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Journal Articles

Estimation of the lifetime of resin insulators against baking temperature for JT-60SA in-vessel coils

Sukegawa, Atsuhiko; Murakami, Haruyuki; Matsunaga, Go; Sakurai, Shinji; Takechi, Manabu; Yoshida, Kiyoshi; Ikeda, Yoshitaka

Fusion Engineering and Design, 98-99, p.2076 - 2079, 2015/10

 Times Cited Count:1 Percentile:10.78(Nuclear Science & Technology)

The JT-60SA project is a EU - JA satellite tokamak under Broader Approach in support of the ITER project. In-vessel coils are designed and assembled by JA. The resin-insulator is required to have a heat resistance against the baking temperature of vacuum vessel of $$sim$$200$$^{circ}$$C (40000 hour). Thus the assessment of the heat load is fundamental for the design of the coils. However, the estimation of the lifetime of resin-insulator under the high-temperature region has not been examined. In the present study, the estimation of the lifetime of seven candidate resin-insulators such as epoxy resin and cyanate-ester resin under the $$sim$$220$$^{circ}$$C temperature region have been performed for the current coils design. Weight reduction of the seven candidate insulators was measured at different heating times under 180$$^{circ}$$C, 200$$^{circ}$$C and 220$$^{circ}$$C environment using three thermostatic ovens, respectively. The reduction of the insulators has been used as input for Weibull-analysis towards Arrhenius-plot. Lifetime of the resins has been estimated for the first time at the high temperature region by the plot. Lifetime of the resin-insulators have been evaluated and discussed as well as the available temperature of the in-vessel coils.

JAEA Reports

An Irradiation experiment for qualification of insulating coating

Nakamichi, Masaru*; Kawamura, Hiroshi

JAERI-Research 2005-015, 35 Pages, 2005/06

JAERI-Research-2005-015.pdf:6.48MB

no abstracts in English

Journal Articles

High-resolution soft X-ray photoemission spectroscopy of spinel-type compound CuIr$$_{2}$$S$$_{4}$$

Okane, Tetsuo; Fujimori, Shinichi; Mamiya, Kazutoshi; Okamoto, Jun; Muramatsu, Yasuji; Fujimori, Atsushi; Suzuki, Hiroyuki*; Matsumoto, Takehiko*; Furubayashi, Takao*; Isobe, Masaaki*; et al.

Journal of Magnetism and Magnetic Materials, 272-276(Suppl.), p.e297 - e298, 2004/05

 Times Cited Count:5 Percentile:30.43(Materials Science, Multidisciplinary)

The electronic structure of spinel-type chalcogenide CuIr$$_{2}$$S$$_{4}$$, which exhibits a metal-insulator transition (MIT) as a function of temperature, has been studied by photoemission spectroscopy (PES). Below the transition temperature $$T_{mathrm{MI}}$$, the valence-band PES spectra indicate a gap formation, while the overall valence-band structure is shifted to the higher binding-energy side. The line shape of the Ir 4${it f}$ core-level PES spectra shows a dramatic change across $$T_{mathrm{MI}}$$, which may be associated with the variation of the Ir 5${it d}$ electron states.

JAEA Reports

Report of the 13th IEA Workshop on Radiation Effects in Ceramic Insulators; December 9, 2003, Kyoto (Cooperative research)

Department of Fusion Engineering Research

JAERI-Review 2004-004, 96 Pages, 2004/03

JAERI-Review-2004-004.pdf:14.47MB

no abstracts in English

JAEA Reports

Study of neutron irradiation effects on mineral insulated cables for fusion reactors (Contract research)

Iida, Toshiyuki*; Tanaka, Teruya*; Sato, Fuminobu*; Ochiai, Kentaro; Nishitani, Takeo

JAERI-Tech 2002-077, 38 Pages, 2002/09

JAERI-Tech-2002-077.pdf:2.7MB

no abstracts in English

Journal Articles

Repeated impact test on plasma sprayed alumina insulation film for fusion reactor

