Hydrogen and Oxygen Behavior in Liquid Sodium (Experimental)

Publisher Website
Google Scholar
Abstract
Hydrogen and oxygen behaviors in a sodium test loop similar to the sodium-cooled fast breeder reactor were examined. Hydrogen partial pressure equilibrated to the sodium was measured by a membrane-permeation-type hydrogen-meter. An electrochemical oxygen-meter was used to determine the oxygen activity. The measured hydrogen pressure was converted to the hydrogen concentration through the Sieverts’ constant, and the oxygen activity was also converted to the oxygen concentration through the characteristics of the oxygen-meter cells. Hydrogen and oxygen solubilities in liquid sodium were obtained as functions of the cold-trap temperature from 115 to 208°C. Both data have a similar temperature dependence and were anomalously larger than the extrapolated values in the temperature region lower than 180°C. At 300°C, the addition of hydrogen to the liquid sodium, valved off from the purification apparatus, lowered the oxygen activity in the liquid sodium. The experimental results suggest a significant int...