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Journal Articles

Comparison of tritium retention and carbon deposition in JET and JT-60U

Tanabe, Tetsuo*; Sugiyama, Kazuyoshi*; Coad, P.*; Bekris, N.*; Glugla, M.*; Miya, Naoyuki

Journal of Nuclear Materials, 345(2-3), p.89 - 95, 2005/10

 Times Cited Count:16 Percentile:24.71(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Application of neutron imaging plate and neutron CT methods on nuclear fuels and materials

Yasuda, Ryo; Matsubayashi, Masahito; Nakata, Masahito; Harada, Katsuya; Amano, Hidetoshi; Sasajima, Fumio; Nishi, Masahiro; Horiguchi, Yoji

IEEE Transactions on Nuclear Science, 52(1), p.313 - 316, 2005/02

 Times Cited Count:9 Percentile:43.05(Engineering, Electrical & Electronic)

Neutron radiography is useful to inspect macroscopic change in nuclear fuels before and after irradiation. We have been investigated the practicality of neutron imaging plate and neutron CT methods for the inspection of the spent fuels. A fresh UO2 fuel rod was examined by those methods. The test results of those samples are available to develop the system of those methods for the spent fuels and to determine the specifications of the system. Some good images of those samples are obtained by those examinations. The shape of the pellets in the fuel rod is clearly recognized in the image. Those images are analyzed to estimate the size of some parts in the fuel pellets.

Journal Articles

Tritium behavior in JT-60

Masaki, Kei

Kaku Yugoro, (11), p.30 - 33, 2004/03

no abstracts in English

Journal Articles

New photostimulable phosphors for neutron imaging

Sakasai, Kaoru; Katagiri, Masaki; Matsubayashi, Masahito; Nakamura, Tatsuya; Kondo, Yasuhiro*

Hoshasen, 29(4), p.189 - 197, 2003/10

no abstracts in English

Journal Articles

Application of hydrogen analysis by neutron imaging plate method to Zircaloy cladding tubes

Yasuda, Ryo; Nakata, Masahito; Matsubayashi, Masahito; Harada, Katsuya; Hatakeyama, Yuichi; Amano, Hidetoshi

Journal of Nuclear Materials, 320(3), p.223 - 230, 2003/08

 Times Cited Count:13 Percentile:32.5(Materials Science, Multidisciplinary)

Neutron radiography is one of effective tools to determine hydrided region in Zircaloy cladding tubes. In this work, the practicability of the neutron radiography for hydrogen analysis is further investigated by using standard samples with known hydrogen concentration. Local hydrogen concentration in hydrided Zircaloy tube is quantitatively estimated using the standard samples by neutron imaging plate (NIP) method. The local area is equivalent to a picture element in the image; e.g., 0.1mm$$times$$0.1mm. In addition, contribution of an oxide film in the tubes to the images is investigated using oxidized samples with hydrides or no hydride. In NIP images of oxidized tube no oxide film was recognized. Numerical image analysis also shows no effect of the oxide film on the image. These results show that the influence of oxygen on image contrast can be neglected when hydrogen analysis is performed on the Zircaloy tube with oxide film and hydrides by NIP method.

Journal Articles

Tritium retention of plasma facing components in tokamaks

Tanabe, Tetsuo*; Bekris, N.*; Coad, P.*; Skinner, C. H.*; Glugla, M.*; Miya, Naoyuki

Journal of Nuclear Materials, 313-316, p.478 - 490, 2003/03

 Times Cited Count:64 Percentile:3.03(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

High resolution neutron protein crystallography, hydrogen and hydration in proteins

Niimura, Nobuo; Chatake, Toshiyuki; Ostermann, A.; Kurihara, Kazuo; Tanaka, Ichiro

Zeitschrift f$"u$r Kristallographie, 218(2), p.96 - 107, 2003/03

no abstracts in English

Journal Articles

Tritium profiles on the surface of graphite tiles used in JT-60U

Sugiyama, Kazuyoshi*; Miyasaka, Kazutaka*; Tanabe, Tetsuo*; Masaki, Kei; Goto, Yoshitaka*; Tobita, Kenji; Kodama, Kozo; Miya, Naoyuki

Physica Scripta, T103, p.56 - 58, 2003/00

 Times Cited Count:14 Percentile:35.41(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Radiation measurement for safeguards environmental samples by imaging plate

Yasuda, Kenichiro; Sakurai, Satoshi; Gunji, Hideho; Usuda, Shigekazu

Journal of Nuclear Science and Technology, 39(Suppl.3), p.552 - 555, 2002/11

In order to contribute to the strengthened safeguards system based on the Program 93+2 of the IAEA, Japan Atomic Energy Research Institute (JAERI) constructed the CLEAR facility (Clean Laboratory for Environmental Analysis and Research) and is developing analytical technology for ultra trace amounts of nuclear materials in environmental samples. To avoid cross-contamination among the samples and contamination of the clean rooms, radioactive materials in the samples to be introduced into the CLEAR facility will be limited to a certain amount. For this purpose the authors have examined the feasibility of Imaging-plate method, which is a kind of autoradiography and is suitable for determination on distribution of low-level radioactivity in the samples. Preliminary examination with $$beta$$-ray (K-40), the linearity was obtained in the range of 0.01 - 0.2 Bq. The experiments with $$alpha$$-ray (Sm-147) suggested the detection limit of 0.01 Bq, which was equivalent to 2 $$mu$$g of natural uranium. At the presentation, the results on actual environmental samples will be reported.

