Device for measuring the flow rate of cooling fluid at the inlet of the core of a water-cooled reactor

摘要

The invention relates to a device for measuring the flow rate of cooling fluid at the inlet of the core of a water-cooled reactor. P P The device comprises a base secured to the bottom plate of the core, a vertical cylindrical casing called measuring chimney, a support structure for bearings disposed along the axis of the measuring chimney, a two-blade propeller of nonmagnetic material the shaft of which rotates in the axial bearings, one of the blades bearing a component of magnetic material, and a measuring coil supplied with direct current generating pulses to a frequency-measuring device when the magnetic component of the propeller moves in front of the coil, when the propeller is rotated by the cooling fluid travelling along the measuring chimney. P PThe invention is applied in particular to tests in water of pressurized water-cooled reactors.