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Maruyama, Akira; Nomura, Shigeo; Kawai, Masashi; Takani, Satoru; Ota, Yoshio; Atsumo, Hideo
Nihon Genshiryoku Gakkai-Shi, 26(4), p.327 - 338, 1984/04
Times Cited Count：5 Percentile：51.32(Nuclear Science & Technology)None
Takeda, Kunio*; Ito, Kazumoto*; Mizutani, Tomonori*; Wada, Juichi*; Takani, Satoru*; Atsumo, Hideo*
PNC TN951 76-04, 64 Pages, 1976/03
The solubility of oxygen in liquid sodium was determined by vacuum distillation. Oxygen concentration was controlled by a cold trap in a dynamic sodium loop, and sodium was sampled from an expansion tank by dipping cup method and analysed by on line vacuum distillation method. A least-squares fit of the 37 experimental data over the range from 150 to 250
C of cold trap temperature yielded a correlating equation of log S = 6.118-(2383/T) where S= wt ppm of oxygen in sodium assumed to be Na
O. T = absolute temperature (K) The heat of solution 
H of NaO in liquid sodium was calculated from this equation to be 10902 cal/mole. The reproducibility of results was obtained at equilibrium temperature of 150, 200, and 250C with a standard deviation of 1.2, 1.8, and 4.1 ppm, respectively. The oxygen analysis results with cold trapping sodium from various sodium test loops in Oarai Engineering Center almost correspond with the solubility curve of this work.
M.Tokit*; Takani, Satoru*; Atsumo, Hideo*
PNC TN951 74-05, 47 Pages, 1974/05
A mass-spectrographic method was studied for determination of isotope ratio of trace amounts of rare gases in argon gas, and the operating condition of mass spectrometer such as ionic potential, total emission current, mass resolution factor, pressure of sample gas were decided. Trace amounts of 0.08ppm of Ne, Kr, and Xe in argon gas are detectable by this method. Coefficient variation of the determination of isotope ratio is 8% at 0.08ppm level, 6% at 1ppm level and 3% at 10ppm level of the concentration of rare gases in Ar gas, respectively.From the investigations, however, it was found that diatomic ion of overlapped with mass peak of 78Kr(M/e 78) and 80Kr(M/e 80), and mass peak of 20Ne overlapped with divalent ion of Ar(M/e 20). Therefore, in the case of the determination of 87Kr, 80Kr, and 20Ne isotope ratio, it was found that preliminary separation of the rare gases from the Ar or substi- tution of Ar by He gas is necessary.
