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Journal Articles

New precise measurement of muonium hyperfine structure interval at J-PARC

Ueno, Yasuhiro*; Aoki, Masaharu*; Fukao, Yoshinori*; Higashi, Yoshitaka*; Higuchi, Takashi*; Iinuma, Hiromi*; Ikedo, Yutaka*; Ishida, Keiichi*; Ito, Takashi; Iwasaki, Masahiko*; et al.

Hyperfine Interactions, 238(1), p.14_1 - 14_6, 2017/11

 Times Cited Count:2 Percentile:12.39

Journal Articles

New muonium HFS measurements at J-PARC/MUSE

Strasser, P.*; Aoki, Masaharu*; Fukao, Yoshinori*; Higashi, Yoshitaka*; Higuchi, Takashi*; Iinuma, Hiromi*; Ikedo, Yutaka*; Ishida, Keiichi*; Ito, Takashi; Iwasaki, Masahiko*; et al.

Hyperfine Interactions, 237(1), p.124_1 - 124_9, 2016/12

 Times Cited Count:5 Percentile:6.11

Journal Articles

A Possible overestimation of the effect of acetylation on lysin residues in KQ mutant analysis

Fujimoto, Hirofumi*; Higuchi, Mariko; Koike, Manabu*; Ode, Hirotaka*; Pinak, M.; Kotulic Bunta, J.*; Nemoto, Toshiyuki*; Sakudo, Takashi*; Honda, Naoko*; Maekawa, Hideaki*; et al.

Journal of Computational Chemistry, 33(3), p.239 - 246, 2012/01

 Times Cited Count:18 Percentile:43.4(Chemistry, Multidisciplinary)

Lysine acetylation is one of the most common protein post transcriptional modifications. The acetylation effects of lysine residues on Ku protein were examined herein applying several computer simulation techniques. Acetylation of the lysine residues did not reduce the affinity between Ku and its substrate, DNA, in spite of the fact that the substitution of lysine with glutamine (KQ mutant) reduced the affinity of Ku for DNA, or the substitution of lysine with arginine (KR mutant) did not reduce it, as previously reported in experimental studies. These results suggest that the effects of in vivo acetylation may be overestimated when the KQ mutant is employed in mimicry of the acetylated protein.

Journal Articles

A Dinuclear Ni($$mu$$-H)Ru complex derived from H$$_{2}$$

Ogo, Seiji*; Kabe, Ryota*; Uehara, Keiji*; Kure, Bunsho*; Nishimura, Takashi*; Menon, S. C.*; Harada, Ryosuke*; Fukuzumi, Shunichi*; Higuchi, Yoshiki*; Ohara, Takashi; et al.

Science, 316(5824), p.585 - 587, 2007/04

 Times Cited Count:201 Percentile:0.49(Multidisciplinary Sciences)

A novel dinuclear nickel-ruthenium complex with a bridging hydrido ligand, a Ni($$mu$$-H)Ru complex, was obtained from the reaction of a dinuclear NiRu aqua complex with dihydrogen (H$$_{2}$$) in water under ambient conditions. The structure of the Ni($$mu$$-H)Ru complex was unequivocally determined by neutron analysis. This is the first crystal structure of (six-coordinated Ni)($$mu$$-H)M (M=transition metal atoms) that is similar to the core structure of the proposed active form of the [NiFe]hydrogenase.

Journal Articles

Waste management implications of advanced fuel cycle systems using Fast Reactors (FR)

Funasaka, Hideyuki; Koma, Yoshikazu; Sato, Koji; Nakajima, Yasuo; Shiotani, Hiroki; Kato, Atsushi; Higuchi, Tatsuya; Namba, Takashi

Proceedings of International Waste Management Symposium 2006 (WM '06) (CD-ROM), 13 Pages, 2006/02

Feasibility Study on commercialized FR cycle systems has been carried out by a Japanese joint team with the participation of all parties concerned in Japan since 1999. The result of the PhaseII (JFY 2001-2005) will work out until March 2006, and then the prospective of the promising concepts and the key issues for the commercialization will be summarized. In this paper, the candidate reprocessing systems studied in the Phase II are reviewed from the view point of compatibility with the reduction of environmental burden.

JAEA Reports

Feasibility Study on Commercialization of Fast Breeder Reactor Cycle Systems Interim Report of Phase II; Technical Study Report for Reactor Plant Systems

Konomura, Mamoru; Ogawa, Takashi; Okano, Yasushi; Yamaguchi, Hiroyuki; Murakami, Tsutomu; Takaki, Naoyuki; Nishiguchi, Youhei; Sugino, Kazuteru; Naganuma, Masayuki; Hishida, Masahiko; et al.

