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Shu, Wataru; Matsuyama, Masao*; Suzuki, Takumi; Nishi, Masataka
Fusion Engineering and Design, 81(1-7), p.803 - 808, 2006/02
Times Cited Count:12 Percentile:63(Nuclear Science & Technology)In this work, the counting rate of bremsstrahlung X-rays was measured against the tritium partial pressure in two mixed gases diluted with helium or hydrogen. Subsequently, the counting rate was also measured against total pressure for T-He mixture at a constant tritium partial pressure of 93 Pa or 1.3 kPa. For both mixtures, the counting rate of bremsstrahlung X-rays decreased linearly with the decreasing tritium partial pressure when the total pressure is smaller than about 10 kPa. At higher pressures, the deviation from the linear relationship appeared due to absorption of beta-particles in the gas phase, and this can be decreased by some commercially available arrangements. On the other hand, the counting rate of bremsstrahlung X-rays depended only upon the tritium partial pressure when absorption of beta-particles in the gas phase is negligibly small. The results obtained show that this method of tritium monitoring is very promising for the fuel processing system of fusion reactors, especially for tritium recovery system of breeding blankets.
Iwase, Masanori*
JNC TJ8400 2000-063, 78 Pages, 2000/03
This study is aimed at controlling oxidation reaction of molten metal by ash in incineration systems, and at positively utilizing the oxidation reaction for decontamination of slag. In this year, in order to investigate physico-chemical properties of mixed fused salt containing alkali sulfates, with special focus on the behaviour of oxygen anion in the melts, Cu / Cu redox equilibrium experiments were carried out. Among the effect of various parameters on Cu / Cu ratio in binary and ternary alkali sulfate melts, the effect of partial pressures of oxygen and SO was mainly investigated in the study. Variation in Cu / Cu ratio were presented as the function of partial pressures of oxygen and SO, respectively. Possible thermodynamic interpretation were made on the experimental results. In addition, the dissolution of CrO in mixed alkali sulfates were also investigated as a first step to elucidate the mechanism of hot corrosion. With this investigation, an important finding was obtained that the solubility of CrO for melts with same average ionic radius, in other words, oxygen ion activity, were essentially identical under constant temperature and atmosphere.
Nakamura, Jinichi; ; Kawasaki, Satoru
Journal of Nuclear Science and Technology, 30(2), p.181 - 184, 1993/02
Times Cited Count:7 Percentile:68.63(Nuclear Science & Technology)no abstracts in English
G.Meinrath*; Takeishi, Hideyo
Journal of Alloys and Compounds, 194, p.93 - 99, 1993/00
Times Cited Count:23 Percentile:82.75(Chemistry, Physical)no abstracts in English
Nakamura, Jinichi; ; ; Kawasaki, Satoru
Journal of Nuclear Materials, 200, p.256 - 264, 1993/00
Times Cited Count:14 Percentile:78.06(Materials Science, Multidisciplinary)no abstracts in English
Ogiwara, Norio; *
Shinku, 36(3), p.325 - 327, 1993/00
no abstracts in English
Ugajin, Mitsuhiro
JAERI-M 92-065, 113 Pages, 1992/05
no abstracts in English
; Ogawa, Yutaka; Nakajima, Hajime
Tetsu To Hagane, 74(2), p.380 - 387, 1988/02
no abstracts in English
;
Journal of Nuclear Materials, 144(3), p.244 - 251, 1987/03
Times Cited Count:8 Percentile:63.44(Materials Science, Multidisciplinary)no abstracts in English
; ; ; ; ;
Japanese Journal of Applied Physics, 25(7), p.L604 - L606, 1986/00
Times Cited Count:1 Percentile:8.61(Physics, Applied)no abstracts in English
; Ikawa, Katsuichi
Journal of Nuclear Materials, 99(1), p.85 - 93, 1981/00
Times Cited Count:22 Percentile:90.03(Materials Science, Multidisciplinary)no abstracts in English