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Journal Articles

Evaluation of tritium release behavior from Li$$_{2}$$TiO$$_{3}$$ during DT neutron irradiation by use of an improved tritium collection method

Edao, Yuki; Kawamura, Yoshinori; Hoshino, Tsuyoshi; Ochiai, Kentaro

Fusion Engineering and Design, 112, p.480 - 485, 2016/11

https://doi.org/10.1016/j.fusengdes.2016.06.013
 Times Cited Count：8 Percentile：55.65(Nuclear Science & Technology)

The accurate measurement of behavior of bred tritium released from a tritium breeder is indispensable to understand the behavior for a design of a tritium extraction system. The tritium collection method combined a CuO bed and water bubbles was not suitable to measure transient behavior of tritium released from Li$$_{2}$$TiO$$_{3}$$ during neutron irradiation because tritium released behavior was changed to be delayed due to adsorption of oxidized tritium on the CuO. Hence, the tritium collection method with hydrophobic catalyst instead of the CuO was demonstrated and succeeded the accurate release measurement of tritium from Li$$_{2}$$TiO$$_{3}$$. With the method, we assessed the behavior of tritium release under the various conditions since tritium should be released from Li$$_{2}$$TiO$$_{3}$$ as the form of HT as much as possible from the view point of the fuel cycle. Our results indicated; promotion of isotopic exchange reaction on the surface of Li$$_{2}$$TiO$$_{3}$$ by addition of hydrogen in sweep gas is mandatory in order to release tritium smoothly from Li$$_{2}$$TiO$$_{3}$$ irradiated with neutrons; the favorable sweep gas to release as the form of HT was hydrogen added inert gas; and the temperature of Li$$_{2}$$TiO$$_{3}$$ was the dominant parameter to control the chemical form of tritium released from the Li$$_{2}$$TiO$$_{3}$$.

Journal Articles

High energy heavy ion induced structural disorder in Li$$_{2}$$TiO$$_{3}$$

Nakazawa, Tetsuya; Naito, Akira*; Aruga, Takeo; Grismanovs, V.*; Chimi, Yasuhiro; Iwase, Akihiro*; Jitsukawa, Shiro

Journal of Nuclear Materials, 367-370(2), p.1398 - 1403, 2007/08

https://doi.org/10.1016/j.jnucmat.2007.04.003
 Times Cited Count：45 Percentile：92.66(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Evaluation of contact strength of Li$$_{2}$$TiO$$_{3}$$ pebbles with different diameters

Tsuchiya, Kunihiko; Kawamura, Hiroshi; Tanaka, Satoru*

Fusion Engineering and Design, 81(8-14), p.1065 - 1069, 2006/02

https://doi.org/10.1016/j.fusengdes.2005.07.031
 Times Cited Count：11 Percentile：58.92(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Key achievements in elementary R&D on water-cooled solid breeder blanket for ITER test blanket module in JAERI

Suzuki, Satoshi; Enoeda, Mikio; Hatano, Toshihisa; Hirose, Takanori; Hayashi, Kimio; Tanigawa, Hisashi; Ochiai, Kentaro; Nishitani, Takeo; Tobita, Kenji; Akiba, Masato

Nuclear Fusion, 46(2), p.285 - 290, 2006/02

https://doi.org/10.1088/0029-5515/46/2/012
 Times Cited Count：3 Percentile：10.31(Physics, Fluids & Plasmas)

This paper presents significant progress in R&D of key technologies on the water-cooled solid breeder blanket for the ITER-TBM in JAERI. By the improvement of heat treatment process for blanket module fabrication, a fine-grained microstructure of F82H, can be obtained by homogenizing it at 1150 $$^{circ}$$C followed by normalizing at 930 $$^{circ}$$C after the HIP process. Moreover, a promising bonding process for a tungsten armor and an F82H structural material was developed by using a uniaxial hot compression without any artificial compliant layer. Also, it has been confirmed that a fatigue lifetime correlation, which was developed for ITER divertor, can be applicable for F82H first wall mock-up. As for R&D on a breeder material, Li$$_{2}$$TiO$$_{3}$$, the effect of compression loads on thermal conductivity of pebble beds has been clarified. JAERI have extensively developed key technologies for ITER-TBM, and now steps up into an engineering R&D stage, where integrated performance of TBM structures will be demonstrated by scalable mock-ups.

