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Koseki, Shoichiro*; Watanabe, Yasuhiro; Zhang, F.; Tani, Norio
Heisei-14-Nen Denki Gakkai Zenkoku Taikai Koen Rombunshu, p.6 - 7, 2002/00
High Intensity Proton Accelerator Facility is under design. 3 GeV proton synchrotron is one of its facility. It has about ten families of magnets. Resonant type power supplies are adopted to excite their magnet families at 25 Hz. Magnetic field of each magnet family has to track each other at high precision of 1E-4. In this paper current control of power supply is studied. Phase angle of current is affected by variations of capacitance of resonant capacitors caused by temperature. A correction of current reference is necessary realize the performance.
Kojima, Takuji
Hoshasen Kagaku, 2001(72), p.37 - 40, 2001/08
no abstracts in English
Wada, Hiroaki
JNC TN8400 2000-015, 37 Pages, 2000/03
This report describes the study done within the period of time when I was postdoctoral research worker at Japan Nuclear Cycle Development Institute. The report includes two parts as follows. (1) Exact Solution of Electric Transitions for High Energy photons. Technologies for creating high-energy 
beams have been rapidly developed. These advancements make the research using high-energy -rays more important. The electric transition rates for high-energy -rays were formulated. The electric multipole fields were treated strictly in the process of calculating the electric transition rates and the nuclear states were taken as the harmonic oscillator wave functions. (2) Production of the isomeric state of 
Cs in the thermal neutron capture reaction 
Cs(n, )Cs. In order to obtain precise data of the neutron capture cross section of the reaction Cs(n, )Cs, the production probability of isomer state 
Cs was measured in this work. The 1436 keV -ray emitted from both of 
Cs and Cs was measured. A production ratio of Cs to (Cs and Cs) was deduced from time dependence of peak counts of 1436keV -ray. The probability of the production of CS was obtained as 0.75
0.18 and this value revised the effective cross section upwards 92%. The effective cross section 
and the thermal neutron capture cross section 
were obtained as =0.290.02 b and =0.270.03 b with taking into account the production of 
Cs.
Sakurai, Kiyoshi; Ueki, Kotaro*; Naito, Yoshitaka*
Nihon Genshiryoku Gakkai-Shi, 42(2), p.114 - 115, 2000/02
no abstracts in English
JNC TN9400 99-009, 39 Pages, 1998/12
In this paper, an approach to the reconstruction of an idealized natural crack of non-vanishing conductivity is proposed with use of signals of eddy current testing. Two numerical models are introduced at first for modeling a Stress Corrosion Crack (SCC) in order it possibly to be represented by a set of crack parameters. A method for rapid prediction of the eddy current testing signals arisen from these idealized cracks is given then by extending a knowledge based fast forward solver developed by authors to the case of a non-vanishing conductivity. On the other hand, the inverse algorithm of conjugate gradient method is improved to reconstruct the crack parameters and is implemented with the pick-up signals and gradients calculated by using the rapid forward solver. Several examples are presented finally for validating the proposed strategy. The results verified that both of the models can give reasonable reconstruction results in case of a low noise level. The model concerning the touch of crack surfaces with a conducting band region surrounded by the crack edge, however, is proved more efficient than the model using a conductivity distribution from the point of view of both reconstruction speed and accuracy.
