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Hirooka, Shun; Kato, Masato
Journal of Nuclear Science and Technology, 55(3), p.356 - 362, 2018/03
Times Cited Count：8 Percentile：62.29(Nuclear Science & Technology)The sound speeds of longitudinal and transverse waves in the uranium-plutonium mixed oxide (MOX) pellets were measured as functions of porosity, oxygen-to-metal ratio (O/M) and plutonium content. The effect of each parameter was well fitted by a linear function and the equations were obtained to calculate the sound speeds. Mechanical properties were evaluated with the sound speeds and the result of Young's modulus showed that porosity was the most important factor to decrease Young's modulus. Temperature dependence on Young's modulus was also evaluated with previously reported thermal expansion. Decrease of Young's modules with increasing temperature was in good agreement with available literature.
Nagase, Fumihisa; Otomo, Takashi; Uetsuka, Hiroshi
Journal of Nuclear Science and Technology, 40(4), p.213 - 219, 2003/04
Times Cited Count：69 Percentile：96.6(Nuclear Science & Technology)Isothermal oxidation tests in flowing steam were performed on low-Sn Zircaloy-4 cladding tubes over the wide temperature range from 773 to 1573 K in order to obtain oxidation kinetics applicable to various loss-of-coolant accident conditions of LWRs. The oxidation generally obeys a parabolic rate law for the examined time range up to 3600s at temperatures from 1273 K to 1573K, and for a limited time range up to 900s from 773 to 1253 K. A cubic rate law is preferable for evaluating the longer-term oxidation at 1253 K and below. The parabolic rate law constant and the cubic rate law constant for measured weight gain were evaluated at every examined temperature, and Arrhenius-type equations were determined in order to describe the temperature dependence of the rate constants. It was indicated that the change of the oxidation kinetics from the cubic to the parabolic rate and the discontinuities in the temperature dependence of the rate constants are caused by the monoclinic/tetragonal phase transformation of ZrO
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Nihira, Takeshi*; Iwata, Tadao*; Iwase, Akihiro
JAERI-Research 2001-045, 33 Pages, 2001/11
JAERI-Research-2001-045.pdf:1.27MB
no abstracts in English
Serizawa, Hiroyuki; Arai, Yasuo
Journal of Alloys and Compounds, 312(1-2), p.257 - 264, 2001/00
Times Cited Count：11 Percentile：57.7(Chemistry, Physical)no abstracts in English
Serizawa, Hiroyuki; Arai, Yasuo; Takano, Masahide; Suzuki, Yasufumi
Journal of Alloys and Compounds, 282, p.17 - 22, 1999/00
Times Cited Count：20 Percentile：74.38(Chemistry, Physical)no abstracts in English
; G.R.Sunaryo*; Ishigure, Kenkichi *
Journal of Physical Chemistry, 98(19), p.5164 - 5173, 1994/00
Times Cited Count：78 Percentile：91.42(Chemistry, Physical)no abstracts in English
; Endo, Yasuichi; Hoshiya, Taiji; Niimi, Motoji;
JAERI-M 90-214, 57 Pages, 1990/11
no abstracts in English
Matsuura, Shojiro
JAERI-M 83-129, 246 Pages, 1983/09
no abstracts in English
JAERI-M 82-114, 197 Pages, 1982/09
no abstracts in English
JAERI-M 9152, 35 Pages, 1980/11
no abstracts in English
; ;
JAERI-M 8187, 21 Pages, 1979/03
no abstracts in English
