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Vostner, A.*; Pong, I.*; Bessette, D.*; Devred, A.*; Sgobba, S.*; Jung, A.*; Weiss, K.-P.*; Jewell, M. C.*; Liu, S.*; Yu, W.*; et al.
IEEE Transactions on Applied Superconductivity, 23(3), p.9500705_1 - 9500705_5, 2013/06
Times Cited Count：12 Percentile：52.85(Engineering, Electrical & Electronic)The ITER Cable-In-Conduit Conductor (CICC) used in the superconducting magnet system consists of a cable made of 300 to 1440 strands housed in a stainless steel tube (a.k.a. jacket or conduit). There are circular, square, as well as circle-in-square jackets, made of either a very low carbon AISI 316LN grade stainless steel or a high Mn austenitic stainless steel developed for ITER called JK2LB. Selected mechanical properties of the base material and weld joint were tested at room temperature and/or cryogenic temperatures (
7 K). The Domestic Agencies (DAs) reference laboratories and the ITER-IO appointed reference laboratories, CERN and Karlsruhe Institute of Technology (KIT) performed mechanical tests. This paper will compare the test results (e.g. elongation to failure) from different laboratories.
Nakajima, Hideo; Hemmi, Tsutomu; Iguchi, Masahide; Nabara, Yoshihiro; Matsui, Kunihiro; Chida, Yutaka; Kajitani, Hideki; Takano, Katsutoshi; Isono, Takaaki; Koizumi, Norikiyo; et al.
Proceedings of 24th IAEA Fusion Energy Conference (FEC 2012) (CD-ROM), 8 Pages, 2013/03
The ITER organization and 6 Domestic Agencies (DA) have been implementing the construction of ITER superconducting magnet systems. Four DAs have already started full scale construction of Toroidal Field (TF) coil conductors. The qualification of the radial plate manufacture has been completed, and JA and EU are ready for full scale construction. JA has qualified full manufacturing processes of the winding pack with a 1/3 prototype and made 2 full scale mock-ups of the basic segments of TF coil structure to optimize and industrialize the manufacturing process. Preparation and qualification of the full scale construction of the TF coil winding is underway by EU. Procurement of the manufacturing equipment is near completion and qualification of manufacturing processes has already started. The constructions of other components of the ITER magnet systems are also going well towards the main goal of the first plasma in 2020.
Libeyre, P.*; Bessette, D.*; Jewell, M.*; Jong, C.*; Lyraud, C.*; Rodriguez-Mateos, M.*; Hamada, Kazuya; Reiersen, W.*; Martovetsky, N.*; Rey, C.*; et al.
IEEE Transactions on Applied Superconductivity, 22(3), p.4201104_1 - 4201104_4, 2012/06
Times Cited Count：7 Percentile：41.31(Engineering, Electrical & Electronic)The Central Solenoid (CS) of the ITER magnet system will play a major role in tokamak operation, providing not only the major part of the inductive flux variation required to drive the plasma but also contributing to the shaping of the field lines and to vertical stability control. To meet these requirements, the design has been optimised by splitting the CS into six independently powered coils enclosed inside an external structure which provides vertical precompression thus preventing separation of the coils and, additionally, acting as a support to net resulting loads. To ensure that the CS design meets the ITER criteria, several analyses are performed along with a series of R&D trials to qualify the technologies to be used for the manufacture of the conductor, the coils and the structure.
Burr, T.*; Hamada, M. S.*; Howell, J.*; Suzuki, Mitsutoshi
Journal of Nuclear Science and Technology, 49(2), p.209 - 221, 2012/02
Times Cited Count：7 Percentile：48.18(Nuclear Science & Technology)Solution monitoring (SM) is a type of process monitoring (PM) intended to improve nuclear safeguards in facilities such as reprocessing plants. In SM, volume (V) and mass (M) are monitored in each tank-to-tank transfer and during all wait modes for each tank, resulting in residuals that arise by comparing observations to predictions. The main performance measure is the estimated loss detection probability (DP) for material loss scenarios. This report re-estimates DPs when realistic effects are included in simulated data, such as pump carryover, evaporation, condensation, and mixing/sparging. One challenge involves the need for SM to be part of day-to-day assessment without leading to too many alarms, so we widen the control limits to avoid alarming on innocent process variation effects.
