High-energy x-ray ct measurement of void fraction distribution around part length rods in a rod bundle at high pressure and temperatures

Takahiro Arai, Atsushi Ui, Masahiro Furuya, Riichiro Okawa, Tsugumasa Iiyama, Shota Ueda, Kenetsu Shirakawa, Kazuaki Kito

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A boiling experiment was conducted to acquire a threedimensional void fraction distribution in a rod bundle with part length rods. The test section was a 5 × 5 heated rod bundle that partially simulated a BWR rod bundle, and three PLRs were arranged together in the corner. The heated length of the fulllength rod was 3.71 m, which is equal in length to an actual fuel rod in BWRs, whereas the heated length of the PLR was 1.85 m. The rod bundle exhibited an axially and radially uniform heat flux. Further, the local void fraction was quantified by normalizing the intensities in the CT images of the boiling twophase flow with those obtained under the liquid-phase and gasphase conditions. The cross-sectional void fraction distribution was acquired at six height levels. The experimental results exhibited the void distribution around PLRs with respect to a wide range of flow conditions, inlet temperatures, inlet flow rates, bundle thermal powers, and system pressures.

Original languageEnglish
Title of host publicationStudent Paper Competition; Thermal-Hydraulics; Verification and Validation
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Print)9784888982566
Publication statusPublished - 2020
Externally publishedYes
Event2020 International Conference on Nuclear Engineering, ICONE 2020, collocated with the ASME 2020 Power Conference - Virtual, Online
Duration: 2020 Apr 42020 Apr 5

Publication series

NameInternational Conference on Nuclear Engineering, Proceedings, ICONE
Volume3

Conference

Conference2020 International Conference on Nuclear Engineering, ICONE 2020, collocated with the ASME 2020 Power Conference
CityVirtual, Online
Period20/4/420/4/5

Keywords

  • 5×5 rod bundle
  • Boiling two-phase flow
  • Linear accelerator-driven high-energy X-ray computed tomography
  • Part length rod
  • Void fraction distribution

ASJC Scopus subject areas

  • Nuclear Energy and Engineering

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