JOPSS - Search Results

Journal Articles

Comparison of field data and numerical simulation of nitrate evolution in groundwater using the model of nitrate evolution

Abe, Toru*; Hirano, Fumio; Mihara, Morihiro; Honda, Akira

Genshiryoku Bakkuendo Kenkyu (CD-ROM), 27(1), p.3 - 11, 2020/06

https://doi.org/10.3327/jnuce.27.1_3

Degradation of TRU waste in a geological disposal facility may cause the formation of a nitrate plume. A Nitrate Evolution model due to mineral reactions, microbial activity, and metal corrosiON (NEON) has therefore been developed to evaluate the safety case for geological disposal of TRU waste. Small scale laboratory experiments can be reproduced satisfactorily, however, it is necessary to demonstrate the applicability of the NEON model on scales relevant to the geological disposal of TRU waste. In the current study, an industrial analogue of a nitrate plume from the pollution of groundwater from nitrate fertilizers used on Ikuchi Island, Japan was selected to test the applicability of the NEON model. Concentration profiles of nitrate ions in the groundwater were successfully reproduced over the hundreds of meters scale demonstrating the applicability of the NEON model in evaluating the chemical behavior of a nitrate plume derived from the geological disposal of TRU waste.

Journal Articles

The Separation mechanism of Am(III) from Eu(III) by diglycolamide and nitrilotriacetamide extraction reagents using DFT calculations

Kaneko, Masashi; Watanabe, Masayuki; Matsumura, Tatsuro

Dalton Transactions, 45(43), p.17530 - 17537, 2016/11

AA2016-0311.pdf:1.49MB

https://doi.org/10.1039/C6DT03002E

Times Cited Count：33 Percentile：87.63(Chemistry, Inorganic & Nuclear)

Relativistic density functional calculations were applied to study the separation behaviors of Am(III) ion from Eu(III) ion by diglycolamide (DGA) and nitrilotriacetamide (NTA) ligands in order to understand the difference in the separation mechanism of their reagents. The complexation reaction was modeled on the basis of previous experimental studies. The calculated energies based on stabilization by complex formation at the ZORA-B2PLYP/SARC level predicted that the DGA reagent preferably coordinated to Eu(III) ion when compared with Am(III) ion. In contrast, the NTA reagent selectively coordinated to Am(III) ion when compared with Eu(III) ion. These results reproduced the experimental selectivity of DGA and NTA ligands toward Eu(III) and Am(III) ions. Mulliken's population analyses implied that the difference in the contribution of the bonding property between the f-orbital of Am and donor atoms determined the comparative stability of Eu and Am complexes.

Journal Articles

Model magnet development of D1 beam separation dipole for the HL-LHC upgrade

Nakamoto, Tatsushi*; Sugano, Michinaka*; Xu, Q.*; Kawamata, Hiroshi*; Enomoto, Shun*; Higashi, Norio*; Idesaki, Akira; Iio, Masami*; Ikemoto, Yukio*; Iwasaki, Ruri*; et al.

IEEE Transactions on Applied Superconductivity, 25(3), p.4000505_1 - 4000505_5, 2015/06

https://doi.org/10.1109/TASC.2014.2361404

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

Recently, development of superconducting magnet system with high radiation resistance has been demanded for application in accelerator facilities such as CERN LHC. In order to realize superconducting magnet system with high radiation resistance, it is necessary to develop electrical insulator with high radiation resistance because the electrical insulator is made of organic materials whose radiation resistance is inferior to that of inorganic materials. We developed a glass fiber reinforced plastic with bismaleimide-triazine resin. The developed material showed excellent radiation resistance; the material evolved gases of 510 $^{-5}$ mol/g and maintained flexural strength of 640MPa (90% of initial value).

Journal Articles

Improvement of heat stability of poly(lactic acid) by radiation crosslinking

Nagasawa, Naotsugu

Nihon Setchaku Gakkai-Shi, 41(10), p.420 - 426, 2005/10

http://ci.nii.ac.jp/naid/10017145547

no abstracts in English

Journal Articles

Application of poly(lactic acid) modified by radiation crosslinking

Nagasawa, Naotsugu; Kaneda, Ayako*; Kanazawa, Shinichi*; Yagi, Toshiaki; Mitomo, Hiroshi*; Yoshii, Fumio; Tamada, Masao

Nuclear Instruments and Methods in Physics Research B, 236(1-4), p.611 - 616, 2005/07

https://doi.org/10.1016/j.nimb.2005.04.052

Times Cited Count：80 Percentile：97.88(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Improvement of heat stability of poly( $_{L}$ -lactic acid) by radiation-induced crosslinking

Mitomo, Hiroshi*; Kaneda, Ayako*; Tran, M. Q.*; Nagasawa, Naotsugu; Yoshii, Fumio

Polymer, 46(13), p.4695 - 4703, 2005/06

https://doi.org/10.1016/j.polymer.2005.03.088

Times Cited Count：116 Percentile：94.31(Polymer Science)

no abstracts in English

Journal Articles

Development of novel plastics by radiation technology

Nagasawa, Naotsugu; Yagi, Toshiaki

Science & Technology Journal, 13(10), p.20 - 21, 2004/10

no abstracts in English

Journal Articles

Combinatorial protein design

Kono, Hidetoshi; Saven, J. G.*

Seibutsu Butsuri, 43(4), p.186 - 191, 2003/07

https://doi.org/10.2142/biophys.43.186

no abstracts in English

Journal Articles

$^{151}$ Eu Mssbauer spectroscopic study on the Eu $_{y}$ M $_{1-y}$ O $_{2-y}$ (0y1.0)(M=Th, U)

Masaki, Nobuyuki; Otobe, Haruyoshi; Nakamura, Akio; Harada, Daijitsu*; Ito, Kentaro*; Sasaki, Yoshinobu*; Hinatsu, Yukio*

Journal of Nuclear Science and Technology, 39(Suppl.3), p.217 - 220, 2002/11

http://www.tandfonline.com/doi/abs/10.1080/00223131.2002.10875448

no abstracts in English

Journal Articles

Post-irradiation examination of uranium-based rock-like oxide fuels

Kuramoto, Kenichi; Yamashita, Toshiyuki; Shiratori, Tetsuo

Progress in Nuclear Energy, 38(3-4), p.423 - 426, 2001/02

https://doi.org/10.1016/S0149-1970(00)00150-5

Times Cited Count：6 Percentile：44.09(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Doppler effect experiment of resonance materials for rock like oxide fuels

Nakano, Yoshihiro; Ando, Masaki; Okajima, Shigeaki; Takano, Hideki; Akie, Hiroshi

Progress in Nuclear Energy, 38(3-4), p.343 - 346, 2001/02

https://doi.org/10.1016/S0149-1970(00)00131-1

Times Cited Count：1 Percentile：12.01(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Current status of VEGA program

Hidaka, Akihide; Nakamura, Takehiko; Nishino, Yasuharu; Kanazawa, Hiroyuki; Hashimoto, Kazuichiro; Harada, Yuhei; Kudo, Tamotsu; Uetsuka, Hiroshi; Sugimoto, Jun

JAERI-Conf 99-005, p.211 - 218, 1999/07

https://doi.org/10.11484/jaeri-conf-99-005

no abstracts in English

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