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Sato, Rika; Kondo, Toshiki; Umeda, Ryota; Kikuchi, Shin; Yamano, Hidemasa
Progress in Nuclear Science and Technology (Internet), 8, p.137 - 142, 2025/09
In a sodium-cooled fast reactor (SFR) coupled to thermal energy storage (TES) system, the reaction between nitrate molten salt as thermal energy storage medium and sodium (Na) as reactor coolant might occur under postulated accidental conditions. Thus, the reaction behavior of Na-nitrate molten salt is one of the important phenomena in terms of safety assessment of the SFR with TES system. In this study, reaction experiments on Na-solar salt were performed. It was found that Na-solar salt reaction occurred after the NaNO
-KNO eutectic melting. Based on the measured reaction temperature, the kinetic parameters and rate constant were obtained and compared with the sodium-water reaction. From the results of kinetic analysis, it could be assumed that Na-solar salt reaction occurs in the time frame of the accident such as the failure of heat transfer tube of sodium-molten salt heat exchanger.
Nagase, Fumihisa; Fuketa, Toyoshi
Journal of Nuclear Science and Technology, 42(1), p.58 - 65, 2005/01
Times Cited Count：54 Percentile：94.39(Nuclear Science & Technology)Tube burst tests have been performed with artificially hydrided Zircaloy-4 specimens at room temperature and at 620 K. Pressurization rate was increased to a maximum of 3.4 GPa/s in order to simulate rapid PCMI that occurs in high burnup fuel rods during a pulse-irradiation in the NSRR. Hydrogen content in the specimens ranged from 150 to 1050 ppm. Hydrides were accumulated in the cladding periphery and formed "hydride rim" as observed in high burnup PWR fuel claddings. The hydrided cladding tubes failed with an axial crack at the room temperature tests. Brittle fracture appeared in the hydride rim, and failure morphology was similar to that observed in the NSRR experiments. The hydrides rim obviously reduced burst pressure and residual hoop strain at the tests. The residual hoop strain was very small even at 620 K when thickness of the hydride rim exceeded 18% of cladding thickness. The present result accordingly indicates an important role of the hydrides layer in high burnup fuel rod failure under RIA conditions.
Otomo, Takashi; Nagase, Fumihisa; Uetsuka, Hiroshi
JAERI-Tech 99-071, p.25 - 0, 1999/10
no abstracts in English
Nagase, Fumihisa; ; Uetsuka, Hiroshi
JAERI-Research 98-064, 25 Pages, 1998/11
JAERI-Research-98-064.pdf:2.17MB
no abstracts in English
Ishijima, Kiyomi; ; Fuketa, Toyoshi; Sasajima, Hideo
NEA/CSNI/R(95)22, 0, p.87 - 105, 1996/00
no abstracts in English
Fuketa, Toyoshi; Nagase, Fumihisa; Ishijima, Kiyomi;
Nucl. Saf., 37(4), p.328 - 342, 1996/00
no abstracts in English
Katanishi, Shoji; Ishijima, Kiyomi
Journal of Nuclear Science and Technology, 32(11), p.1098 - 1107, 1995/11
Times Cited Count：2 Percentile：27.51(Nuclear Science & Technology)no abstracts in English
Tanzawa, Sadamitsu
JAERI-M 93-011, 32 Pages, 1993/02
no abstracts in English
Yanagisawa, Kazuaki;
Proc. of 4th Asian Symp. on Research Reactors; ASRR-IV, p.58 - 69, 1993/00
no abstracts in English
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JAERI-M 92-072, 194 Pages, 1992/05
no abstracts in English
Tanzawa, Sadamitsu; ;
JAERI-M 91-215, 40 Pages, 1992/01
no abstracts in English
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JAERI-M 89-097, 155 Pages, 1989/08
no abstracts in English
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Journal of Nuclear Science and Technology, 23(12), p.1051 - 1063, 1986/12
Times Cited Count：0 Percentile：0.00(Nuclear Science & Technology)no abstracts in English
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JAERI-M 86-012, 179 Pages, 1986/02
no abstracts in English
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JAERI-M 84-168, 242 Pages, 1984/10
no abstracts in English
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JAERI-M 83-193, 112 Pages, 1983/11
no abstracts in English
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JAERI-M 82-012, 122 Pages, 1982/03
no abstracts in English
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JAERI-M 9755, 115 Pages, 1981/11
no abstracts in English
; ; ; ;
JAERI-M 9488, 151 Pages, 1981/05
no abstracts in English
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JAERI-M 9319, 85 Pages, 1981/02
no abstracts in English
