Determination of Oxygen Solubility in NaK-78 by Vacuum Distillation Method

Takao SAKAI; Minoru GUNJI; Seio MATSUMOTO; Yoichiro ISHII

doi:10.3327/jnst.20.1032

Takao SAKAI, Minoru GUNJI, Seio MATSUMOTO, Yoichiro ISHII

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Keywords: solubility, oxygen, sodium, potassium, mixture, vacuum distillation, dip sampling, cold trap, blank, temperature dependence, equations, high temperature

JOURNAL FREE ACCESS

1983 Volume 20 Issue 12 Pages 1032-1038

DOI https://doi.org/10.3327/jnst.20.1032

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Abstract

Oxygen solubility in Na-K (22w/o-78w/o) was determined by a vacuum distillation method. A NaK sampling apparatus was installed in a forced convection NaK loop with a cold trap. Subtracting the oxygen blank from oxygen amount calculated from chemically determined quantities of Na and K in the distillation residue and using the least squares method, a following equation for oxygen solubility in NaK over a temperature range of 90210°C was derived
log₁₀S=7.09-2, 795/T,
where S is the oxygen solubility (wppm) and T the absolute temperature (K). This equa-tion was close to those derived for oxygen solubility in Na.

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