Journal Articles

Optimization of neutron imaging plate

Haga, Yuko*; Neriishi, Keiko*; Takahashi, K.*; Niimura, Nobuo

Nuclear Instruments and Methods in Physics Research A, 487(3), p.504 - 510, 2002/07

 Times Cited Count:9 Percentile:45.41(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Surface distribution of tritium on graphite tiles of divertor area in JT-60U

Tanabe, Tetsuo*; Miyasaka, Kazutaka*; Sugiyama, Kazuyoshi*; Masaki, Kei; Kodama, Kozo; Miya, Naoyuki

Fusion Engineering and Design, 41(3), p.877 - 881, 2002/05

no abstracts in English

Journal Articles

Tritium distribution measurement of FNS tritium targets by imaging plate

Kutsukake, Chuzo; Seki, Masakazu; Tanaka, Shigeru; Oginuma, Yoshikazu*; Abe, Yuichi; Yamauchi, Michinori*

Fusion Science and Technology, 41(3), p.555 - 559, 2002/05

no abstracts in English

Journal Articles

Application of neutron radiography for estimating concentration and distribution of hydrogen in zircaloy cladding tubes

Yasuda, Ryo; Matsubayashi, Masahito; Nakata, Masahito; Harada, Katsuya

Journal of Nuclear Materials, 302(2-3), p.156 - 164, 2002/04

 Times Cited Count:26 Percentile:15.01(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

High-speed readout method using wavelength-shifting fibers for an imaging plate

Katagiri, Masaki; Sakasai, Kaoru; Kishimoto, Maki; Nakamura, Tatsuya; To, Kentaro; Takahashi, Hiroyuki*; Nakazawa, Masaharu*

Nuclear Instruments and Methods in Physics Research A, 477(1-3), p.179 - 183, 2002/03

 Times Cited Count:4 Percentile:68.69(Instruments & Instrumentation)

no abstracts in English

JAEA Reports

Development of advanced neutron radiography for inspection on irradiated fuels and materials, 3; Examination of neutron imaging plate and computed tomography methods on unirradiated fuel rod

Yasuda, Ryo; Matsubayashi, Masahito; Nakata, Masahito; Harada, Katsuya; Amano, Hidetoshi; Ando, Hitoshi*; Sasajima, Fumio; Nishi, Masahiro; Horiguchi, Yoji

JAERI-Tech 2002-001, 23 Pages, 2002/02

JAERI-Tech-2002-001.pdf:3.79MB

Advanced neutron radiography techniques such as neutron imaging plate (NIP) and Computed Tomography (CT) methods have been investigated the practicality for Post Irradiation Examination (PIE). In this work, an unirradiated fuel rod was examined by NIP and CT methods in order to collect the fundamental data for applying these techniques to PIE.The fuel rod is composed of seven-enriched UO2 pellet and two-natural UO2 pellet that are loaded into a Zircaloy tube. There are somewhat difference in the size and shape among those UO2 pellets. A transmitted and cross-sectional images were obtained by NIP and CT methods, respectively.In the NIP image, the difference in the size, shape, and enrichment among the UO2 pellets is obviously recognized. In the case of CT method, the images clearly show the detailed shape of the cross section in the pellets, in addition, the difference in the enrichment between the natural and enriched pellets is recognized.

Journal Articles

A Fast readout method for an imaging plate using wavelength shifting fibers and line-shaped laser

Sakasai, Kaoru; Katagiri, Masaki; Nakamura, Tatsuya; To, Kentaro; Takahashi, Hiroyuki*; Nakazawa, Masaharu*

IEEE Transactions on Nuclear Science, 49(1), p.156 - 159, 2002/02

 Times Cited Count:0 Percentile:100(Engineering, Electrical & Electronic)

no abstracts in English

Journal Articles

Tritium distribution on plasma facing graphite tiles of JT-60U

Tanabe, Tetsuo*; Sugiyama, Kazuyoshi*; Masaki, Kei; Goto, Yoshitaka*; Tobita, Kenji; Miya, Naoyuki

IAEA-CN-94/EX/P2-11 (CD-ROM), 6 Pages, 2002/00

no abstracts in English

Journal Articles

Tritium areal distribution on graphite tiles of JT-60U divertor by imaging plate technique

Tanabe, Tetsuo*; Miyasaka, Kazutaka*; Masaki, Kei; Miya, Naoyuki

Purazuma, Kaku Yugo Gakkai-Shi, 77(11), p.1083 - 1084, 2001/11

no abstracts in English

Journal Articles

A Fast readout method for an imaging plate using CAMAC system

Sakasai, Kaoru; Katagiri, Masaki; To, Kentaro; Nakamura, Tatsuya; Takahashi, Hiroyuki*; Nakazawa, Masaharu*

Journal of the Physical Society of Japan, Vol.70, Supplement A, p.468 - 470, 2001/05

 Times Cited Count:10 Percentile:44.46(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Neutron diffractometer for biological crystallography-3; BIX-3

Tanaka, Ichiro; Kurihara, Kazuo; Chatake, Toshiyuki; Niimura, Nobuo

Journal of the Physical Society of Japan, Vol.70, Supplement A, p.459 - 461, 2001/05

no abstracts in English

51 (Records 1-20 displayed on this page)