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Abe, Toru*; Hirano, Fumio; Mihara, Morihiro; Honda, Akira
Genshiryoku Bakkuendo Kenkyu (CD-ROM), 27(1), p.3 - 11, 2020/06
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.
Sharpe, J. P.*; Humrickhouse, P. W.*; Skinner, C. H.*; NSTX Team; Tanabe, Tetsuo*; Masaki, Kei; Miya, Naoyuki; JT-60 Team; Sagara, Akio*
Journal of Nuclear Materials, 337-339, p.1000 - 1004, 2005/03
Times Cited Count：42 Percentile：92.28(Materials Science, Multidisciplinary)no abstracts in English
Tomita, Yukihiro*; Smirnov, R.*; Chutov, Y.*; Takayama, Arimichi*; Takizuka, Tomonori
Purazuma, Kaku Yugo Gakkai-Shi, 6, p.429 - 432, 2004/00
Formation of an electrostatic potential due to negatively charged dust particles near a target plate was studied by one-dimensional kinetic analysis. Immovable dust particles are distributed uniformly inside a system. It is clarified that the negatively charged dust particles reduce the ion-sheath drop. A threshold dust density makes the electric field at the target plate zero. The stationary oscillation appears in the electrostatic potential for the dust density above the threshold. We confirm that this oscillation is the Dust Ion-Acoustic Wave with a wave length of the order of Debye length, where dust charges are effective to determine the coefficient.
Smirnov, R.*; Tomita, Yukihiro*; Takizuka, Tomonori; Takayama, Arimichi*; Chutov, Y.*
Purazuma, Kaku Yugo Gakkai-Shi, 6, p.752 - 755, 2004/00
Dynamics of a single dust particle in near-wall plasma is studied in wide range of dust radii and masses. Dust motion and charging equations are solved in the plasma simulated for sheath and ionizing presheath using one-dimensional particle model. It was found that balance of electric and ion drag forces acting on the dust particle provides two critical dust radii differentiating motion of dust started at the wall between pinned against the wall, short and long-range oscillating. Delayed charging causes the mass dependence of the second critical radius until transition from short to long-range oscillations becomes undistinguishable.
Takase, Kazuyuki
Fusion Engineering and Design, 63-64, p.205 - 210, 2002/12
Times Cited Count：2 Percentile：17.03(Nuclear Science & Technology)no abstracts in English
Takase, Kazuyuki
Proceedings of the 1st International Symposium on Advanced Fluid Information (AFI-2001), p.370 - 375, 2001/10
no abstracts in English
Ito, Yasuhisa; Noda, Kimio; ;
JNC TN8410 2001-018, 67 Pages, 2001/04
JNC-TN8410-2001-018.pdf:2.96MB
There are waste storage pits where non-radioactive wastes generated from plutonium fuel facilities were stored in JNC Tokai Works. But radioactive wastes were found in one of the pit during wastes arrangement works. Therefore we set the pit temporary controlled area and recovered wastes from it. This report describes the radiation control technique of recovery work in detail.
Takase, Kazuyuki
Fusion Engineering and Design, 54(3-4), p.605 - 615, 2001/04
Times Cited Count：12 Percentile：64.73(Nuclear Science & Technology)no abstracts in English
Nakazawa, Takashi; Kikuchi, Hisaki; Yasu, Katsuji; Yoshino, Toshiaki; Ashikagaya, Yoshinobu; Sato, Koichi; Minowa, Yuji; Nomura, Toshibumi
JAERI-Tech 2001-010, 125 Pages, 2001/03
no abstracts in English
Takase, Kazuyuki
Fusion Technology, 39(2-Part.2), p.1043 - 1049, 2001/03
no abstracts in English
Takase, Kazuyuki
Fusion Engineering and Design, 51-52(Part.B), p.631 - 639, 2000/11
Times Cited Count：0 Percentile：0.01(Nuclear Science & Technology)no abstracts in English
Endo, Hideo; Seki, Masayuki; ; *; *
JNC TN8410 2000-007, 89 Pages, 2000/03
JNC-TN8410-2000-007.pdf:6.28MB
(1)Outline of examination. Various test specimens were made to evaluate and confirm the weld strength properties of the oxide dispersion strengthened (ODS) cladding tube material (martensitic and ferritic steel), which had been manufactured in JFY 1997. The examination consisted of tensile tests (RT,650
C, 700C, 800C), internal pressure creep tests, internal pressure burst tests, and a rapid heating burst tests. (2)Examination results. The results of the tensile tests are as follows: (ferritic and martensitic) (a)All test specimens from RT to 700C failed in the tube. The weld zones had not failed. (b)The test specimens at 800C failed in the weld zones. There was little elongation. (ferritic) (a)The weld zone had fine grain structure and carbide precipitates. (martensitic) (a)Carbide had precipitated in the weld zone. From these results, the strength of weld zone decreased extremely at temperatures exceeding the endurance limit (700C) All of the internal pressure burst test specimens and the rapid heating burst test specimens failed in the tube and not the weld zone. (3)The quality assurance method of the test specimens. The weld reliability of the test specimens were confirmed by the process control of the welding conditions, by using control test specimens, and ultrasonic testing. Confirmation of the process control of the welding conditions; current wave, the voltage waveform, the accelerogram, and the displacement ripple in the welding process was recorded to assure an abnormal value had not occurred. (Process control of welding condition) The results the current waveform, voltage waveform, accelerogram, and the displacement waveform were excellent. (test specimens) The weld joint was excellent based on metallography examination. (Ultrasonic testing) The length of the weld joint was measured and found to be adequate. The reliability the weld joint can be assured by using the above-mentioned method.
Takase, Kazuyuki
Nihon Kikai Gakkai 2000-Nendo Nenji Taikai Koen Rombunshu, 1, p.607 - 608, 2000/00
no abstracts in English
Takase, Kazuyuki; Ose, Yasuo*; Akimoto, Hajime
Nihon Kikai Gakkai Kansai Shibu Dai-75-ki Teiji Soukai Koenkai Koen Rombunshu, p.13_11 - 13_12, 2000/00
no abstracts in English
Takase, Kazuyuki; Kunugi, Tomoaki*
Proc. of 5th ASME/JSME Joint Thermal Engineering Conf. (CD-ROM), 8 Pages, 1999/00
no abstracts in English
Takase, Kazuyuki; Kunugi, Tomoaki*
Fusion Technology, 34(3), p.645 - 650, 1998/11
no abstracts in English
Takase, Kazuyuki; ; Kunugi, Tomoaki*
Kashika Joho Gakkai-Shi, 18(1), p.27 - 28, 1998/07
no abstracts in English
Takase, Kazuyuki;
Kashika Joho Gakkai Zenkoku Koenkai (CD-ROM), 11 Pages, 1998/00
no abstracts in English
; *; *; ;
JAERI-M 9457, 41 Pages, 1981/04
no abstracts in English
