In a wall crack accident or loss-of-coolant accident (LOCA) in an advanced reactor with water filled containment, high pressure saturated water is discharged from the pressure vessel into the low-pressure, low-temperature water of the containment. The discharged saturated water causes flashing and generates steam. Steam is then condensed by the water in the containment. This paper describes our study of high pressure saturated water that rapidly contacts low-pressure, low-temperature water. The purpose of the study was to clarify the transient phenomena that occur when high pressure saturated water blows down from a pressure vessel into a water filled containment during a wall crack accident or LOCA in an advanced reactor. The experimental results revealed that flashing of high-pressure saturated water and a subsequent water hammer occurred under the specified experimental settings. Pressure peaked when steam generation or flashing occurred at the wall surface and the flashing steam condensed. After the peak, pressure oscillated and reached equilibrium condition in a short time. The pressure oscillation might have been caused by a balancing action between the flashing of high pressure saturated water and condensation of the steam generated by flashing in low-pressure, low-temperature water. To check the results of the experiments, numerical analyses were conducted. The numerical results cleared the mechanism behind flashing hammer phenomenon.
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ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
July 6–10, 2003
Honolulu, Hawaii, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-3696-7
PROCEEDINGS PAPER
Flashing Hammer Phenomenon in Rapid Liquid-Liquid Contact
Tatsuya Koga,
Tatsuya Koga
Tokyo University of Mercantile Marine, Tokyo, Japan
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Tomoji Takamasa,
Tomoji Takamasa
Tokyo University of Mercantile Marine, Tokyo, Japan
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Tatsuya Hazuku,
Tatsuya Hazuku
Tokyo University of Mercantile Marine, Tokyo, Japan
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Norihiro Fukamachi,
Norihiro Fukamachi
Tokyo University of Mercantile Marine, Tokyo, Japan
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Akira Saito,
Akira Saito
Toyama National College of Maritime Technology, Shinminato, Toyama, Japan
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Izuo Aya
Izuo Aya
National Maritime Research Institute, Katano, Osaka, Japan
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Tatsuya Koga
Tokyo University of Mercantile Marine, Tokyo, Japan
Tomoji Takamasa
Tokyo University of Mercantile Marine, Tokyo, Japan
Tatsuya Hazuku
Tokyo University of Mercantile Marine, Tokyo, Japan
Norihiro Fukamachi
Tokyo University of Mercantile Marine, Tokyo, Japan
Akira Saito
Toyama National College of Maritime Technology, Shinminato, Toyama, Japan
Izuo Aya
National Maritime Research Institute, Katano, Osaka, Japan
Paper No:
FEDSM2003-45277, pp. 2981-2987; 7 pages
Published Online:
February 4, 2009
Citation
Koga, T, Takamasa, T, Hazuku, T, Fukamachi, N, Saito, A, & Aya, I. "Flashing Hammer Phenomenon in Rapid Liquid-Liquid Contact." Proceedings of the ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. Volume 1: Fora, Parts A, B, C, and D. Honolulu, Hawaii, USA. July 6–10, 2003. pp. 2981-2987. ASME. https://doi.org/10.1115/FEDSM2003-45277
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