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C control rods in Fukushima Daiichi nuclear reactors during meltdown; B-Li isotopic signatures in cesium-rich microparticlesFueda, Kazuki*; Takami, Ryu*; Minomo, Kenta*; Morooka, Kazuya*; Horie, Kenji*; Takehara, Mami*; Yamasaki, Shinya*; Saito, Takumi*; Shiotsu, Hiroyuki; Onuki, Toshihiko*; et al.
Journal of Hazardous Materials, 428, p.128214_1 - 128214_10, 2022/04
Times Cited Count：7 Percentile：66.01(Engineering, Environmental)Nishimura, Shoichiro*; Torii, Hiroyuki*; Fukao, Yoshinori*; Ito, Takashi; Iwasaki, Masahiko*; Kanda, Sotaro*; Kawagoe, Kiyotomo*; Kawall, D.*; Kawamura, Naritoshi*; Kurosawa, Noriyuki*; et al.
Physical Review A, 104(2), p.L020801_1 - L020801_6, 2021/08
Times Cited Count：13 Percentile：84.11(Optics)
Kitamura, Satoshi; Matsuda, Fumio*; Toge, Takayuki*; Sakakibara, Keiko*; Yamazaki, Mami*; Saito, Kazuki*; Narumi, Issei
JAEA-Review 2010-065, JAEA Takasaki Annual Report 2009, P. 60, 2011/01
Kitamura, Satoshi; Matsuda, Fumio*; Toge, Takayuki*; Sakakibara, Keiko*; Yamazaki, Mami*; Saito, Kazuki*; Narumi, Issei
Plant Journal, 62(4), p.549 - 559, 2010/05
Times Cited Count：83 Percentile：89.36(Plant Sciences)Arabidopsis TT19 encodes a GST-like protein that is involved in the accumulation of proanthocyanidins (PAs) in the seed coat. PA accumulation sites in tt19 immature seeds were observed as small vacuolar-like structures, which show unique thick morphology by differential interference contrast microscopy. The distribution pattern of the thick structures overlapped the location of PA accumulation sites in tt19. Metabolic profiling of the solvent-soluble fraction demonstrated that PA derivatives such as epicatechins and epicatechin oligomers, although highly accumulated in the wild-type, were absent in tt19. We also revealed that tt12 specifically accumulated glycosylated epicatechins, the putative transport substrates for TT12. Given the cytosolic localization of functional GFP-TT19 proteins, our results suggest that TT19, which acts prior to TT12, functions in cytosol for regular accumulation of PA precursors such as epicatechin and glycosylated epicatechin in the vacuole.
Yoshimoto, Masahiro; Takeda, Osamu; Kawase, Masato; Yamazaki, Yoshio; Kinsho, Michikazu; Saito, Yoshio*; Kabeya, Zenzaburo*
Proceedings of 1st International Particle Accelerator Conference (IPAC '10) (Internet), p.3930 - 3932, 2010/05
At the 3 GeV RCS (Rapid Cycling Synchrotron) in J-PARC (Japan Proton Accelerator Research Complex), the scheme of H
charge exchange injection using stripping foils is adopted. The charge exchange system is composed of three stripping foil devices. The first stripping foil device, which converts the H
beam from the 181 MeV LINAC into the H beam, can replace the broken foil with new one in vacuum remotely and automatically. In September 2007, mechanical trouble with the first stripping foil device had occurred just before the RCS beam commissioning was started. The magnetic coupling of the transfer rod had been decoupled and the transfer rod had been broken which was caught in the vacuum gate valve. We studied the trouble cause, re-examined the structural design and the selection for the material, and then verified the specification from endurance tests with sample pieces. Then the improved device was installed in the ring in September 2008.
Tomiyasu, Hiroshi*; Nomura, Mitsuo; Yamazaki, Hitoshi; Hayashibara, Kenichi
JNC TY6400 2004-004, 18 Pages, 2004/07
JNC-TY6400-2004-004.pdf:0.65MB
This study has been performed to establish a method to recover uranium from uranium containing NaF and CaF2 wastes without forming any secondary wastes. For this purpose the use of supercritical carbon dioxide was primarily considered. Although TBP has been generally used with supercritical carbon dioxide to extract uranium, the use of TBP was ruled out in the present study because of the formation of secondary wastes due to phosphorous oxides. Among a variety of ligands, we have choused acetylacetone as a ligand for the extraction of uranyl ion. Acetylacetone is a strong chelate ligand, which dose not gives any solid residual after vaporization. As a matter of fact, our experimental result indicates that acetylacetone is a stronger ligand for uranyl ion compared with TBP., because uranyl TBP complex is replaced by acetylacetonate resulting in the formation of acetylaetonate complex. Experiments were carried out to recover uranium from the NaF waste by use of supercritical carbon dioxide containing acetylacetone, and it was found that uranium was only partly extracted to carbon dioxide phase. This might be attributed to the strong uranium fluoride complexes and also to the distribution of uranium to the inside of NaF pellets. In order to recover uranium from the NaF waste, another method was also carried out as follows: dissolve NaF waste by hot water, then add NaOH to the solution as to form the precipitation of uranium hydrolyzed species, where uranium can be recovered at high yield using centrifugation, and finally the addition of ethanol yields the NaF powder. In conclusion, the recovery of uranium from fluoride wastes seems to be difficult by the method using supercritical carbon dioxide; however, we have established a new method to recover both uranium and NaF in high yield.
