Minimizing unbalance response of the CRBRP sodium pumps
The unbalance response characteristics of the vertical pumps for the Clinch River Breeder Reactor (CRBRP) are investigated. Finite-element shell and beam models representative of the pump-motor structure are developed to assess structural stiffnesses of dominant joints, including the foundation support stiffness, so as to exclude the danger of resonant excitation during normal operation. Based on 1/2% modal damping ratio and balance quality grade of ISO/ANSI 2.5 for the rotating components motor rotor, pump shaft, Bendix diaphragm-type flexible coupling, and centrifugal double-suction impeller, 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. 4 figures, 5 tables.
- Research Organization:
- Breeder Reactor Corporation, Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EY-76-C-15-2395; EY-76-C-15-1200
- OSTI ID:
- 710688
- Report Number(s):
- CRBRP-PMC-79-04
- Resource Relation:
- Other Information: PBD: 1979; Related Information: Is Part Of Clinch River Breeder Reactor Plant. Technical review, Fall 1979; Hill, E.H. (ed.); PB: 31-40 p.
- Country of Publication:
- United States
- Language:
- English
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