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temperature measurement for lamp-based heating deviceSumita, Takehiro; Sudo, Ayako; Takano, Masahide; Ikeda, Atsushi
Science and Technology of Advanced Materials; Methods (Internet), 2(1), p.50 - 54, 2022/02
Matsuzaki, Shota*; Hayashi, Hiroaki*; Nakajima, Kaoru*; Matsuda, Makoto; Sataka, Masao*; Tsujimoto, Masahiko*; Toulemonde, M.*; Kimura, Kenji*
Nuclear Instruments and Methods in Physics Research B, 406(Part B), p.456 - 459, 2017/09
Times Cited Count：5 Percentile：34.75(Instruments & Instrumentation)Hamamoto, Shimpei; Sawahata, Hiroaki; Suzuki, Hisashi; Ishii, Toshiaki; Yanagida, Yoshinori
JAEA-Technology 2017-012, 20 Pages, 2017/06
JAEA-Technology-2017-012.pdf:7.9MB
A melt wire was installed at the tip of the control rod in order to measure the temperature of High Temperature engineering Test Reactor (HTTR). After experience with reactor scram from the state of reactor power 100%, the melt wire was taken out from the control rod and appearance has been observed visually. In this study, an exclusive device for taking out the melt wire was prepared. The take-out device functions as expected, and the melt wire was safely and reliably taken out using a remote manipulator. And because the visual observation of the melt wire was clearly carried out, we were successful in developing the control rod temperature measurement technology. It was confirmed that the melt wires with a melting point of 505
C or less were melted, and the melt wires with a melting point of 651C or more were not melted. Therefore, it was found that the highest arrival temperature of tip of the control rods where the melt wires are installed reaches within the range of 505 to 651C. And it was found that the control rod temperature at the time of reactor scram does not exceed the using temperature criteria (900C) of Alloy 800H of the control rod sleeve.
Kikuchi, Masahiro; Ukai, Mitsuko*; Kobayashi, Yasuhiko
JAEA-Review 2014-050, JAEA Takasaki Annual Report 2013, P. 89, 2015/03
Si investigated by ac calorimetryTateiwa, Naoyuki; Haga, Yoshinori; Matsuda, Tatsuma; Ikeda, Shugo; Yasuda, Takashi*; Takeuchi, Tetsuya*; Settai, Rikio*; Onuki, Yoshichika
Journal of the Physical Society of Japan, 74(7), p.1903 - 1906, 2005/07
Times Cited Count：73 Percentile：89.15(Physics, Multidisciplinary)The pressure dependences of the antiferromagnetic and superconducting transition temperatures have been investigated by ac heat capacity measurement under high pressures for the heavy-fermion superconductor CePt
Si without inversion symmetry in the tetragonal structure. The N
el temperature 
= 2.2 K decreases with increasing pressure and becomes zero at the critical pressure 
0.6 GPa. On the other hand, the superconducting phase exists in a wider pressure region from ambient pressure to about 1.5 GPa. The pressure phase diagram of CePtSi is thus very unique and has never been reported before for other heavy fermion superconductors.
Kosako, Toshiso*; Sugiura, Nobuyuki*; Kudo, Kazuhiko*; Mori, Chizuo*; Iimoto, Takeshi*; Shikama, Tatsuo*; Katagiri, Masaki; Hayashi, Kimio; Aihara, Jun; Shibata, Taiju; et al.
JAERI-Review 2000-017, 78 Pages, 2000/10
JAERI-Review-2000-017.pdf:4.62MB
no abstracts in English
Araki, Masanori;
Review of Scientific Instruments, 67(1), p.178 - 184, 1996/01
Times Cited Count：4 Percentile：43.25(Instruments & Instrumentation)no abstracts in English
Kojima, Takuji; Morishita, Norio; Ito, Hisayoshi; S.Biramontri*
Applied Radiation and Isotopes, 47(4), p.457 - 459, 1996/00
Times Cited Count：4 Percentile：39.16(Chemistry, Inorganic & Nuclear)no abstracts in English
Kubo, Shinji; Akino, Norio; Akiyama, Mitsunobu*;
Dai-31-Kai Nihon Dennetsu Shimpojiumu Koen Rombunshu, 0, p.373 - 375, 1994/05
no abstracts in English
;
Journal of Nuclear Materials, 133-134, p.800 - 804, 1985/00
Times Cited Count：0 Percentile：0.00(Materials Science, Multidisciplinary)no abstracts in English
;
Journal of Nuclear Science and Technology, 21(7), p.515 - 527, 1984/00
Times Cited Count：10 Percentile：70.29(Nuclear Science & Technology)no abstracts in English
;
Teion Kogaku, 19(6), p.385 - 393, 1984/00
no abstracts in English
;
JAERI-M 82-055, 51 Pages, 1982/06
no abstracts in English
;
JAERI-M 9407, 22 Pages, 1981/03
no abstracts in English
JAERI-M 6985, 36 Pages, 1977/03
no abstracts in English
Hanawa, Satoshi; Hata, Kuniki; Uchida, Shunsuke; Nishiyama, Yutaka
no journal, ,
Water in the primary circuit of Nuclear Power Plants (NPPs) decomposes by radiolysis, then oxidants such as hydrogen peroxide and oxygen are generated as a result. Hydrogen peroxide is one of the major factor for initiation and propagation of stress corrosion cracking (SCC) in structural materials, hence in-situ monitoring of hydrogen peroxide at the point of interest in irradiation field is quite important to assure the integrity of NPPs. Concentration of hydrogen peroxide in irradiation field is governed by energy deposition by neutron and 
-ray in which the degree of energy is different in locations, while concentration in un-irradiation area decreases due to thermal decomposition. Quantitative evaluation of hydrogen peroxide is, however, available only by analyzing sampled water at present, and therefore in-situ monitoring of hydrogen peroxide at the point of interest becomes quite important. Frequency dependent complex impedance (FDCI) analysis gives characteristics of oxide film on the materials, and it becames clear by recent activities that the low frequency semicircles in Cole-Cole plots shows linear correlation to the concentration of hydrogen peroxide. JAEA is now developing a sensor for in-situ monitoring of hydrogen peroxide applicable to irradiation environment by applying FDCI. The outline and overall schedule of the sensor development will be reported in the presentation.
Kondo, Yuki; Takaya, Shigeru; Yada, Hiroki; Hashidate, Ryuta
no journal, ,
In sodium-cooled fast reactors, a large number of temperature sensors are used for temperature monitoring and heater control of sodium-containing equipment. In the conventional insulation resistance measurement method for temperature sensors, preparation work such as stopping the temperature measurement function and separating from the electric board is required, and the workload also increases with increasing the number of target equipment, which has become a problem from the viewpoint of inspection period. In this study, we have developed a new temperature sensor of which insulation resistance is measurable online, and evaluated the performance by experiments.
Kai, Tetsuya; Matsumoto, Yoshihiro*; Parker, J. D.*; Segawa, Mariko; Shinohara, Takenao; Hiroi, Kosuke; Su, Y. H.; Zhang, S.*; Hayashida, Hirotoshi*; Oikawa, Kenichi; et al.
no journal, ,
Yogo, Akifumi*; Lan, Z.*; Arikawa, Yasunobu*; Hayakawa, Takehito*; Mirfayzi, S. R.*; Wei, T.*; Tatsumi, Yuta*; Sato, Hirotaka*; Kamiyama, Takashi*; Koizumi, Mitsuo
no journal, ,
no abstracts in English