Journal Articles

Behavior on Li$$_{2}$$TiO$$_{3}$$ under varied surface condition

Olivares, R.*; Oda, Takuji*; Oya, Yasuhisa*; Tanaka, Satoru*; Tsuchiya, Kunihiko

Fusion Engineering and Design, 75-79, p.765 - 768, 2005/11

https://doi.org/10.1016/j.fusengdes.2005.06.041
 Times Cited Count：9 Percentile：51.72(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Effects of gelation and sintering conditions on granulation of Li$$_{2}$$TiO$$_{3}$$ pebbles from Li-Ti complex solution

Tsuchiya, Kunihiko; Kawamura, Hiroshi; Casadio, S.*; Alvani, C.*

Fusion Engineering and Design, 75-79, p.877 - 880, 2005/11

https://doi.org/10.1016/j.fusengdes.2005.06.063
 Times Cited Count：27 Percentile：84.12(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Control of particle size and density of Li$$_{2}$$TiO$$_{3}$$ pebbles fabricated by indirect wet processes

Tsuchiya, Kunihiko; Kawamura, Hiroshi; Takayama, Tomoo*; Kato, Shigeru*

Journal of Nuclear Materials, 345(2-3), p.239 - 244, 2005/10

https://doi.org/10.1016/j.jnucmat.2005.06.005
 Times Cited Count：39 Percentile：90.78(Materials Science, Multidisciplinary)

no abstracts in English

JAEA Reports

Li depletion effects on Li$$_{2}$$TiO$$_{3}$$ reaction with H$$_{2}$$ in thermo-chemical environment relevant to breeding blanket for fusion power plants

Alvani, C.*; Casadio, S.*; Contini, V.*; Giorgi, R.*; Mancini, M. R.*; Tsuchiya, Kunihiko; Kawamura, Hiroshi

JAERI-Review 2005-024, 28 Pages, 2005/07

JAERI-Review-2005-024.pdf:5.73MB

no abstracts in English

JAEA Reports

Low temperature tritium release experiment from lithium titanete breeder material

Tsuchiya, Kunihiko; Kawamura, Hiroshi; Nakamichi, Masaru*; Sagawa, Hisashi

JAERI-Tech 2005-013, 56 Pages, 2005/03

JAERI-Tech-2005-013.pdf:6.4MB

no abstracts in English

JAEA Reports

Examination on detaching method of an irradiated mock-up with Li$$_{2}$$TiO$$_{3}$$ pebble bed from the core of JMTR

Ikeshima, Yoshiaki; Ishida, Takuya*; Tsuchiya, Kunihiko; Tomita, Kenji; Ebisawa, Hiroyuki; Magome, Hirokatsu; Nakamichi, Masaru*; Kitajima, Toshio; Kawamura, Hiroshi

JAERI-Tech 2005-005, 37 Pages, 2005/02

JAERI-Tech-2005-005.pdf:7.59MB

no abstracts in English

Journal Articles

In-situ tritium recovery behavior from Li$$_{2}$$TiO$$_{3}$$ pebble bed under neutron pulse operation

Tsuchiya, Kunihiko; Kikukawa, Akihiro*; Hoshino, Tsuyoshi; Nakamichi, Masaru; Yamada, Hirokazu*; Yamaki, Daiju; Enoeda, Mikio; Ishitsuka, Etsuo; Kawamura, Hiroshi; Ito, Haruhiko; et al.

Journal of Nuclear Materials, 329-333(Part2), p.1248 - 1251, 2004/08

https://doi.org/10.1016/j.jnucmat.2004.04.238
 Times Cited Count：10 Percentile：54.77(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Thermal property measurements on Li$$_{2}$$TiO$$_{3}$$ added with TiO$$_{2}$$

Hoshino, Tsuyoshi; Kobayashi, Takeshi*; Nashimoto, Makoto*; Kawamura, Hiroshi; Dokiya, Masayuki*; Terai, Takayuki*; Yamawaki, Michio*; Takahashi, Yoichi*

