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Journal Articles

Engineering and maintenance studies of the ITER diagnostic upper port plug

Sato, Kazuyoshi; Omori, Junji; Kondoh, Takashi; Hatae, Takaki; Kajita, Shin*; Ishikawa, Masao; Neyatani, Yuzuru; Ebisawa, Katsuyuki*; Kusama, Yoshinori

Fusion Engineering and Design, 84(7-11), p.1713 - 1715, 2009/06

 Times Cited Count:1 Percentile:10.95(Nuclear Science & Technology)

Engineering analyses have been performed for the representative diagnostic upper port plug of ITER. Maintenance and integration design have been also carried out for the diagnostic components to be installed in the upper port plug. From the electromagnetic and structural analyses, it has come up an important problem to suppress the displacement of the upper port plug rather than to reduce the produced stress. Reducing the EM force will help to decrease the severity of potential displacement. Maximum displacement of the port plug decreases with increasing in the number of slits in a manner that the displacement would seem to be less than the design tolerance. A proposed low body roller and inner frame may enhance maintenance and integration. These studies and designs have established the design basis for the diagnostic upper port plug.

Journal Articles

Development of ITER diagnostic upper port plug

Sato, Kazuyoshi; Omori, Junji; Ebisawa, Katsuyuki*; Kusama, Yoshinori; Neyatani, Yuzuru

Plasma and Fusion Research (Internet), 2, p.S1088_1 - S1088_4, 2007/11

A part of diagnostic device in vacuum vessel is planned to install in the port plug to make sure the line of sight of diagnostics. Only basic concept is shown for the port plug since design of diagnostic devices has not been substantiated yet. The integration design of the port plug has been performed and the structure concept for electro-magnetic and neutron load has been investigated as for the No.11 upper port plug to confirm reliability of the proposed design. Three diagnostics will be installed in the No.11 upper port plug, the edge Thomson scattering system, the visible-IR TV divertor viewing system and the neutron activation system. To integrate theses diagnostic systems in the port plug, it was designed the arrangement of the labyrinth of optical path, the driving mechanism and cooling systems for shutters and mirrors, the maintenance space. The part just behind the blanket shield module (BSM) was changed to secure a space for maintenance and for associated diagnostic first mirror and shutter, whereas this place is assigned for neutron shielding in the present design. The BSM support, which is main component to apply the electro-magnetic load, was arranged with optical path inside BSM.

Journal Articles

Engineering design of the ITER invessel neutron monitor using micro-fission chambers

Nishitani, Takeo; Yamauchi, Michinori; Izumi, Mikio*; Hayakawa, Atsuro*; Ebisawa, Katsuyuki*; Kondoh, Takashi; Kusama, Yoshinori

Fusion Engineering and Design, 82(5-14), p.1192 - 1197, 2007/10

 Times Cited Count:4 Percentile:33.11(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Progress in development of edge Thomson scattering system for ITER

Hatae, Takaki; Nakatsuka, Masahiro*; Yoshida, Hidetsugu*; Ebisawa, Katsuyuki*; Kusama, Yoshinori; Sato, Kazuyoshi; Katsunuma, Atsushi*; Kubomura, Hiroyuki*; Shinobu, Katsuya*

Fusion Science and Technology, 51(2T), p.58 - 61, 2007/02

 Times Cited Count:6 Percentile:44.88(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

User's manual of a computer code for evaluating effectiveness of seismic component base isolation, EBISA; Function of dynamic response analysis code

Tsutsumi, Hideaki*; Sugino, Hideharu*; Onizawa, Kunio; Mori, Kazunari*; Yamada, Hiroyuki*; Shibata, Katsuyuki; Ebisawa, Katsumi*

JAEA-Data/Code 2006-004, 167 Pages, 2006/03

JAEA-Data-Code-2006-004.pdf:6.41MB

EBISA (Equipment Base Isolation System Analysis) code evaluates the effectiveness of seismic isolation for the important components in the seismic safety, and consists of the three codes, probabilistic seismic hazard code (SHEAT), seismic dynamic response analysis code (RESP) and seismic failure probability and frequency evaluation code. In these codes, RESP code is used for the calculation of the dynamic response behavior of a nuclear component with seismic isolation devices. This report describes the overall explanation of EBISA, and user's guide of RESP code including the analysis function, input manual and sample problem.

