Instability in current flow in a model of a light water reactor

Components of measuring equipment for the model of a light water (nuclear) reactor include a Brueel and Kjaer capacitative pressure generator, an oscillator, a reactance converter and a variable filter. Pressure values measured in actual model experiments near the thermal shield of the reactor are given. Amplitude probability, density and other factors are analysed as functions of the axial and circumferential geometrical parameters. A summary is given for the results of boundary layer flow conditions in the ducts and near the vessel walls; graphical functions plotted include the spatial correlation coefficients. (G.C.)