Supercritical CO gas turbine fast reactor, 6; Experimental study of sodium-carbon dioxide reaction, 2

Ishikawa, Hiroyasu ; Miyahara, Shinya  ; Yoshizawa, Yoshio

Supercritical carbon dioxide (CO) is being investigated as a material for a secondary cooling system of sodium (Na) cooled fast reactor in order to avoid Na/water reaction. In this type reactor, however, it is necessary to consider the consequences of Na/CO reaction which might occur in the case of tube rupture in a heat exchanger between primary and secondary systems. Experiments were carried out with test equipment for Na/CO reaction and measured temperatures by thermocouples, which can handle 1-5g order Na. The solid products of Na/CO reaction sampled from the equipment were analyzed by X-ray diffraction (XRD) and chemical analysis. The parts of exhaust gases were analyzed by gas chromatography. From these experimental results, we proved that the reaction was generated between liquid Na and CO.