Abstract: A mixer pump used in a waste tank for mobilizing high-level radioactive liquid waste having a column assembly containing power cables, a motor housing with electric motor means which includes a stator can of a stator assembly and a rotor can of a rotor assembly, and an impeller assembly with an impeller connected to a shaft of the rotor assembly. The column assembly locates the motor housing with the electric motor means adjacent to the impeller which creates an hydraulic head, and which forces the liquid waste into the motor housing to cool the electric motor means and to lubricate radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the impeller and electric motor means act to grind down large particles in the liquid waste flow. These larger particles are received in slots in the static bearing members of the radial bearing assemblies.

Abstract: A transfer pump used in a waste tank for transferring high-level radioactive liquid waste from a waste tank and having a column assembly, a canned electric motor means, and an impeller assembly with an upper impeller and a lower impeller connected to a shaft of a rotor assembly. The column assembly locates a motor housing with the electric motor means adjacent to the impeller assembly which creates an hydraulic head, and which forces the liquid waste, into the motor housing to cool the electric motor means and to cool and/or lubricate the radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the upper impeller and electric motor means grind large particles in the liquid waste flow.

Abstract: A motor-generator set stator core includes a plurality of flat thin annular winding support plates, a pair of improved annular end plates, and a plurality of elongated flat attachment members for retaining the end plates and support plates assembled together. The improved annular end plates have substantially right triangular configurations in cross-section which are the reverse or a mirror image of one another. At hypotenuses of the right triangular cross-sections of the end plates are inner surfaces which have tapered or conical configurations that are the reverse of one another so as to conform to the outside tapered profile of the end turns of the stator windings. At short sides of the right triangular cross-sections of the end plates are radial planar surfaces which engage the opposite outer side portions of the stacked support plates.

Abstract: Vibration induced by electromagnetic forces at an AC power line frequency are cancelled using inertial masses that are oscillated at the line frequency, out of phase with the vibration induced by the electric power due to operation of a machine. The machine can be a rotating device such as a nuclear reactor coolant pump, that is vibrated at component frequencies and harmonics related to the rotational speed and line frequency as well as sum and difference frequencies due to beating of these frequencies together. Cancellation components at the line frequency and it harmonics minimize the generation of annoying sideband acoustic components, which also may contribute to hearing damage. The line frequency cancellation devices preferably include four inertial mass shakers mounted on the outside of the housing of the pump, at 90.degree.

Abstract: A rotating union used to transmit fluid to and from a rotating shaft includes a hollow tubular housing having inlet and outlet ports defined on an outer end, a set of radial bearings stationarily mounting the tubular housing within an axial bore in the rotating shaft permitting rotation of the rotating shaft relative to the tubular housing and defining an annular fluid cavity flooding the bearings with fluid, and annular seal assemblies sealing the annular fluid cavity at the outer and inner ends of the tubular housing. The union also includes inner and outer hollow tubular pipes disposed in the tubular housing. The inner pipe at its inner end is supported for rotation with the rotating shaft by an annular plug located between infeed and return passages in the rotating shaft.

Abstract: An instrument for measuring on-line the effective partial pressure of dissolved gases in a liquid includes a housing having a flow chamber for connecting in flow communication with a flowing stream of liquid to be measured, and a streamlined V-shaped wing rotatably mounted to the housing and extending across the flow chamber for presenting different angles of attack to the stream of liquid flowing through the housing chamber. The wing has an apex which remains located at a center of the stream of liquid flowing through the housing chamber as the angle-of-attack of the wing is changed relative to the stream of liquid. An actuating mechanism is coupled to the wing for rotating and thereby changing the angle of attack of the wing relative to the stream of liquid flow. A device, such as a viewing window or an acoustical detector, is coupled to the housing for use in identifying the occurrence of incipient cavitation bubbles at the apex of the wing.

Abstract: A pump having a shaft and housing containing pressurized system fluid variable between low pressure at pump startup and high pressure at pump operation, employs a hydrostatic sealing assembly for sealably and rotatably mounting the shaft within the housing. In the assembly, both a runner mounted around the shaft for rotation therewith and a seal ring mounted to the housing have facing surfaces between which pressurized system fluid creates a flowing low pressure fluid film which prevents contact between the facing surfaces so long as a predetermined minimum leakrate is maintained therebetween. First and third seal ring surfaces face in opposite directions with the second surface facing in the same direction as faced by the seal ring facing surface. First and second chambers are defined contiguous to the first and second surfaces with the first chamber in communication with pressurized system fluid and isolated from the second chamber and with the latter isolated from the runner and seal ring facing surfaces.

Abstract: A pump having a shaft and a housing containing pressurized fluid variable in pressure between pump startup and operation, employs a hydrostatic sealing assembly for sealably and rotatably mounting the shaft within the housing. The sealing assembly includes a runner mounted around the shaft for rotation therewith and a seal ring mounted to the stationary housing. The runner and seal ring have facing surfaces between which the pressurized fluid creates a flowing low pressure fluid film which prevents contact between the facing surfaces so long as a predetermined minimum leakrate is maintained therebetween. The seal ring has first and second surfaces facing in a direction opposite to that of its facing surface and in sealingly isolated relationship from one another. The first surface communicates with the pressurized fluid at supply pressure.