Determination of the main parameters of the process of boric acid droplet entrainment from the WWER reactor in case of an accident

Abstract

Abstract The article presents the results of a calculation study of the process of mass transfer of boric acid from a WWER reactor in the event of an accident. An analysis of the literature data in this field of study was carried out. As a result, it was found that studies of the mass transfer of boric acid were performed with parameters not typical for the emergency operation of passive safety systems of nuclear power plants with WWER. The results of the calculation of the main parameters in the WWER reactor in the event of an accident with a rupture of the main circulation circuit are shown. The calculation analysis allowed us to determine that the maximum diameter of the droplets entrained by the steam is in the range 0.11-0.23 mm.