Journal Articles

Design and evaluation methodology for seismic base isolation of nuclear components by probabilistic approach

Tsutsumi, Hideaki*; Ebisawa, Katsumi*; Yamada, Hiroyuki*; Shibata, Katsuyuki; Fujimoto, Shigeru*

Nihon Zairyo Gakkai JCOSSAR 2003 Rombunshu, p.829 - 836, 2003/11

no abstracts in English

Journal Articles

Development of in-vessel neutron monitor using micro-fission chambers for ITER

Yamauchi, Michinori*; Nishitani, Takeo; Ochiai, Kentaro; Morimoto, Yuichi*; Hori, Junichi; Ebisawa, Katsuyuki*; Kasai, Satoshi; Walker, C.*

Review of Scientific Instruments, 74(3), p.1730 - 1734, 2003/03

 Times Cited Count:21 Percentile:71.21(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Neutron activation system using water flow for ITER

Nishitani, Takeo; Ebisawa, Katsuyuki*; Kasai, Satoshi; Walker, C.*

Review of Scientific Instruments, 74(3), p.1735 - 1738, 2003/03

 Times Cited Count:13 Percentile:58.19(Instruments & Instrumentation)

no abstracts in English

JAEA Reports

Design of ex-vessel neutron monitor for ITER

Nishitani, Takeo; Iguchi, Tetsuo*; Ebisawa, Katsuyuki*; Yamauchi, Michinori*; Walker, C.*; Kasai, Satoshi

JAERI-Tech 2002-062, 39 Pages, 2002/07

JAERI-Tech-2002-062.pdf:1.65MB

no abstracts in English

Journal Articles

R&D of seismic emergency information transmission system

Ebisawa, Katsumi; Kuno, Tetsuya; Shibata, Katsuyuki; Oi, Masahiro*; Horiuchi, Shigeki*; Abe, Ichiro*; Tsuzuki, Kazuhisa*

Nihon Genshiryoku Gakkai Wabun Rombunshi, 1(2), p.177 - 190, 2002/06

no abstracts in English

JAEA Reports

Design of neutron monitor using flowing water activation for ITER

Nishitani, Takeo; Ebisawa, Katsuyuki*; Walker, C.*; Kasai, Satoshi

JAERI-Tech 2002-033, 40 Pages, 2002/03

JAERI-Tech-2002-033.pdf:1.54MB

no abstracts in English

JAEA Reports

Performance test of micro-fission chambers for in-vessel neutron monitoring of ITER

Yamauchi, Michinori*; Nishitani, Takeo; Ochiai, Kentaro; Morimoto, Yuichi*; Hori, Junichi; Ebisawa, Katsuyuki*; Kasai, Satoshi

JAERI-Tech 2002-032, 41 Pages, 2002/03

JAERI-Tech-2002-032.pdf:2.62MB

A micro-fission chamber and a dummy chamber without uranium were fabricated and the performance was tested. They are designed to be installed inside the vacuum vessel of compact ITER (ITER-FEAT) for neutron monitoring. Vacuum leak rate of the chamber, resistances between central conductor and outer sheath, and mechanical strength up to 50G acceleration were confirmed to meet design criteria. Gamma-ray sensitivity was measured with $$^{60}$$Co gamma-ray irradiation facility at JAERI Takasaki. The output signals for gamma-rays in Campbelling mode were estimated to be less than 0.1% those by neutrons at the location behind the blanket module in ITER-FEAT. Detector response for 14 MeV neutrons was investigated with the FNS facility. Excellent linearity between count rates and neutron fluxes was confirmed. According to the test for the change of surrounding materials, the sensitivity was enhanced by slow-downed neutrons, which agreed with the calculation result by MCNP-4C code. As a result, it was concluded that the developed micro-fission chamber is applicable for ITER-FEAT.