Aihara, Masahiko*; Yanai, Shinjiro*; Shimazaki, Yohei*; Nomura, Mitsuo; Yamazaki, Hitoshi; Hayashibara, Kenichi
JNC TY6400 2004-003, 93 Pages, 2004/07
JNC-TY6400-2004-003.pdf:2.19MB
To run the nuclear fuel cycle safely, new treatment and disposal technologies of radioactive waste from the cycle must be developed. Super critical CO2 extraction attracts attention as a technology to recover the uranium in low level solid waste. In this paper it is proposed that use of carbonation of calcium oxide and decarbonation of calcium carbonate for the system which recovers and reuses high pressure carbon dioxide discharge form the super-critical process. Conducting the cycle reaction experiment at the high pressure of carbon dioxide with the calcium oxide absorbent, the reaction velocity analysis, the structural analysis of solid reactant, the numerical analysis of the reaction characteristic and the recover-reuse process were discussed. The rate of carbonation at about 2MPa was most rapid with the stable reaction conversion of about 0.4 through 5 cycles. In the range of these experiment conditions The solid reactant was observed consisting of about 1-10 mm particles of the aggregate of minute grains. It was found that a blockade of the void between the grains after carbonation at high pressure CO2 caused the reduction of conversion and rate of carbonation. The heat consumption of CO2 recovery for the recover-reuse system was estimated by use of the reaction analysis data.
Kasagi, Jirota*; Yamazaki, Hirohito*; Galster, W.*; Saito, Akiko*; Harada, Hideo; Furutaka, Kazuyoshi; Shcherbakov, O.
JNC TY8400 2002-002, 64 Pages, 2002/05
JNC-TY8400-2002-002.pdf:1.81MB
no abstracts in English
Kuroda, Toshimasa*; Yoshida, Hiroshi; Takatsu, Hideyuki; Seki, Yasushi; Noda, Kenji; Watanabe, H.; Koizumi, Koichi; Nishio, Satoshi; *; *; et al.
JAERI-M 91-133, 191 Pages, 1991/08
no abstracts in English
; ; *; ; *; Kikuchi, Yasuyuki; ; ; *; *; et al.
JAERI-M 85-082, 352 Pages, 1985/07
no abstracts in English
Tone, Tatsuzo; Shiraishi, K.; ; ; *; ; *; *; *; *; et al.
JAERI-M 82-179, 49 Pages, 1982/11
no abstracts in English
Yamamoto, Masahiko; Surugaya, Naoki; Taguchi, Shigeo; Ishibashi, Atsushi; Horigome, Kazushi; Yamazaki, Hitoshi; Ogura, Hiroshi; Watahiki, Hiromi; Watanabe, Masahisa; Kurosawa, Akira; et al.
no journal, ,
no abstracts in English
Kitamura, Satoshi; Matsuda, Fumio*; Toge, Takayuki*; Sakakibara, Keiko*; Yamazaki, Mami*; Saito, Kazuki*; Narumi, Issei
no journal, ,
Arabidopsis TRANSPARENT TESTA19 (TT19) is involved in the accumulation of proanthocyanidins (PAs) in the seed coat. PA accumulation sites in tt19 immature seeds were observed as small vacuolar-like structures, whereas those in tt12, a mutant of the tonoplast-bound transporter of PAs, and tt12 tt19 were observed at peripheral regions of small vacuoles. We found that tt19 immature seeds had small spherical structures showing unique thick morphology by differential interference contrast microscopy. The thick structures were outlined with GFP-TT12 proteins in tt19. Metabolic profiling demonstrated that PA derivatives such as epicatechins and epicatechin oligomers were absent in tt19. Given the cytosolic localization of functional GFP-TT19 proteins, the PA pathway in Arabidopsis seed coat is discussed in relation to the subcellular localization of PA metabolites.
Kitamura, Satoshi; Narumi, Issei; Toge, Takayuki*; Yamazaki, Mami*; Saito, Kazuki*; Matsuda, Fumio*; Sakakibara, Keiko*
no journal, ,
no abstracts in English
Harada, Satoshi*; Ehara, Shigeru*; Ishii, Keizo*; Yamazaki, Hiromichi*; Matsuyama, Shigeo*; Sato, Takahiro; Kamiya, Tomihiro; Sera, Koichiro*; Saito, Yoshihiro*
no journal, ,
no abstracts in English
Matsui, Yoshiki; Kimura, Yoshiki; Umino, Yuji*; Hosoi, Masaharu*; Matsumoto, Tetsuya*; Shinohara, Nobuo; Yamazaki, Hitoshi; Yamaguchi, Tomoki
no journal, ,
The Integrated Support Center for Nuclear Nonproliferation and Nuclear Security (ISCN) of the Japan Atomic Energy Agency (JAEA) is developing technologies for nuclear forensics to identify the origin and intended use of nuclear and radioactive materials. In order to share the experience on nuclear forensics analysis and to improve analytical techniques in the international community, the Nuclear Forensics International Technical Working Group (ITWG) regularly holds the Collaborative Materials Exercise (CMX). The ISCN participated in the 7th exercise (CMX-7) this time. This paper reports the experience of the exercise, and discusses nuclear forensics analytical capability of the ISCN based on the review of the exercise.
Matsui, Yoshiki; Kimura, Yoshiki; Umino, Yuji*; Hosoi, Masaharu*; Matsumoto, Tetsuya*; Shinohara, Nobuo; Yamazaki, Hitoshi; Yamaguchi, Tomoki
no journal, ,
