Visualization of dryout phenomenon and liquid film behavior using a single subchannel of a tight lattice bundle

Miyuki Akiba; Shinichi Morooka; Junji Mimatsu; Sinji Sakai; Akira Inoue

doi:10.1615/MultScienTechn.v19.i4.40

Visualization of dryout phenomenon and liquid film behavior using a single subchannel of a tight lattice bundle

Miyuki Akiba^*, Shinichi Morooka, Junji Mimatsu, Sinji Sakai, Akira Inoue

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

The development of fast neutron spectrum boiling water reactors requires understanding of flow behavior in a tight lattice bundle. We conducted experiments to visualize single-channel flow under atmospheric conditions and to measure the critical heat flux (CHF) location and liquid film behavior. The observed flow pattern in the tight lattice was in agreement with the Hewitt-Roberts flow pattern map. CHF occurred at the wider rod gap location. Furthermore, the liquid film flow rate at this location was less than that at the narrow rod gap location. The CHF mechanism in a tight lattice would be the film dryout occurring by decreasing the liquid film flow rate.

Original language	English
Pages (from-to)	363-372
Number of pages	10
Journal	Multiphase Science and Technology
Volume	19
Issue number	4
DOIs	https://doi.org/10.1615/MultScienTechn.v19.i4.40
Publication status	Published - 2007
Externally published	Yes

ASJC Scopus subject areas

Fluid Flow and Transfer Processes

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abstract = "The development of fast neutron spectrum boiling water reactors requires understanding of flow behavior in a tight lattice bundle. We conducted experiments to visualize single-channel flow under atmospheric conditions and to measure the critical heat flux (CHF) location and liquid film behavior. The observed flow pattern in the tight lattice was in agreement with the Hewitt-Roberts flow pattern map. CHF occurred at the wider rod gap location. Furthermore, the liquid film flow rate at this location was less than that at the narrow rod gap location. The CHF mechanism in a tight lattice would be the film dryout occurring by decreasing the liquid film flow rate.",

author = "Miyuki Akiba and Shinichi Morooka and Junji Mimatsu and Sinji Sakai and Akira Inoue",

year = "2007",

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AU - Akiba, Miyuki

AU - Morooka, Shinichi

AU - Mimatsu, Junji

AU - Sakai, Sinji

AU - Inoue, Akira

PY - 2007

Y1 - 2007

N2 - The development of fast neutron spectrum boiling water reactors requires understanding of flow behavior in a tight lattice bundle. We conducted experiments to visualize single-channel flow under atmospheric conditions and to measure the critical heat flux (CHF) location and liquid film behavior. The observed flow pattern in the tight lattice was in agreement with the Hewitt-Roberts flow pattern map. CHF occurred at the wider rod gap location. Furthermore, the liquid film flow rate at this location was less than that at the narrow rod gap location. The CHF mechanism in a tight lattice would be the film dryout occurring by decreasing the liquid film flow rate.

AB - The development of fast neutron spectrum boiling water reactors requires understanding of flow behavior in a tight lattice bundle. We conducted experiments to visualize single-channel flow under atmospheric conditions and to measure the critical heat flux (CHF) location and liquid film behavior. The observed flow pattern in the tight lattice was in agreement with the Hewitt-Roberts flow pattern map. CHF occurred at the wider rod gap location. Furthermore, the liquid film flow rate at this location was less than that at the narrow rod gap location. The CHF mechanism in a tight lattice would be the film dryout occurring by decreasing the liquid film flow rate.

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JO - Multiphase Science and Technology

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Visualization of dryout phenomenon and liquid film behavior using a single subchannel of a tight lattice bundle

Abstract

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