JAEA Reports

Design of in-vessel neutron monitor using micro fission chambers for ITER

Nishitani, Takeo; Ebisawa, Katsuyuki*; Walker, C.*; Kasai, Satoshi

JAERI-Tech 2001-066, 57 Pages, 2001/10

JAERI-Tech-2001-066.pdf:1.89MB

no abstracts in English

Journal Articles

Absolute measurement of D-T neutron flux with a monitor using activation of flowing water

Uno, Yoshitomo; Kaneko, Junichi; Nishitani, Takeo; Maekawa, Fujio; Tanaka, Teruya; Shibata, S.*; Ikeda, Yujiro; Khripunov, V.*; Walker, C. I.*; Ebisawa, Katsuyuki*; et al.

Fusion Engineering and Design, 56-57, p.895 - 898, 2001/10

 Times Cited Count:6 Percentile:45.58(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Study on the dynamic response analysis for evaluating the effectiveness of base isolation for nuclear components

Mori, Kazunari*; Tsutsumi, Hideaki*; Yamada, Hiroyuki; Ebisawa, Katsumi; Shibata, Katsuyuki

JAERI-Tech 2001-037, 85 Pages, 2001/06

JAERI-Tech-2001-037.pdf:6.27MB

no abstracts in English

JAEA Reports

Shaking table test and dynamic response analysis of 3-D component base isolation system using multi-layer rubber bearings and coil springs

Tsutsumi, Hideaki*; Yamada, Hiroyuki; Ebisawa, Katsumi; Shibata, Katsuyuki; Fujimoto, Shigeru*

JAERI-Tech 2001-033, 124 Pages, 2001/06

JAERI-Tech-2001-033.pdf:9.98MB

no abstracts in English

JAEA Reports

Earthquake observation database in JAERI Oarai site obtained by vertical instrument arrays from 1987-2000

Ebisawa, Katsumi; Yamada, Hiroyuki; Tsutsumi, Hideaki*; Shibata, Katsuyuki; Ando, Kazuhiro*; Baba, Osamu; Suzuki, Hideyuki

JAERI-Data/Code 2001-009, 96 Pages, 2001/03

JAERI-Data-Code-2001-009.pdf:4.14MB

no abstracts in English

JAEA Reports

Characteristics and dynamic response analysis of 3-D component base isolation system using ball bearings and air springs

Tsutsumi, Hideaki*; Yamada, Hiroyuki; Mori, Kazunari*; Ebisawa, Katsumi; Shibata, Katsuyuki

JAERI-Tech 2000-086, 93 Pages, 2001/02

JAERI-Tech-2000-086.pdf:6.56MB

no abstracts in English

Journal Articles

Plasma diagnostics for ITER-FEAT

Ebisawa, Katsuyuki*; Costley, A.*; Donn$'e$, A. J. H.*; Janeschitz, G.*; Kasai, Satoshi; Malaquias, A.*; Vayakis, G.*; Walker, C. I.*; Yamamoto, Shin; Zavariaev, V.*

Review of Scientific Instruments, 72(1), p.545 - 550, 2001/01

 Times Cited Count:18 Percentile:68.93(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Development of seismic emergency information system adaptable to disaster management spatial information system

Ebisawa, Katsumi; Kuno, Tetsuya; Shibata, Katsuyuki; Abe, Ichiro*; Kakumoto, Shigeru*; Kameda, Hiroyuki*

Chiiki Anzen Gakkai Kogaishu, 10, p.133 - 136, 2000/11

no abstracts in English

55 (Records 1-20 displayed on this page)