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Amaya, Masaki
High Temperature Corrosion of Materials, 101(3), p.455 - 469, 2024/06
Times Cited Count:0 Percentile:0.00(Metallurgy & Metallurgical Engineering)Pham, V. H.; Kurata, Masaki; Steinbrueck, M.*
Thermo (Internet), 1(2), p.151 - 167, 2021/09
Pham, V. H.; Nagae, Yuji; Kurata, Masaki; Bottomley, D.; Furumoto, Kenichiro*
Journal of Nuclear Materials, 529, p.151939_1 - 151939_8, 2020/02
Times Cited Count:17 Percentile:87.32(Materials Science, Multidisciplinary)Pham, V. H.; Nagae, Yuji; Kurata, Masaki; Furumoto, Kenichiro*; Sato, Hisaki*; Ishibashi, Ryo*; Yamashita, Shinichiro
Proceedings of International Nuclear Fuel Cycle Conference / Light Water Reactor Fuel Performance Conference (Global/Top Fuel 2019) (USB Flash Drive), p.670 - 674, 2019/09
Negyesi, M.; Amaya, Masaki
Journal of Nuclear Science and Technology, 54(10), p.1143 - 1155, 2017/10
Times Cited Count:8 Percentile:57.82(Nuclear Science & Technology)Narukawa, Takafumi; Amaya, Masaki
Journal of Nuclear Science and Technology, 53(1), p.112 - 122, 2016/01
Times Cited Count:8 Percentile:57.10(Nuclear Science & Technology)Udagawa, Yutaka; Nagase, Fumihisa; Fuketa, Toyoshi
JAERI-Research 2005-020, 40 Pages, 2005/09
In order to investigate effects of quenching temperature and cooling rate before quench on cladding ductility reduction under LOCA conditions, samples cut from non-irradiated 1717-type Zircaloy-4 cladding tubes for PWRs were oxidized in steam at 1373 and 1473 K, cooled at 2 to 7 K/s, and quenched at 1073 to 1373 K. The quenched samples were subjected to ring compression test, microstructure observation, and Vickers hardness test. Quenching temperature decrease obviously increased area fraction of
phase in the radial cross section of the cladding, and reduced cladding ductility. Slow-cooling rate decrease increased unit size and hardness of precipitated
phase, while
phase area fraction and cladding ductility were not significantly changed.
phase is harder than the surrounding region in the metallic layer and has higher oxygen content, indicating its low ductility. Consequently, increase in the area fraction in the cladding is a main cause of the reduction in cladding ductility with decrease in the quenching temperature.
Nagase, Fumihisa; Otomo, Takashi; Uetsuka, Hiroshi
Journal of Nuclear Science and Technology, 40(4), p.213 - 219, 2003/04
Times Cited Count:75 Percentile:96.92(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.
Yoshikawa, Masahito; Oshima, Takeshi; Ito, Hisayoshi; Takahashi, Kunimasa*; Kitabatake, Makoto*
Materials Science Forum, 353-356, p.635 - 638, 2001/00
no abstracts in English
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Journal of Nuclear Science and Technology, 23(10), p.928 - 930, 1986/00
Times Cited Count:5 Percentile:65.49(Nuclear Science & Technology)no abstracts in English
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Journal of Nuclear Science and Technology, 20(11), p.941 - 950, 1983/00
Times Cited Count:36 Percentile:94.05(Nuclear Science & Technology)no abstracts in English
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JAERI-M 82-005, 14 Pages, 1982/03
no abstracts in English
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Journal of Nuclear Science and Technology, 19(2), p.158 - 165, 1982/00
Times Cited Count:24 Percentile:88.58(Nuclear Science & Technology)no abstracts in English
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JAERI-M 9681, 19 Pages, 1981/09
no abstracts in English
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JAERI-M 9475, 22 Pages, 1981/05
no abstracts in English
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JAERI-M 9445, 37 Pages, 1981/04
no abstracts in English
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Journal of Nuclear Science and Technology, 18(9), p.705 - 717, 1981/00
Times Cited Count:41 Percentile:95.91(Nuclear Science & Technology)no abstracts in English
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Journal of Nuclear Materials, 95(3), p.303 - 306, 1980/00
Times Cited Count:14 Percentile:94.05(Materials Science, Multidisciplinary)no abstracts in English
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Journal of Nuclear Science and Technology, 17(3), p.243 - 245, 1980/00
Times Cited Count:5 Percentile:69.63(Nuclear Science & Technology)no abstracts in English
Harayama, Yasuo;
Zairyo Kagaku, 16(4,5), p.173 - 179, 1979/00
no abstracts in English