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JAEA Reports

Interim activity status report of "the group for investigation of reasonable safety assurance based on graded approach" (from September, 2019 to September, 2020)

Yonomoto, Taisuke; Nakashima, Hiroshi*; Sono, Hiroki; Kishimoto, Katsumi; Izawa, Kazuhiko; Kinase, Masami; Osa, Akihiko; Ogawa, Kazuhiko; Horiguchi, Hironori; Inoi, Hiroyuki; et al.

JAEA-Review 2020-056, 51 Pages, 2021/03

JAEA-Review-2020-056.pdf:3.26MB

A group named as "The group for investigation of reasonable safety assurance based on graded approach", which consists of about 10 staffs from Sector of Nuclear Science Research, Safety and Nuclear Security Administration Department, departments for management of nuclear facility, Sector of Nuclear Safety Research and Emergency Preparedness, aims to realize effective graded approach (GA) about management of facilities and regulatory compliance of JAEA. The group started its activities in September, 2019 and has had discussions through 10 meetings and email communications. In the meetings, basic ideas of GA, status of compliance with new regulatory standards at each facility, new inspection system, etc were discussed, while individual investigation at each facility were shared among the members. This report is compiled with expectation that it will help promote rational and effective safety management based on GA by sharing contents of the activity widely inside and outside JAEA.

Journal Articles

New antiferromagnetic order with pressure-induced superconductivity in EuFe$$_2$$As$$_2$$

Ikeda, Shugo*; Tsuchiya, Yu*; Zhang, X.-W.*; Kishimoto, Shunji*; Kikegawa, Takumi*; Yoda, Yoshitaka*; Nakamura, Hiroki; Machida, Masahiko; Glasbrenner, J.*; Kobayashi, Hisao*

Physical Review B, 98(10), p.100502_1 - 100502_6, 2018/09

 Times Cited Count:4 Percentile:26.15(Materials Science, Multidisciplinary)

The interplay between magnetism and superconductivity is one of important subjects to investigate the pairing mechanism in novel superconductors. We have found new coexistence between an antiferromagnetic order in the Fe sublattice and superconductivity of the FeAs-based EuFe$$_2$$As$$_2$$ superconductor in the pressure range from 2.4 to 3.0 GPa by $$^{57}$$Fe nuclear forward scattering (NFS) using a single crystal sample. The magnetic state in the Fe sublattice changes to a new antiferromagnetic one with superconductivity from a stripe-type antiferromagnetic one observed in normal conducting state at 2.7 GPa. Below the superconducting transition temperature, the temperature dependence of $$^{57}$$Fe NFS spectra reveals that the new antiferromagnetic order develops with the superconductivity. This non-trivial coupling of two ordered states in EuFe$$_2$$As$$_2$$ under pressure demonstrates a new and intriguing relationship between magnetism and superconductivity in Fe-based superconductors.

Journal Articles

Silicon avalanche photodiode linear-array detector with multichannel scaling system for pulsed synchrotron X-ray experiments

Kishimoto, Shunji*; Mitsui, Takaya; Haruki, Rie*; Yoda, Yoshitaka*; Taniguchi, Takashi*; Shimazaki, Shoichi*; Ikeno, Masahiro*; Saito, Masatoshi*; Tanaka, Manobu*

Journal of Instrumentation (Internet), 10(5), p.C05030_1 - C05030_6, 2015/05

 Times Cited Count:6 Percentile:28.47(Instruments & Instrumentation)

Journal Articles

Nuclear resonant scattering measurements on $$^{57}$$Fe by multichannel scaling with a 64 pixel silicon avalanche photodiode linear-array detector

Kishimoto, Shunji*; Mitsui, Takaya; Haruki, Rie*; Yoda, Yoshitaka*; Taniguchi, Takashi*; Shimazaki, Shoichi*; Ikeno, Masahiro*; Saito, Masatoshi*; Tanaka, Manobu*

Review of Scientific Instruments, 85(11), p.113102_1 - 113102_5, 2014/11

 Times Cited Count:8 Percentile:36.91(Instruments & Instrumentation)

Journal Articles

Zn nanoparticles irradiated with swift heavy ions at low fluences; Optically-detected shape elongation induced by nonoverlapping ion tracks

Amekura, Hiroshi*; Ishikawa, Norito; Okubo, Nariaki; Ridgway, M.*; Giulian, R.*; Mitsuishi, Kazuki*; Nakayama, Yoshiko*; Buchal, C.*; Mantl, S.*; Kishimoto, Naoki*