Burr, T.*; Suzuki, Mitsutoshi; Howell, J.*; Jongo, C. E.*; Hamada, M. S.*
Nuclear Instruments and Methods in Physics Research A, 640(1), p.200 - 212, 2011/06
Times Cited Count：9 Percentile：56.9(Instruments & Instrumentation)Process monitoring (PM) is increasingly important in nuclear safeguards as a complement to mass-balance based nuclear materials accounting (NMA). Typically, PM involves more frequent but lower quality measurements than NMA. While NMA estimates special nuclear material (SNM) mass balances and uncertainties, PM often tracks SNM attributes qualitatively or in the case of solution monitoring (SM) tracks bulk mass and volume. Automatic event marking is used in several nuclear safeguards PM systems. All methods are evaluated on both raw and smoothed data, and several smoothing options are compared, including standard filters, hybrid filters, and local kernel smoothing. The main finding is that for real and simulated examples considered, a two-step strategy is most effective. First, any reasonably effective initial smoother is used to provide a good initial guess at change point locations. Second, PLR is applied, looking for one change point at a time.
Fujisawa, Akihide*; Ido, Takeshi*; Shimizu, Akihiro*; Okamura, Shoichi*; Matsuoka, Keisuke*; Iguchi, Harukazu*; Hamada, Yasuji*; Nakano, Haruhisa*; Oshima, Shinsuke*; Ito, Kimitaka*; et al.
Nuclear Fusion, 47(10), p.S718 - S726, 2007/10
Times Cited Count：101 Percentile：95.24(Physics, Fluids & Plasmas)Present status of experiments on zonal flows is overviewed. Innovative use of modern diagnostics has revealed the existence of zonal flows, their spatio-temporal characteristics, their relationship with turbulence, and their effects on confinement. Particularly a number of observations have been accumulated on the oscillatory branch of the zonal flow, dubbed as geodesic acoustic modes suggesting necessity of theories to give their proper description. Several new methods have elucidated the zonal flow generation processes from the turbulence. Further investigation of relationship between the zonal flows and confinement is strongly encouraged as cross-device activity.
Fujisawa, Akihide*; Ido, Takeshi*; Shimizu, Akihiro*; Okamura, Shoichi*; Matsuoka, Keisuke*; Hamada, Yasuji*; Hoshino, Katsumichi; Nagashima, Yoshihiko*; Shinohara, Koji; Nakano, Haruhisa*; et al.
Proceedings of 21st IAEA Fusion Energy Conference (FEC 2006) (CD-ROM), 12 Pages, 2007/03
Present status of experiments on zonal flows is overviewed. Innovative use of traditional and modern diagnostics has revealed unambiguously the existense of the zonal flows, their spatio-temporal caracteristics, their relationship with turbulence, and their effects on confinement. Particularly, a number of observations have been accumulated on the oscillatory branch of zonal flows, dubbed geodesic acoustic modes, suggesting necessity of theories to give their proper description. Furthur investigation of relationship between zonal flows and confinement is strongly encouraged as cross-device activity.
Anghel, A.*; Takahashi, Yoshikazu; Smith, S.*; Pourrahimi, S.*; Zhelamskij, M.*; Blau, B.*; Fuchs, A.*; Heer, B.*; Hamada, Kazuya; Fujisaki, H.*; et al.
Fusion Technology 1996, p.185 - 190, 1996/00
no abstracts in English
C(
O,C[2
])OSugiyama, Yasuharu; Tomita, Yoshiaki; Ikezoe, Hiroshi; Yamanouchi, Y.; Ideno, K.; Hamada, S.; Hijiya, M.*; Sugimitsu, Tsuyoshi *; Mukae, T.*; Nakamoto, K.*; et al.
Physical Review C, 49(6), p.3305 - 3308, 1994/06
Times Cited Count：3 Percentile：18.28(Physics, Nuclear)no abstracts in English
O + O system at E
=145MeVSugiyama, Yasuharu; Tomita, Yoshiaki; Ikezoe, Hiroshi; Yamanouchi, Y.; Ideno, K.; Hamada, S.; Sugimitsu, Tsuyoshi *; Hijiya, M.*; *
Physics Letters B, 312(1-2), p.35 - 39, 1993/08
Times Cited Count：38 Percentile：87.64(Astronomy & Astrophysics)no abstracts in English
; Hamada, S.; ; M.L.Grossbeck*
Journal of Nuclear Materials, 155-157, p.957 - 962, 1988/00
Times Cited Count：20 Percentile：84.83(Materials Science, Multidisciplinary)no abstracts in English
Oue, Atsushi*; Shimizu, Nobuaki*; Tanaka, Atsushi*; Otsuki, Takahiro*; Shinagawa, Masahiko*; Mori, Takahisa*; Saha, M. N.*; Ariful, H. S.*; Islam, S.*; Nakamura, Takako*; et al.
no journal, ,
no abstracts in English
Hoshino, Hiroo*; Shimizu, Nobuaki*; Oue, Atsushi*; Tanaka, Atsushi*; Saha, M. N.*; Shinagawa, Masahiko*; Otsuki, Takahiro*; Mori, Takahisa*; Ariful, H. S.*; Salequl, I. S.*; et al.
no journal, ,
no abstracts in English