JAERI-Conf 2004-012, p.140 - 147, 2004/07

https://jopss.jaea.go.jp/pdfdata/JAERI-Conf-2004-012.pdf

no abstracts in English

Journal Articles

Hydrogen isotope behavior on Li$$_{2}$$TiO$$_{3}$$

Ryan, O.*; Oda, Takuji*; Oya, Yasuhisa*; Tanaka, Satoru*; Tsuchiya, Kunihiko

JAERI-Conf 2004-012, p.136 - 139, 2004/07

https://jopss.jaea.go.jp/pdfdata/JAERI-Conf-2004-012.pdf

no abstracts in English

Journal Articles

Fabrication and characterization of $$^{6}$$Li-enriched Li$$_{2}$$TiO$$_{3}$$ pebbles by wet process

Tsuchiya, Kunihiko; Hoshino, Tsuyoshi; Kawamura, Hiroshi; Takayama, Tomoo*

Journal of the Ceramic Society of Japan, Supplement, Vol.112, No.1 (CD-ROM), p.S183 - S186, 2004/05

no abstracts in English

Journal Articles

High-temperature thermophysical property measurements on non-stoichiometric composition of Li$$_{2}$$TiO$$_{3}$$

Hoshino, Tsuyoshi; Kobayashi, Takeshi*; Nashimoto, Makoto*; Kawamura, Hiroshi; Terai, Takayuki*; Yamawaki, Michio*; Takahashi, Yoichi*

Journal of the Ceramic Society of Japan, Supplement, Vol.112, No.1 (CD-ROM), p.S354 - S357, 2004/05

no abstracts in English

Journal Articles

Compatibility test between Be$$_{12}$$Ti and Li$$_{2}$$TiO$$_{3}$$

Nakamichi, Masaru; Kawamura, Hiroshi; Uchida, Munenori*

Fusion Engineering and Design, 69(1-4), p.257 - 261, 2003/09

https://doi.org/10.1016/S0920-3796(03)00350-8
 Times Cited Count：10 Percentile：55.36(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Effective thermal conductivity of a Li$$_{2}$$TiO$$_{3}$$ pebble bed for a demo blanket

Hatano, Toshihisa; Enoeda, Mikio; Suzuki, Satoshi; Kosaku, Yasuo; Akiba, Masato

Fusion Science and Technology, 44(1), p.94 - 98, 2003/07

https://doi.org/10.13182/FST03-A316
 Times Cited Count：28 Percentile：84.41(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Disordering in Li$$_{2}$$TiO$$_{3}$$ irradiated with high energy ions

Nakazawa, Tetsuya; Grismanovs, V.*; Yamaki, Daiju; Katano, Yoshio*; Aruga, Takeo

Nuclear Instruments and Methods in Physics Research B, 206, p.166 - 170, 2003/05

https://doi.org/10.1016/S0168-583X(03)00712-2
 Times Cited Count：33 Percentile：87.41(Instruments & Instrumentation)

Li$$_{2}$$TiO$$_{3}$$ samples with high energy oxygen ions were examined by the use of Raman spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The Raman spectra of the irradiated samples do not show any evidence of destruction of Li$$_{2}$$TiO$$_{3}$$ structure. On the other hand, the Bragg peak intensity of XRD is decreased with the increasing the ion fluence. Especially, the intensity of (002) supercell peak is drastically reduced after the irradiation to 1.2E+19 ions/m$$^{2}$$. This result implies that partial site mixing between Li and Ti atoms is induced by the irradiation. The transition to such a disordering is observed also by SEM examination; the grain structure at surface layer is vanished after the irradiation.

JAEA Reports

Thermal cycle test of elemental mockups of ITER breeding blanket

Yanagi, Yoshihiko*; Kosaku, Yasuo; Hatano, Toshihisa; Kuroda, Toshimasa*; Enoeda, Mikio; Akiba, Masato

JAERI-Tech 2002-046, 45 Pages, 2002/05

JAERI-Tech-2002-046.pdf:2.61MB

no abstracts in English

Journal Articles

Neutronic and thermal estimation of blanket in-pile mockup with Li$$_{2}$$TiO$$_{3}$$ pebbles

Nagao, Yoshiharu; Nakamichi, Masaru; Tsuchiya, Kunihiko; Kawamura, Hiroshi

Fusion Engineering and Design, 58-59, p.673 - 678, 2001/11

https://doi.org/10.1016/S0920-3796(01)00525-7
 Times Cited Count：0 Percentile：0.00(Nuclear Science & Technology)

no abstracts in English

25 (Records 1-20 displayed on this page)