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CNguyen, B. V. C.*; Murakami, Kenta*; Chena, L.*; Phongsakorn, P. T.*; Chen, X.*; Hashimoto, Takashi; Hwang, T.*; Furusawa, Akinori; Suzuki, Tatsuya*
Nuclear Materials and Energy (Internet), 39, p.101639_1 - 101639_9, 2024/06
Times Cited Count：1 Percentile：81.29(Nuclear Science & Technology)Nguyen, P. L.; Daido, Hiroyuki; Yamada, Tomonori; Nishimura, Akihiko; Hasegawa, Noboru*; Kawachi, Tetsuya*
Journal of Laser Applications, 29(4), p.041501_1 - 041501_11, 2017/11
Times Cited Count：22 Percentile：72.17(Materials Science, Multidisciplinary)no abstracts in English
Muramatsu, Toshiharu; Yamada, Tomonori; Hanari, Toshihide; Takebe, Toshihiko; Nguyen, P. L.; Matsunaga, Yukihiro
JAEA-Research 2014-018, 41 Pages, 2014/09
JAEA-Research-2014-018.pdf:42.21MB
In decommissioning works of the Fukushima Daiichi Nuclear Power Plants, it is required that fuel debris solidifying mixed materials of fuels and in-vessel structures should be removed. The fuel debris is considered to have characteristics, such as indefinite shapes, porous bodies, multi-compositions, higher hardness, etc. from the knowledge in the U.S. and the Three Mile Island nuclear power plant. Laser lights are characterized by higher power density, local processability, remote controllabilitiy, etc. and can be performed thermal cutting and crushing-up for various materials which does not depend on fracture toughness. This report describes a research program and research activities in FY2013 aiming at developing removal system of fuel debris by the use of laser lights.
collisions at 
= 200 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Y.*; Al-Bataineh, H.*; Alexander, J.*; Aoki, K.*; Aphecetche, L.*; Armendariz, R.*; et al.
Physical Review D, 84(1), p.012006_1 - 012006_18, 2011/07
Times Cited Count：34 Percentile：75.36(Astronomy & Astrophysics)We report on the event structure and double helicity asymmetry (
) of jet production in longitudinally polarized collisions at = 200 GeV. Photons and charged particles were measured by the PHENIX experiment. Event structure was compared with the results from PYTHIA event generator. The production rate of reconstructed jets is satisfactorily reproduced with the next-to-leading-order perturbative QCD calculation. We measured = -0.0014 
0.0037 at the lowest 
bin and -0.0181 0.0282 at the highest bin. The measured is compared with the predictions that assume various 
distributions.
collisions at = 200 and 62.4 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Armendariz, R.*; et al.
Physical Review C, 83(6), p.064903_1 - 064903_29, 2011/06
Times Cited Count：194 Percentile：99.38(Physics, Nuclear)Transverse momentum distributions and yields for 
, and 
in collisions at = 200 and 62.4 GeV at midrapidity are measured by the PHENIX experiment at the RHIC. We present the inverse slope parameter, mean transverse momentum, and yield per unit rapidity at each energy, and compare them to other measurements at different collisions. We also present the scaling properties such as 
and 
scaling and discuss the mechanism of the particle production in collisions. The measured spectra are compared to next-to-leading order perturbative QCD calculations.
and Au+Au collisions at 
= 200 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Aramaki, Y.*; et al.
Physical Review C, 83(4), p.044912_1 - 044912_16, 2011/04
Times Cited Count：9 Percentile：51.02(Physics, Nuclear)Measurements of electrons from the decay of open-heavy-flavor mesons have shown that the yields are suppressed in Au+Au collisions compared to expectations from binary-scaled collisions. Here we extend these studies to two particle correlations where one particle is an electron from the decay of a heavy flavor meson and the other is a charged hadron from either the decay of the heavy meson or from jet fragmentation. These measurements provide more detailed information about the interaction between heavy quarks and the quark-gluon matter. We find the away-side-jet shape and yield to be modified in Au+Au collisions compared to collisions.
+ collisions at = 200 GeV and scaling properties of hadron productionAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Y.*; Al-Bataineh, H.*; Alexander, J.*; Aoki, K.*; Aphecetche, L.*; Armendariz, R.*; et al.
Physical Review D, 83(5), p.052004_1 - 052004_26, 2011/03
Times Cited Count：185 Percentile：98.32(Astronomy & Astrophysics)The PHENIX experiment at RHIC has measured the invariant differential cross section for production of 
, 
, 
and 
mesons in collisions at = 200 GeV. The spectral shapes of all hadron transverse momentum distributions are well described by a Tsallis distribution functional form with only two parameters, 
and 
, determining the high 
and characterizing the low regions for the spectra, respectively. The integrated invariant cross sections calculated from the fitted distributions are found to be consistent with existing measurements and with statistical model predictions.
