; Metoki, Naoto; Nambu, Shoichi*; Inoue, Junya*; Akita, Koichi

no journal, , 

The crystallographic textures of high strength austenite-martensite laminated steel were measured with different neutron diffractometers. The comparison of orientation distribution functions (ODFs) showed that the Gaussian integrated intensities obtained from partially overlapping peaks were reliable to calculate the multiphase textures. Collimator optimized parallel neutron beam and good background correction enabled peak maximum intensities from non-overlapping peaks suitable to evaluate the multiphase textures.

Oral presentation

Comparison and optimization of texture evaluation techniques based on angle dispersive neutron diffraction and time-of-flight neutron diffraction

Xu, P. G.; Suzuki, Hiroshi; Metoki, Naoto; Akita, Koichi; Vogel, S. C.*; Nambu, Shoichi*; Inoue, Junya*

no journal, , 

Oral presentation

Stress partitioning behavior of multilayered steels measured by in situ neutron diffraction during tensile deformation

Ojima, Mayumi*; Inoue, Junya*; Nambu, Shoichi*; Koseki, Toshihiko*; Xu, P. G.; Akita, Koichi; Suzuki, Hiroshi

no journal, , 

no abstracts in English

Oral presentation

Microstructure evaluation of multilayered steel after tensile deformation

Xu, P. G.; Akita, Koichi; Suzuki, Hiroshi; Ojima, Mayumi*; Nambu, Shoichi*; Inoue, Junya*; Koseki, Toshihiko*

no journal, , 

Oral presentation

Deformation behavior of laminated steels consisting of austenite and quenched martensite characterized by synchrotron radiation diffraction

Ojima, Mayumi*; Inoue, Junya*; Nambu, Shoichi*; Koseki, Toshihiko*; Xu, P. G.; Akita, Koichi; Suzuki, Hiroshi; Shobu, Takahisa; Shiro, Ayumi; Zhang, S.

no journal, , 

no abstracts in English

Oral presentation

Strain and texture evaluation of multilayered steel after tensile deformation

Xu, P. G.; Akita, Koichi; Suzuki, Hiroshi; Ojima, Mayumi*; Inoue, Junya*; Nambu, Shoichi*; Vogel, S. C.*; Koseki, Toshihiko*

no journal, , 

Oral presentation

Evaluation of the internal strain in multilayered steel composite using white X-ray

Shiro, Ayumi; Shobu, Takahisa; Suzuki, Hiroshi; Ojima, Mayumi*; Nambu, Shoichi*; Inoue, Junya*

no journal, , 

no abstracts in English

Oral presentation

Martensite tensile deformation and bulk texture evolution in austenite-martensite multilayered steel by neutron diffraction

Xu, P. G.; Ojima, Mayumi*; Inoue, Junya*; Shiro, Ayumi; Akita, Koichi; Nambu, Shoichi*; Suzuki, Hiroshi; Harjo, S.; Gong, W.; Tomota, Yo; et al.

no journal, , 

Oral presentation

Distribution of strain in multilayered steel sheet during tensile deformation

Ojima, Mayumi*; Inoue, Junya*; Anto, Fuka*; Nambu, Shoichi*; Koseki, Toshihiko*; Xu, P. G.; Shiro, Ayumi; Akita, Koichi; Shobu, Takahisa; Suzuki, Hiroshi

no journal, , 

no abstracts in English

Oral presentation

MHD simulation of locked mode and its active stabilization scheme by external field effects

Inoue, Shizuo; Shiraishi, Junya; Ide, Shunsuke; Isayama, Akihiko; Matsunaga, Go; Takechi, Manabu

no journal, , 

no abstracts in English

Oral presentation

Status of the ITER plasma modeling activities in JAEA

Shiraishi, Junya; Honda, Mitsuru; Hayashi, Nobuhiko; Aiba, Nobuyuki; Toma, Mitsunori; Matsuyama, Akinobu; Naito, Osamu; Miyata, Yoshiaki; Inoue, Shizuo; Narita, Emi; et al.

no journal, , 

no abstracts in English

34 (Records 1-20 displayed on this page)