Abstract: The invention relates to a filter for purifying a fluid containing ferromagnetic particles.The filter comprises a cylindrical envelope containing steel beads between which the fluid to be purified passes, and a device, at the periphery of the envelope, for magnetizing the beads. It also comprises at least one plate for supporting the beads, which is pierced with holes and arranged transversely at a certain height in the envelope. The fluid is introduced and discharged by means of pipes, one of which opens in the envelope below the plate for supporting the beads, and the other of which passes through the bed of beads, from the bottom, and opens above the bed of beads and below the top of the envelope of the filter.The invention applies in particular to the filtration of the pressurized water of a nuclear reactor using pressurized water.

Abstract: 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.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.The invention is applied in particular to tests in water of pressurized water-cooled reactors.

Abstract: A filter for purifying a fluid containing ferromagnetic particles, e.g. water in the primary circuit of a nuclear reactor using pressurized water, comprises a cylindrical envelope containing steel beads and provided with a coil for magnetizing the beads. The beads are supported in a cylindrical basket located in the cylindrical envelope and the side wall of which is perforated in certain zones. Deflectors are arranged within the basket radially opposite the perforated zones of the basket side wall. Fluid to be purified enters through a central drip tube which is provided with radial perforations in zones radially opposite the deflectors which serve to prevent fluid passing through the beads in a solely radial direction.