Measurement of Void Fraction Distribution in a Sphere-Packed Bed Using X-Ray Imaging

In the safety study on a sodium-cooled fast reactor, it is assumed that the high-temperature fuel debris are formed because of a core disruptive accident. During the cooling of the fuel debris, gas-liquid two-phase flow can be generated in the debris due to the coolant boiling. To improve the predic...

Full description

Saved in:
Bibliographic Details
Published inJapanese journal of multiphase flow Vol. 37; no. 1; pp. 79 - 85
Main Authors YAMAMOTO, Seishiro, ODAIRA, Naoya, ITO, Daisuke, ITO, Kei, SAITO, Yasushi, IMAIZUMI, Yuya, MATSUBA, Kenichi, KAMIYAMA, Kenji
Format Journal Article
LanguageEnglish
Japanese
Published Osaka City Japan Science and Technology Agency 15.03.2023
Subjects
Debris
Flow characteristics
Fuels
High temperature
Nuclear safety
Packed beds
Sodium cooled reactors
Two dimensional flow
Two phase flow
Void fraction
X ray imagery
Online AccessGet full text

Cover

More Information
Summary:In the safety study on a sodium-cooled fast reactor, it is assumed that the high-temperature fuel debris are formed because of a core disruptive accident. During the cooling of the fuel debris, gas-liquid two-phase flow can be generated in the debris due to the coolant boiling. To improve the prediction accuracy of the flow characteristics, detailed measurement of the gas-liquid two-phase flow in the debris bed is required. In this study, gas-liquid two-phase flow in a quasi-two-dimensional sphere-packed bed, which simulates the debris bed, is visualized by using X-ray imaging. The experimental results show that the local void fraction increases near the splitting section in the packed bed and decreases near the coalescence section.
ISSN:0914-2843
1881-5790
DOI:10.3811/jjmf.2023.008