Kurihara, Kenichi; Kawamata, Yoichi
Fusion Technology 1996, 1, p.795 - 798, 1997/00
no abstracts in English
Nakakawa, Masayuki;
Joho Shori, 36(2), p.137 - 142, 1995/02
no abstracts in English
*; Okamoto, Koji*; *; Fumizawa, Motoo
Kashika Joho Gakkai-Shi, 14(SUPPL.1), p.39 - 42, 1994/07
no abstracts in English
Nagaoka, Toshi; Moriuchi, Shigeru
Hoken Butsuri, 29, p.315 - 320, 1994/00
no abstracts in English
Haruyama, Yasuyuki; Kojima, Takuji; Tachibana, Hiroyuki; Agematsu, Takashi; Okamoto, Jiro; *
Radioisotopes, 42(8), p.445 - 451, 1993/08
no abstracts in English
Nagaoka, Toshi; Saito, Kimiaki; Moriuchi, Shigeru
JAERI-M 91-067, 25 Pages, 1991/05
no abstracts in English
; Research Committee on Reactor Physics
JAERI-M 91-015, 188 Pages, 1991/02
no abstracts in English
Nakao, Taro; Terada, Kazushi; Kimura, Atsushi; Nakamura, Shoji; Iwamoto, Osamu; Harada, Hideo; Igashira, Masayuki*; Katabuchi, Tatsuya*; Hori, Junichi*
no journal, ,
In the reaction cross section measurements using accelerator facilities, the total amount of the target particles is important. In case of the radioactive samples, however, the absolute amount is not always determined accurately. In addition, as the radioactive samples are required to be sealed properly for the safety reason, the non-destructive quantitative method is required. This presentation will report about the developments of the calorimetoric method for determination of amount of radioactive samples. Present study includes the result of "Research and Development for accuracy improvement of neutron nuclear data on minor actinides" entrusted to the Japan Atomic Energy Agency by the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT).
Harada, Hideo; Iwamoto, Osamu; Iwamoto, Nobuyuki; Kimura, Atsushi; Terada, Kazushi; Nakao, Taro; Nakamura, Shoji; Mizuyama, Kazuhito; Igashira, Masayuki*; Katabuchi, Tatsuya*; et al.
no journal, ,
To improve accuracy of neutron nuclear data on minor actinides, a Japanese nuclear data project entitled as "Research and development for Accuracy Improvement of neutron nuclear data on Minor ACtinides (AIMAC)" has been performed by integrating all of the forefront knowledge and techniques in four different fields, such as, differential nuclear data measurement, integral nuclear data measurement, nuclear chemistry, and nuclear data evaluation. Highlights of the AIMAC project and their impacts are outlined.
Hatori, Masakazu; Ichikawa, Shoichi; Chiba, Yusuke; Kobayashi, Takanori; Uekura, Ryoichi; Hashiri, Nobuo*; Inuzuka, Taisuke*; Kitano, Hiroshi*; Abe, Hisashi*; Ono, Fumiyasu
no journal, ,
In order to reduce the influence on a plant schedule of Monju by the maintenance of dew point hygrometers, JAEA Agency examined a capacitance type dew point hygrometer as an alternative dew point hygrometer for a lithium-chloride type dew point hygrometer which had been used at the containment vessel leak rate test in Monju. As a result of comparing a capacitance type dew point hygrometer with a lithium-chloride type dew point hygrometer at the CV-LRT (Atmosphere: nitrogen, testing time/24 hours), there was no significant difference between a capacitance type dew point hygrometer and a lithium-chloride type dew point hygrometer. As a result of comparing a capacitance dew point hygrometer with a high-precision-mirror-surface type dew point hygrometer for long term verification (Atmosphere: air, testing time: 24 months), it was confirmed that a capacitance type dew point hygrometer satisfied the instrument specification required by the CV-LRT. There are no other cases where atmosphere measurement has been carried out for a long time by existing measuring instruments.
Ishiyama, Koji*; Yoshino, Osamu*; Hikima, Ryoichi*; Matsui, Hiroya; Ozaki, Yusuke; Takeuchi, Ryuji; Sakakibara, Junichi*; Sanoki, Satoru*; Hayashi, Kunihiko*
no journal, ,
In this study, we evaluate the high accurate elastic wave measurement system at the 500m stage in Mizunami underground research laboratory. We used the sine and pseudo random wave between 0.5 kHz and 20 kHz as source signals and received them by 6 receivers. We observed that the elastic wave became low speed and high attenuation around the zone where the rock classification was lower than surroundings. From this result, we could capture the damaged zone by elastic wave. For the capability of deeper exploration, we need to improve the transmission system.
