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Hiroki, Akihiro; Sato, Yuichi*; Nagasawa, Naotsugu; Ota, Akio*; Seito, Hajime; Yamabayashi, Hisamichi*; Yamamoto, Takayoshi*; Taguchi, Mitsumasa; Tamada, Masao; Kojima, Takuji
Physics in Medicine & Biology, 58(20), p.7131 - 7141, 2013/10
Times Cited Count：17 Percentile：54.54(Engineering, Biomedical)Kato, Yoshiaki; Yamamoto, Toshio; Takada, Fumiki; Omi, Masao; Nakagawa, Tetsuya
JAEA-Testing 2008-004, 22 Pages, 2008/06
JAEA-Testing-2008-004.pdf:5.88MB
This report is concerned with replacement of the radiation monitors in the lead cells of JMTR Hot Laboratory in the 2007 fiscal year. It was carried out on two of seven systems of the radiation monitors. The designing, producing, installing, adjusting and inspecting were described.
n eigenmodesTodo, Yasushi*; Nakajima, Noriyoshi*; Shinohara, Koji; Takechi, Manabu; Ishikawa, Masao; Yamamoto, Satoshi*
Proceedings of 20th IAEA Fusion Energy Conference (FEC 2004) (CD-ROM), 8 Pages, 2004/11
Linear properties and nonlinear evolutions of an energetic-ion driven instability in a JT-60U plasma were investigated using a simulation code for MHD and energetic particles. The spatial profile of the unstable mode peaks near the plasma center where the safety factor profile is flat. The real frequency of the mode is close to the experimental starting frequency of the fast frequency sweeping mode. The simulation results demonstrate that the energetic ion orbit width and the energetic ion pressure significantly broaden radial profile of the unstable mode. For the experimental condition of JT-60U, the energetic ions broaden the spatial profile of the unstable mode by a factor of 3. The unstable mode is primarily induced by the energetic particles. It is demonstrated that the frequency shifts both upward and downward in the nonlinear evolution at the rate close to that of the fast frequency sweeping mode. In addition to the energetic particle mode in JT-60U, an investigation of TAE in an LHD-like plasma using the simulation code for the helical coordinate system is reported.
Zhang, Z.*; Narumi, Kazumasa; Naramoto, Hiroshi; Wu, Z.*; Yamamoto, Shunya; Miyashita, Atsumi; Tamada, Masao
Journal of Applied Physics, 86(3), p.1317 - 1321, 1999/08
Times Cited Count：11 Percentile：48.51(Physics, Applied)no abstracts in English
; Horiike, Hiroshi; Neyatani, Yuzuru; Matsukawa, Makoto; Ando, Toshiro; Yoshino, Ryuji; Arai, Takashi; Ninomiya, Hiromasa; Yamamoto, Masahiro; ; et al.
Proc. of the 14th Symp. on Fusion Engineering,Vol. 1, p.177 - 180, 1992/00
no abstracts in English
Yamamoto, Masao; ; Asakura, Yoshiro
Proceedings of 3rd International Conference on Nuclear Fuel Reprocessing and Waste Management (RECOD '91), 1, A-1-8 Pages, 1991/04
None
*; Yasu, Takami; Shoji, Kenji; Fukushima, Isao; *; Shibuya, Jun; ; ; Yamamoto, Masao
PNC TN8440 87-190, 35 Pages, 1987/08
no abstracts in English
Ishiguro, Katsuhiko; Sasaki, Noriaki; Kawanishi, N.*; Nagaki, Hiroshi;
PNC TN841 82-54, 14 Pages, 1982/10
Growth behavior of surface layers on simulated waste glass during two different types of leaching has been studied associated with their corrosion kinetics. Static and Soxhlet leach tests were performed in distilled water at a temperature of 100 degrees celsius. Auger and ESCA analyses of solid samples after leaching showed that the layers consisted of two or three sublayers which were distinguished by their different components. The transition elements Fe and Ni, the rare - earths Nd and La,and Zn were concentrated in the layers, while Si, B and alkali were depleted in most of the layers. Growth kinetics of the layers followed approximately linear relations for the two types of leaching. Growth rates and elemental profiles of the layers depended upon the leaching conditions. Comparison between the leaching rate and the thickness of the layer showed that layers did not work as effective diffusion barriers untill the threshold thickness, which depended on the layer structures.
*; ; Nagaki, Hiroshi
PNC TN841 82-26, 12 Pages, 1982/04
R&D activities on the solidificationof HLLW and related technologies arebeing performed with the aim of designingand constructing the HLLWSolidification Pilot Plant at Tokai whichis planned to start operations in 1987. Solidified waste forms and compositionshave been studied with the aid of characte-rizing solidified products and evaluatingsolidification technologies, and twotypical series of borosilicate glass produ-cts have been found to be feasible for thesolidification of HLLW generated by theTokai Reprocessing Plant. The HLLW Engineering Test Facility (FTF) with denitration and concentrationequipment, two different types of Joule-heated ceramic melters, offgas treatmentequipment and a canister handling system,has been in opcration since February 1980in order to obtain various kinds of engin-eering data and perspectives. Air-coolinglests are also in progress to charaterizenatural or forced convection heat transferin the storage of the HLLW solidifiedwaste.
Yamamoto, Masao
Nihon Genshiryoku Gakkai-Shi, 19(12), P. 827, 1977/12
Segawa, Takeshi*; Hoshino, Tadaya*; *; *; ; *; *
PNC TN841 74-14, 48 Pages, 1974/06
no abstracts in English
Hoshino, Tadaya*; ; *; *; *; *; *; *
PNC TN841 73-17, 78 Pages, 1973/07
no abstracts in English
