Hydrodynamics of submerged perforated sheets of NPP steam generators

The results of experimental investigation of hydrodynamics of submerged perforated sheets using the steam generator model under pressure of 6.85 MPa, steam rate evaporation surface of 0.1-0.65 m/s under uniform and non uniform supply of steam water mixture are presented. The conditions of formation of steam space and its stability for sheets with relative cross section 6.2 and 13.9% are determined. It is shown that the submerged sheets with steam space effectively smooth out the steam load of the evaporation surface. The dependences of water flow rate circulating through the sheet on steam load of the evaporation surface giving the possibility to develop the well-founded technique of submerged perforated sheets calculation are obtained