Study on acoustic resonance and its damping of BWR steam dome
Conference
·
OSTI ID:21021018
- Power and Industrial Systems R and D Laboratory, Hitachi Ltd, 7-2-1 Omika, Hitachi, Ibaraki 319-1221 (Japan)
- Nuclear Design Division, Hitachi Works, Hitachi Ltd, 7-2-1 Omika, Hitachi, Ibaraki 319-1221 (Japan)
Acoustic resonance characteristics in a BWR steam dome are investigated analytically and experimentally to evaluate the acoustic vibration of a steam dryer. Acoustic modes and frequencies of the ABWR, which represents the BWRs in this study, are calculated by the SYSNOISE code. The lowest mode (32 Hz) is a half stand wave anti-symmetric mode to the center line of the steam dome at normal condition. Acoustic pressure distributions and phases on the steam dryer surface are analyzed for evaluating the vibration driving force of the structure. Acrylic 1/11 scale model tests are performed to verify the acoustic analysis and to develop the acoustic damping system. The experimental frequencies and modes agree with analysis ones for low frequencies. Experimentally, the acoustic pressure amplitude is significantly lowered using the Helmholtz resonators after tuning up the acoustic resonant frequency of the resonator to the acoustic resonant frequency of the main system. (authors)
- Research Organization:
- American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
- OSTI ID:
- 21021018
- Country of Publication:
- United States
- Language:
- English
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