Liquid film thickness on fuel rod under high pressure and high temperature steam-water two phase flow

Michio Sato; Shinichi Morooka; Kenetsu Shirakawa; Yasushi Yamamoto; Kazumi Watanabe; Ryoichi Arai

Liquid film thickness on fuel rod under high pressure and high temperature steam-water two phase flow

Michio Sato, Shinichi Morooka, Kenetsu Shirakawa, Yasushi Yamamoto, Kazumi Watanabe, Ryoichi Arai

Research output: Contribution to journal › Article

Abstract

This paper deals with behavior of liquid film on the fuel rod which is very important for the critical power prediction. In this study, the liquid film measurement device using an ultrasonic transducer has been developed and the liquid film thickness data has been obtained for a simulated BWR 4×4 rod bundle under 1 MPa condition. The cooling fluid is steam-water mixture and flow direction is vertical. Also the following results were obtained. Firstly, the liquid film thickness becomes thinner with increasing quality and the liquid film thickness is about 0.2 mm at 9.3% of quality. Secondary, the time change of liquid film thickness becomes smaller with increasing the quality. It was found that the change of liquid film thickness becomes more smoothly near the dryout condition.

Original language	English
Pages (from-to)	14-24
Number of pages	11
Journal	Transactions of the Atomic Energy Society of Japan
Volume	5
Issue number	1
Publication status	Published - 2006
Externally published	Yes

Keywords

Boiling transition
BWR type reactors
Dryout
Liquid film
Ultrasonic echo

ASJC Scopus subject areas

Nuclear Energy and Engineering

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Sato, M., Morooka, S., Shirakawa, K., Yamamoto, Y., Watanabe, K., & Arai, R. (2006). Liquid film thickness on fuel rod under high pressure and high temperature steam-water two phase flow. Transactions of the Atomic Energy Society of Japan, 5(1), 14-24.

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abstract = "This paper deals with behavior of liquid film on the fuel rod which is very important for the critical power prediction. In this study, the liquid film measurement device using an ultrasonic transducer has been developed and the liquid film thickness data has been obtained for a simulated BWR 4×4 rod bundle under 1 MPa condition. The cooling fluid is steam-water mixture and flow direction is vertical. Also the following results were obtained. Firstly, the liquid film thickness becomes thinner with increasing quality and the liquid film thickness is about 0.2 mm at 9.3% of quality. Secondary, the time change of liquid film thickness becomes smaller with increasing the quality. It was found that the change of liquid film thickness becomes more smoothly near the dryout condition.",

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author = "Michio Sato and Shinichi Morooka and Kenetsu Shirakawa and Yasushi Yamamoto and Kazumi Watanabe and Ryoichi Arai",

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T1 - Liquid film thickness on fuel rod under high pressure and high temperature steam-water two phase flow

AU - Sato, Michio

AU - Morooka, Shinichi

AU - Shirakawa, Kenetsu

AU - Yamamoto, Yasushi

AU - Watanabe, Kazumi

AU - Arai, Ryoichi

PY - 2006

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N2 - This paper deals with behavior of liquid film on the fuel rod which is very important for the critical power prediction. In this study, the liquid film measurement device using an ultrasonic transducer has been developed and the liquid film thickness data has been obtained for a simulated BWR 4×4 rod bundle under 1 MPa condition. The cooling fluid is steam-water mixture and flow direction is vertical. Also the following results were obtained. Firstly, the liquid film thickness becomes thinner with increasing quality and the liquid film thickness is about 0.2 mm at 9.3% of quality. Secondary, the time change of liquid film thickness becomes smaller with increasing the quality. It was found that the change of liquid film thickness becomes more smoothly near the dryout condition.

AB - This paper deals with behavior of liquid film on the fuel rod which is very important for the critical power prediction. In this study, the liquid film measurement device using an ultrasonic transducer has been developed and the liquid film thickness data has been obtained for a simulated BWR 4×4 rod bundle under 1 MPa condition. The cooling fluid is steam-water mixture and flow direction is vertical. Also the following results were obtained. Firstly, the liquid film thickness becomes thinner with increasing quality and the liquid film thickness is about 0.2 mm at 9.3% of quality. Secondary, the time change of liquid film thickness becomes smaller with increasing the quality. It was found that the change of liquid film thickness becomes more smoothly near the dryout condition.

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KW - BWR type reactors

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KW - Liquid film

KW - Ultrasonic echo

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