JNC-TN9400 2004-035, 2071 Pages, 2004/06

JNC-TN9400-2004-035.pdf:76.42MB

The attractive concepts for Sodium-, lead-bismuth-, helium- and water-cooled FBRs have been created through using typical plant features and employing advanced technologies. Efforts on evaluating technological prospects of feasibility have been paid for these concepts. Also, it was comfirmed if these concepts satisfy design requierments of capability and performance presumed in the feasibilty study on commertialization of Fast Breeder Reactor Systems. As results, it was concluded that the selection of sodium-cooled reactor was most rational for practical use of FBR technologies in 2015.

JAEA Reports

Design Study on In-core Breeding Concept Using Annular Thick Fuel Pins

; Takashita, Hirofumi; Okawa, Tsuyoshi; Higuchi, Masashi*; Abe, Tomoyuki

JNC-TN8400 2003-019, 185 Pages, 2003/08

JNC-TN8400-2003-019.pdf:11.78MB

We are studying on an in-core breeding concept as a candidate for a practical FBR fuel cycle system attainable in an early stage on the premise that sodium coolant and mixed oxide fuel should be adopted, since the technical issues with these combination are most advanced and common with the fuel cycle for a LWR-MOX system. An enhancement of fuel volume fraction using thick fuel pins enables the in-core breeding. The fuel material flow can be greatly lessened by minimizing amount of the blanket with the in-core breeding core. The low material flow leads to significant reduction of the fuel cycle cost. We investigated a 3500MWth large-scale core adjusting several conditions presented in JNC's feasibility study program for a commercialized FBR system in this study. These were shown in this study that a discharged burnup averaged over the core and the blanket could reach approximately 130GWd/t (core averaged about 150GWd/t) within the maximum fast neutron fluence about 5x1023/cm2, that the small reactivity loss with burnup easily enabled long operation and that stable power distribution during operation significantly improved hydraulic property in this type core. We investigated measures to reduce sodium void reactivity, because core height enlargement to enhance neutron efficiency caused the increase of sodium void reactivity.We also investigated feasibility of a high breeding type core with low burnup considering a variety of FBR introducing scenarios and a trade-off correlation between breeding performance and burnup extension. The performance in this core design at core disruption accidents is not revealed enough. Further investigation should be made in detail to confirm that the in-core breeding concept could be accepted in a safety aspect.

Journal Articles

Fermi surface of heavy Fermion compounds CeTIn$$_5$$ (T=Rh, Ir, and Co); Band-calculation and tight-binding approach

Maehira, Takahiro; Takimoto, Tetsuya; Hotta, Takashi; Ueda, Kazuo*; Higuchi, Masahiko*; Hasegawa, Akira*

Journal of the Physical Society of Japan, Vol.71, Supplement, p.285 - 287, 2002/00

 Times Cited Count:8 Percentile:48.71(Physics, Multidisciplinary)

Recently a new family of Ce-based heavy fermion superconductor $${rm CeTIn_{5}}$$ (T=Rh, Ir, and Co) has been reported. The dHvA effect has been successfully observed in $${rm CeIrIn_{5}}$$ and $${rm CeCoIn_{5}}$$.The angular dependence of dHvA branches is well explained by a quasi-two dimensional Fermi surface(F.S.). In order to clarify band structures of Ce-115 systems such as CeIrIn$$_5$$ and CeCoGa$$_5$$, two-step strategy is here employed. In the first step, the F.S. are derived by using the RLAPW method. In the next step, the band structure near the Fermi level is reanalyzed by using a simple tight-binding model. Namely, hopping amplitudes of $$f$$-electrons between neighboring Ce ions are parameterized to reproduce the F.S. obtained in the band-calculation. By further adding the Coulomb interaction terms into this tight-binding model, a simple many-body Hamiltonian for Ce-compounds can be constructed. This Hamiltonian opens a way to discuss magnetism and superconductivity in $$f$$-electron systems from the microscopic viewpoint.

Oral presentation

Engneering scale test of FBR fuel disassembly and pin bundle shearing technology

Wakui, Ryohei; Higuchi, Hidetoshi; Kitagaki, Toru; Washiya, Tadahiro; Takeuchi, Masayuki; Kobayashi, Tsuguyuki*; Watanabe, Masayuki; Suganuma, Takashi

no journal, , 

no abstracts in English

Oral presentation

Development of the mechanical disassembly system for FBR fuel; Study of the reliable cutting condition

Higuchi, Hidetoshi; Wakui, Ryohei; Watanabe, Masayuki; Suganuma, Takashi; Kitagaki, Toru; Takeuchi, Masayuki; Washiya, Tadahiro

no journal, , 

no abstracts in English

Oral presentation

FaCT phase-I evaluation on advanced aqueous reprocessing process, 2; Disassembly and shearing technologies for FBR fuel

Kitagaki, Toru; Takeuchi, Masayuki; Higuchi, Hidetoshi; Wakui, Ryohei; Koizumi, Kenji; Suganuma, Takashi; Washiya, Tadahiro

no journal, , 

no abstracts in English

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