Physical Review B, 83(20), p.205401_1 - 205401_10, 2011/05

 Times Cited Count:35 Percentile:78.55(Materials Science, Multidisciplinary)

Elongation of metal nanoparticles (NPs) embedded in silica induced by swift heavy-ion irradiation, from spheres to spheroids, has been evaluated at low fluences by linearly polarized optical absorption spectroscopy. It is important to clarify whether the high fluences, i.e., track overlaps, are essential for the elongation. Zn NPs embedded in silica were irradiated with 200-MeV Xe ions. The comparison with numerical simulation suggested that the elongation of Zn NPs was induced by nonoverlapping ion tracks.

Journal Articles

Development on nanomechanics based joining analysis method and SiC and W joing for gas cooled fast reactor

Shibayama, Tamaki*; Kishimoto, Hirotatsu*; Koyama, Akira*; Yano, Yasuhide

Materia, 47(12), P. 628, 2008/12

no abstracts in English

Journal Articles

Nuclear resonant scattering of synchrotron radiation by Yb nuclides

Masuda, Ryo*; Higashitaniguchi, Satoshi*; Kitao, Shinji*; Kobayashi, Yasuhiro*; Seto, Makoto*; Mitsui, Takaya; Yoda, Yoshitaka*; Haruki, Rie*; Kishimoto, Shunji*

Journal of the Physical Society of Japan, 75(9), p.094716_1 - 094716_4, 2006/09

 Times Cited Count:2 Percentile:19.49(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Development of a highly coherent X-ray laser

Nishikino, Masaharu; Tanaka, Momoko; Kawazome, Hayato; Kawachi, Tetsuya; Sasaki, Akira; Hasegawa, Noboru; Ochi, Yoshihiro; Kishimoto, Maki; Nagashima, Keisuke; Onishi, Naofumi*

AIP Conference Proceedings 827, p.499 - 504, 2006/04

no abstracts in English

Journal Articles

Overview of the national centralized tokamak programme

Kikuchi, Mitsuru; Tamai, Hiroshi; Matsukawa, Makoto; Fujita, Takaaki; Takase, Yuichi*; Sakurai, Shinji; Kizu, Kaname; Tsuchiya, Katsuhiko; Kurita, Genichi; Morioka, Atsuhiko; et al.

Nuclear Fusion, 46(3), p.S29 - S38, 2006/03

 Times Cited Count:13 Percentile:41.84(Physics, Fluids & Plasmas)

The National Centralized Tokamak (NCT) facility program is a domestic research program for advanced tokamak research to succeed JT-60U incorporating Japanese university accomplishments. The mission of NCT is to establish high beta steady-state operation for DEMO and to contribute to ITER. The machine flexibility and mobility is pursued in aspect ratio and shape controllability, feedback control of resistive wall modes, wide current and pressure profile control capability for the demonstration of the high-b steady state.

Journal Articles

Recent progress in X-ray laser research in JAERI

Kawachi, Tetsuya; Nagashima, Keisuke; Kishimoto, Maki; Hasegawa, Noboru; Tanaka, Momoko; Ochi, Yoshihiro; Nishikino, Masaharu; Kawazome, Hayato; Tai, R.; Namikawa, Kazumichi*; et al.

Proceedings of SPIE's International Symposium on Optics and Photonics 2005, Vol.5919, p.59190L_1 - 59190L_11, 2005/09

Recent results of the X-ray laser research in Advanced Photon Research (APR) Center in JAERI are reported. In the application of the nickel-like silver laser at a wavelength of 13.9 nm, we report the observation of the microscopic polarization clusters in ferroelectrics material such as BaTi03 by use of the X-ray speckle technique, and other experiments such as photo-ionization of inner-shell electrons are intoroduced. In the development of high quality X-ray laser beam, recently we demonstrated temporally coherent X-ray beam at 23.6 nm, in which the high-order harmonics light was injected into the Ne-like Mn X-ray amplifier. We also mention about the development of new X-ray laser driver laser, which is based on 2 beams of zig-zag slab Nd:glass lasers with 0.1 Hz repetition-rate, and each beam line can provide 10 J output energy, and 1 ps duration.

Journal Articles

Precision hfs of $$^{126}$$Cs($$T$$$$_{1/2}$$ = 1.63 m) by ABMR

Pinard, J.*; Duong, H. T.*; Marescaux, D.*; Stroke, H. H.*; Redi, O.*; Gustafsson, M.*; Nilsson, T.*; Matsuki, S.*; Kishimoto, Yasuaki*; Kominato, K.*; et al.

