Minimizing unbalance response of the CRBRP sodium pumps

Conference · Sun Apr 01 00:00:00 EST 1979

OSTI ID:6269420

Gupta, V K; Marrujo, F G

The unbalance response characteristics of the vertical pumps for the Clinch River Breeder Reactor Plant are investigated. Finite-element shell and beam models representative of the pump-motor structure including the rotating assembly are developed to assess structural stiffnesses of dominant joints as well as the foundation support stiffness so as to exclude the danger of resonant excitation during normal operation. Less than four mils peak-to-peak vibration amplitude at the pump tank discharge nozzle results from just 10% frequency separation between the first rocking mode and the maximum operating speed of 1116 RPM, based on 0.5% modal damping ratio and balance quality grade of ISO/ANSI G2.5 for the rotating components: motor rotor, pump shaft, Bendix diaphragm-type flexible coupling, and centrigual double-suction impeller. Several design options are explored for raising shaft critical speed beyond 125% of maximum operating speed.

• Research Organization: General Electric Co., Sunnyvale, CA (USA). Advanced Reactor Systems Dept.
• DOE Contract Number: EY-76-C-15-0003
• OSTI ID: 6269420
• Report Number(s): GEFR-SP-130; CONF-790802-17; TRN: 79-015649
• Resource Relation: Conference: International conference on structural mechanics in reactor technology, Berlin, F.R. Germany, 13 Aug 1979
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
CLINCH RIVER BREEDER REACTOR
PUMPS
MECHANICAL VIBRATIONS
PERFORMANCE
PRIMARY COOLANT CIRCUITS
BREEDER REACTORS
COOLING SYSTEMS
EPITHERMAL REACTORS
FAST REACTORS
FBR TYPE REACTORS
LIQUID METAL COOLED REACTORS
POWER REACTORS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
SODIUM COOLED REACTORS
210500* - Power Reactors
Breeding