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Title: Submersible canned motor transfer pump

Abstract

A transfer pump is described which is 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. Slots in the static bearing member of the radial bearing assemblies further grind down the solid waste particles so that only particles smaller than the clearances in the system can pass there through, thereby resisting damage to and the interruption of the operation of the transfer pump. The column assembly is modular so that sections can be easily assembled, disassembled and/or removed. A second embodiment employs a stator jacket which provides anmore » alternate means for cooling the electric motor means and lubricating and/or cooling the bearing assemblies, and a third embodiment employs a variable level suction device which allows liquid waste to be drawn into the transfer pump from varying and discrete levels in the waste tank. 17 figs.« less

Inventors:
; ; ;
Issue Date:
Research Org.:
Westinghouse Hanford Co
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
527765
Patent Number(s):
5,659,214
Application Number:
PAN: 8-397,801; TRN: 97:016697
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (United States) RLO; SCA: 052002; PA: EDB-97:124181; SN: 97001843786
DOE Contract Number:  
AC06-87RL10930
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 19 Aug 1997
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; HIGH-LEVEL RADIOACTIVE WASTES; PUMPS; DESIGN; STORAGE FACILITIES; ELECTRIC MOTORS; MIXERS; OPERATION; LIQUID WASTES; PULVERIZERS; COOLING SYSTEMS; RADIOACTIVE WASTE STORAGE

Citation Formats

Guardiani, R.F., Pollick, R.D., Nyilas, C.P., and Denmeade, T.J. Submersible canned motor transfer pump. United States: N. p., 1997. Web.
Guardiani, R.F., Pollick, R.D., Nyilas, C.P., & Denmeade, T.J. Submersible canned motor transfer pump. United States.
Guardiani, R.F., Pollick, R.D., Nyilas, C.P., and Denmeade, T.J. Tue . "Submersible canned motor transfer pump". United States.
@article{osti_527765,
title = {Submersible canned motor transfer pump},
author = {Guardiani, R.F. and Pollick, R.D. and Nyilas, C.P. and Denmeade, T.J.},
abstractNote = {A transfer pump is described which is 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. Slots in the static bearing member of the radial bearing assemblies further grind down the solid waste particles so that only particles smaller than the clearances in the system can pass there through, thereby resisting damage to and the interruption of the operation of the transfer pump. The column assembly is modular so that sections can be easily assembled, disassembled and/or removed. A second embodiment employs a stator jacket which provides an alternate means for cooling the electric motor means and lubricating and/or cooling the bearing assemblies, and a third embodiment employs a variable level suction device which allows liquid waste to be drawn into the transfer pump from varying and discrete levels in the waste tank. 17 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {8}
}