Chijimatsu, Masakazu*; B
rgesson, L.*; Fujita, Tomoo; Hernelind, J.*; Jussila, P.*; Nguyen, T. S.*; Rutqvist, J.*; Jing, L.*
Proceedings of 2nd International Conference on Coupled T-H-M-C Processes in Geo-systems; Fundamentals, Modeling, Experiments and Applications (GeoProc 2006), p.254 - 260, 2006/05
In Task A of DECOVALEX-THMC, five research teams study the influence of THM coupling on the safety of the near-field of a typical geological repository for high-level radioactive waste. In order to refine the analyses, the teams calibrated their models with laboratory experiments, including: swelling pressure tests, water uptake tests, thermally gradient tests, and the CEA mock-up THM experiment. This paper describes the mathematical models used by the teams, and compares the results of their calibration with the experimental data.
Nguyen, T. S.*; Brgesson, L.*; Chijimatsu, Masakazu*; Fujita, Tomoo; Hernelind, J.*; Jussila, P.*; Rutqvist, J.*; Jing, L.*
Proceedings of 2nd International Conference on Coupled T-H-M-C Processes in Geo-systems; Fundamentals, Modeling, Experiments and Applications (GeoProc 2006), p.141 - 149, 2006/05
In order to demonstrate the feasibility of geological disposal of spent CANDU fuel in Canada, a safety assessment was performed for a hypothetical repository in the Canadian Shield. The assessment shows that such repository would meet international criteria for dose rate; however, uncertainties in the assumed evolution of the repository were identified. Such uncertainties could be resolved by the consideration of coupled Thermal-Hydro-Mechanical-Chemical (THMC) processes. In Task A of the DECOVALEX-THMC project, THM models will be refined and used to perform near-field simulations of the evolution of the repository in order to address the above uncertainties. This paper presents the definition and rationale of Task A and the preliminary results.
Nguyen, P. L.; Daido, Hiroyuki; Matsunaga, Yukihiro; Yamada, Tomonori; Nishimura, Akihiko; Kawachi, Tetsuya
no journal, ,
Hasegawa, Noboru*; Nishikino, Masaharu*; Mikami, Katsuhiro*; Okada, Hajime*; Kondo, Shuji*; Kawachi, Tetsuya*; Shimada, Yoshinori*; Kurahashi, Shinri*; Kitamura, Toshiyuki*; Kotyaev, O.*; et al.
no journal, ,
no abstracts in English
Yamada, Tomonori; Takebe, Toshihiko; Matsunaga, Yukihiro; Nguyen, P. L.; Muramatsu, Toshiharu
no journal, ,
no abstracts in English
Yamada, Tomonori; Hanari, Toshihide; Takebe, Toshihiko; Matsunaga, Yukihiro; Nguyen, P. L.; Muramatsu, Toshiharu
no journal, ,
no abstracts in English
Nguyen, P. L.; Takebe, Toshihiko; Hanari, Toshihide; Yamada, Tomonori; Muramatsu, Toshiharu
no journal, ,
Muramatsu, Toshiharu; Yamada, Tomonori; Hanari, Toshihide; Takebe, Toshihiko; Matsunaga, Yukihiro; Nguyen, P. L.
no journal, ,
no abstracts in English
Nguyen, P. L.; Daido, Hiroyuki; Matsunaga, Yukihiro; Hanari, Toshihide; Terada, Takaya; Yamada, Tomonori; Kawachi, Tetsuya
no journal, ,
Nguyen, P. L.; Daido, Hiroyuki; Matsunaga, Yukihiro; Terada, Takaya; Yamada, Tomonori; Kawachi, Tetsuya
no journal, ,
Yamada, Tomonori; Nguyen, P. L.; Hanari, Toshihide; Shibata, Takuya; Nishimura, Akihiko; Koyama, Shinichi; Daido, Hiroyuki; Shimada, Yoshinori*; Kotyaev, O.*; Kurahashi, Shinri*
no journal, ,
For decommissioning of the Fukushima Daiichi Nuclear Power Station (NPS) of Tokyo Electric Power Company, Incorporated, it is essential to dispose radioactive wastes resulted from the accident. The wastes cannot be diagnosed and removed manually on account of exposure to high radiation dose. Thus research and development of remote techniques for wastes is indispensable. In terms of remote handling, a fiber delivered laser beam can access into the narrow gap and process the object without repulsive force. That is a powerful advantage of laser processing. We are now developing remote laser techniques for sensing and sampling at the Naraha Remote Technology Development Center.
Muramatsu, Toshiharu; Yamada, Tomonori; Nguyen, P. L.; Yoshiuji, Takahiro*; Kondo, Atsuya*; Furutani, Akira*
no journal, ,
no abstracts in English
Hanari, Toshihide; Yamada, Tomonori; Matsunaga, Yukihiro; Nguyen, P. L.; Nakamura, Masaki; Muramatsu, Toshiharu
no journal, ,
no abstracts in English
