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Ohdaira, Naoya*; Saito, Shigeru
Heliyon (Internet), 6(2), p.e03429_1 - e03429_8, 2020/02
Times Cited Count：4 Percentile：39.81(Multidisciplinary Sciences)Lead-bismuth eutectic (LBE) is a candidate liquid metal coolant for a fast reactor, especially accelerator driven system (ADS). Freeze sealed valve is a candidate design to be possible to add passive safety to the reactor. On the other hand, since LBE is known that it causes expansion after its solidification, quantitative evaluation of the stress to the pipe produced by the LBE expansion should be considered. Many researchers produced related data for the expansion, however, evaluations of the strain by LBE expansion was barely reported. Therefore, the strain measurement using a stainless steel cup and the stress evaluation was performed together with visual observation using an optical microscopy. The results indicated keeping above room temperature (RT) was a significantly effective way to reduce the strain to the pipe.
SbTe
Shamoto, Shinichi; Yamada, Noboru*; Matsunaga, Toshiyuki*; Proffen, T.*; Richardson, J. W.*; Chung, J.-H.*; Egami, Takeshi*
Applied Physics Letters, 86(8), p.081904_1 - 081904_3, 2005/02
Times Cited Count：48 Percentile：81.94(Physics, Applied)Local structure of NaCl-type crystalline GeSbTe has been studied by the atomic pair distribution function analysis of pulsed neutron powder diffraction data. We have found the large displacement of germanium atoms in this crystalline phase. Usually, such a large lattice distortion has disadvantage for the electric conductivity. The electronic band structure, however, implies that this significant distortion in addition to the lattice defect at Na site reduces only thermal conductivity, while the highly ordered tellurium atoms at Cl site keep high electric conductivity.
Igarashi, Shinichi*; Haraguchi, Masaharu*; Aihara, Jun; Saito, Takeru*; Yamaguchi, Kenji; Yamamoto, Hiroyuki; Hojo, Kiichi
Journal of Electron Microscopy, 53(3), p.223 - 228, 2004/08
Times Cited Count：4 Percentile：24.19(Microscopy)no abstracts in English
Shiina, Yasuaki; Inagaki, Terumi*
Nihon Kikai Gakkai Rombunshu, B, 69(681), p.1233 - 1241, 2003/05
In order to reduce phase change time in latent heat technology, improvement of effective thermal conductivity of heat storage unit would be one of the techniques. Effect of effective thermal conductivity on melting time are studied analytically of circular composite heat storage capsules made by immersing phase change materials (PCM) into porous metals. Numerical and approximate analysis were made with the consideration of uniform and non-uniform heat transfer coefficients around the cylindrical surface. Four PCMs (H
O,Octadecane, LiCO
, NaCl) and three metals (copper, aluminum and carbon steel) were selected specific materials. Porosity of the metals were restricted larger than 0.9 in order to lessen decrease in latent heat. Results show that reduction in melting time was obtained for the above PCMs, especially for low conductivity PCMs. Melting time obtained by approximate analysis agrees well with numerical analysis. High Nusselt number and high thermal conductivity of heat transfer fluid would be more effective to reduce phase change time.
Takase, Kazuyuki; Ose, Yasuo*; Kunugi, Tomoaki*
Fusion Engineering and Design, 63-64, p.421 - 428, 2002/12
Times Cited Count：20 Percentile：76.08(Nuclear Science & Technology)no abstracts in English
Takase, Kazuyuki; Ose, Yasuo*; Yoshida, Hiroyuki; Kunugi, Tomoaki*
Dai-39-Kai Nihon Dennetsu Shimpojiumu Koen Rombunshu (CD-ROM), 2 Pages, 2002/06
no abstracts in English
Ose, Yasuo*; Suzuki, Takayuki*; Yoshida, Hiroyuki; Takase, Kazuyuki; Kunugi, Tomoaki*
Nihon Kikai Gakkai Yamanashi Koenkai Koen Rombunshu (020-4), p.51 - 52, 2002/00
no abstracts in English
Shiina, Yasuaki; Komaki, Katsuya*; Tanaka, Gaku*; Hishida, Makoto*
JAERI-Tech 2001-076, 49 Pages, 2001/11
no abstracts in English
Takase, Kazuyuki; Ose, Yasuo*; Akimoto, Hajime
Fusion Technology, 39(2-Part.2), p.1050 - 1055, 2001/03
no abstracts in English
*; Takahashi, Nao*
JNC TJ7440 2000-014, 40 Pages, 2000/02
JNC-TJ7440-2000-014.pdf:17.73MB
no abstracts in English
Kubo, Shinji; Akino, Norio
Transactions of the American Nuclear Society, 81, p.352 - 353, 1999/11
no abstracts in English
; Shiina, Yasuaki; Inagaki, Terumi*
Kashika Joho Gakkai-Shi, 19(75), p.41 - 45, 1999/10
no abstracts in English
CO, MgCl and CaCl as heat storage mediumShiina, Yasuaki
JAERI-Tech 98-056, 64 Pages, 1998/12
no abstracts in English
Brear, D. J.
PNC TN9410 98-005, 53 Pages, 1998/01
When liquid fuel makes contact with steel structure the liquid can freeze as a crust and the structure can melt at the surface. The melting and freezing processes that occur can influence the mode of fuel freezing and hence fuel relocation. Furthermore the temperature gradients established in the fuel and steel phases determine the rate at which heat is transferred from fuel to steel. In this memo the 1-D transient heat conduction equations are applied to the case of initially liquid UO brought into contact with solid steel using up-to-date materials properties. The solutions predict criteria for fuel crust formation and steel melting and provide a simple algorithm to determine the interface temperature when one or both of the materials is undergoing phase change. The predicted steel melting criterion is compared with available experimental results.
; *; *
Molecular and Microscale Heat Transfer in Materials Processing and Other Applications, 1, p.105 - 116, 1996/12
no abstracts in English
Akino, Norio; Takase, Kazuyuki; Kubo, Shinji; *; *; *
Dai-31-Kai Nihon Dennetsu Shimpojiumu Koen Rombunshu, 0, p.589 - 591, 1994/00
no abstracts in English
Hayashi, Takumi; Okuno, Kenji; Yamanaka, Keiichi*; Naruse, Yuji
Journal of Alloys and Compounds, 189(2), p.195 - 199, 1992/12
Times Cited Count：8 Percentile：60.33(Chemistry, Physical)no abstracts in English
Hayashi, Takumi; Okuno, Kenji; Naruse, Yuji
Journal of Nuclear Materials, 191-194, p.1065 - 1069, 1992/00
Times Cited Count：0 Percentile：0.01(Materials Science, Multidisciplinary)no abstracts in English
; *; Kozawa, Yoshiyuki*; *
Bull.JSME, 29(253), p.2122 - 2130, 1986/00
no abstracts in English
pellets under compression stressKurasawa, T.
Journal of Nuclear Materials, 71(2), p.327 - 332, 1978/02
Times Cited Count：2no abstracts in English