Kanari, Moriyasu; Abe, Tetsuya; Kosaku, Yasuo; Tanzawa, Sadamitsu; Hiroki, Seiji

Nihon Genshiryoku Gakkai-Shi, 43(12), p.1228 - 1234, 2001/12

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

no abstracts in English

Journal Articles

XAFS study on RbC$$_{60}$$

Kubozono, Yoshihiro*; Mimura, Kazue*; Takabayashi, Yasuhiro*; Maeda, Hironobu*; Kashino, Setsuo*; Emura, Shuichi*; Nishihata, Yasuo; Uruga, Tomoya*; Tanaka, Tsunehiro*; Takahashi, Masao*

Journal of Synchrotron Radiation, 6(Part3), p.564 - 566, 1999/05

The Rb K-edge XAFS spectra for the stable phase of RbC60 which is a quasi one-dimensional polymer were measured in the temperature range from 14.6 to 210 K in order to clarify the origin of the metal-insulator transition around 50 K. The distances and mean-square relative displacements between the Rb atom and the neighboring C atoms determined by XAFS exhibited no change around 50 K, implying that the metal-insulator transition originates from the SDW instablity.

JAEA Reports

ITER cryostat thermal shield detailed design

*; Nakahira, Masataka; Hamada, Kazuya; Takahashi, Hiroyuki*; Tada, Eisuke; Kato, Takashi; *

JAERI-Tech 99-027, 113 Pages, 1999/03

JAERI-Tech-99-027.pdf:7.4MB

no abstracts in English

Journal Articles

Effect of filler concentration on electrical conductivity and ultralow-frequency dielectric properties

*; *; *; *; Ito, Masayuki; Seguchi, Tadao

IEEE Trans. Dielect. Elect. Insul., 2(1), p.54 - 61, 1995/02

 Times Cited Count:11 Percentile:66.16(Engineering, Electrical & Electronic)

no abstracts in English

Journal Articles

Effects of cryogenic reactor irradiation on organic insulators

Kato, Teruo

Teion Kogaku, 30(11), p.510 - 518, 1995/00

no abstracts in English

Journal Articles

Material problems and requirements related to the development of fusion blankets; The Designer point of view

Donne, M. D.*; Harries, D. R.*; Kalinin, G.*; Mattas, R.*; Mori, Seiji

Journal of Nuclear Materials, 212-215(1), p.69 - 79, 1994/09

no abstracts in English

Journal Articles

ESR study on crosslinking reaction of PE induced by dicumyl-per-oxide

Yamazaki, T.*; Seguchi, Tadao

DEI-92-118, p.103 - 110, 1992/00

no abstracts in English

JAEA Reports

Data Compilation for Radiation Effects on Ceramic Insulators

*; Ozawa, K.; *; *

JAERI-M 86-127, 76 Pages, 1986/08

JAERI-M-86-127.pdf:1.48MB

no abstracts in English

Journal Articles

Effect of low temperature irradiation on insulators and other materials for superconducting magnets

;

Journal of Nuclear Materials, 103-104, p.729 - 734, 1981/00

no abstracts in English

JAEA Reports

Test of High Temperature Fuel Element,II; High Temperature Piping

Akino, Norio; ; Nekoya, Shinichi; Takizuka, Takakazu; Emori, Kouichi; Sanokawa, Konomo;

JAERI-M 9195, 41 Pages, 1980/11

JAERI-M-9195.pdf:2.69MB

no abstracts in English

Journal Articles

Effect of low temperature irradiation on the mechanical strength of organic insulators for superconducting magnets

;

Cryogenics, 20(8), p.441 - 444, 1980/00

 Times Cited Count:15 Percentile:73.68(Thermodynamics)

no abstracts in English

Journal Articles

Journal Articles

Radiation degradation of polymaeric material

Hayakawa, Naohiro

Hoshasen Kagaku, 13(25), p.3 - 7, 1978/00

no abstracts in English

Journal Articles

21 (Records 1-20 displayed on this page)