Nuclear Physics A, 753(1-2), p.3 - 12, 2005/05

 Times Cited Count:4 Percentile:36.01(Physics, Nuclear)

The hfs separation $$Deltanu$$ of $$^{126}$$Cs($$T$$$$_{1/2} = 1.63$$ m) in the 6s $$^2$$S$$_{1/2}$$ ground state was obtained in a precision measurement near zero magnetic field by means of atomic beam magnetic resonance with laser optical pumping on-line with the CERN-PSB-ISOLDE mass separator. The result, $$Deltanu = 3629.514(0.001)$$ MHz, corrects significantly a previous published value from a high-field experiment. With our result, the precision of the nuclear magnetic moment, $$mu(^{126}$$Cs)$$sim 0.776 mu_N$$, is now limited by the influence of extended nuclear structure on the hfs (the Bohr-Weisskopf effect).

Journal Articles

Mach-Zehnder interference microscopy using a highly coherent X-ray laser

Nishikino, Masaharu; Kawazome, Hayato; Tanaka, Momoko; Kishimoto, Maki; Hasegawa, Noboru; Ochi, Yoshihiro; Kawachi, Tetsuya; Nagashima, Keisuke

IPAP Conference Series 7 (Proceedings of 8th International Conference on X-ray Microscopy (XRM 2005)), p.423 - 425, 2005/00

no abstracts in English

Journal Articles

Progress in X-ray laser development at JAERI

Kato, Yoshiaki; Daido, Hiroyuki; Nagashima, Keisuke; Kawachi, Tetsuya; Hasegawa, Noboru; Tanaka, Momoko; Tang, H.; Tai, R.; Lu, P.; Kishimoto, Maki; et al.

AIP Conference Proceedings 641, p.31 - 39, 2002/00

no abstracts in English

Journal Articles

Theory and MHD simulation of fuelling by compact toroid injection

Suzuki, Yoshio; Hayashi, Takaya*; Kishimoto, Yasuaki

Nuclear Fusion, 41(7), p.873 - 881, 2001/07

 Times Cited Count:11 Percentile:35.68(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Effect of magnetic reconnection in CT penetration into magnetized plasmas

Suzuki, Yoshio; Hayashi, Takaya*; Kishimoto, Yasuaki

Earth Planets and Space, 53(6), p.547 - 551, 2001/06

 Times Cited Count:2 Percentile:9.61(Geosciences, Multidisciplinary)

no abstracts in English

Journal Articles

Dynamics of spheromak-like compact toroids in a drift tube

Suzuki, Yoshio; Hayashi, Takaya*; Kishimoto, Yasuaki

Nuclear Fusion, 41(6), p.761 - 777, 2001/06

no abstracts in English

Journal Articles

Deceleration mechanism of spheromak-like compact toroid penetrating into magnetized plasmas

Suzuki, Yoshio; Hayashi, Takaya*; Kishimoto, Yasuaki

Physics of Plasmas, 7(12), p.5033 - 5037, 2000/12

 Times Cited Count:6 Percentile:21.05(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Tree-dimensional dynamics of a compact torus injected into magnetized plasmas II

Suzuki, Yoshio; Hayashi, Takaya*; Miyoshi, Takahiro; Kishimoto, Yasuaki; NEXT Group

Purazuma, Kaku Yugo Gakkai-Shi, 76(3), p.288 - 294, 2000/03

no abstracts in English

JAEA Reports

Generation of ultra-short pulse hard X-rays with ultra-short pulse intense laser

Ueshima, Yutaka*; Kishimoto, Yasuaki; Sasaki, Akira; Moribayashi, Kengo*; Nagashima, Keisuke; Kado, Masataka; Sagisaka, Akito*; Tajima, Toshiki*

JAERI-Research 98-048, 46 Pages, 1998/08

JAERI-Research-98-048.pdf:1.88MB

no abstracts in English

Journal Articles

Development of fuel failure detection system for a high temperature gas cooled reactor, IV

Katagiri, Masaki; Kishimoto, Maki; Terada, Hiromi; ; *; ; Ito, Hirokuni; ; Kobayashi, Fumiaki

IEEE Transactions on Nuclear Science, 37(3), p.1400 - 1404, 1990/06

 Times Cited Count:3 Percentile:45.12(Engineering, Electrical & Electronic)

no abstracts in English

57 (Records 1-20 displayed on this page)