Experimental Study of Three-Dimensional Void Fraction Distribution in Heated Tight-Lattice Rod Bundles Using Three-Dimensional Neutron Tomography

• KURETA Masatoshi

  Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency

抄録

Three-dimensional (3D) void fraction distributions in a tight-lattice of heated 7- or 14-rod bundles were measured using 3D neutron tomography. The distribution was also studied parametrically from the thermal-hydraulic point of view in order to elucidate boiling phenomena in a fuel assembly of the FLWR which is being developed as an advanced BWR-type reactor. 7-rod tests were carried out to obtain high void fraction data. 14-rod tests were conducted for visualization and discussion of the 3D distribution extending from the vapor generation region to the high void fraction region at one time. Experimental data were obtained under atmospheric pressure with mass velocity, heater power and inlet quality as the test parameters. It was found from the visualization of data that the void fraction at the channel center became higher than that at the periphery, high void fraction spots appeared in narrow regions at the inlet, and a so-called 'vapor chimney' was generated at the center of a subchannel.

収録刊行物

• Journal of Power and Energy Systems

  Journal of Power and Energy Systems 1 (3), 225-238, 2007

  一般社団法人 日本機械学会

キーワード

• Void Fraction
• Neutron Radiography
• Rod Bundle
• CT
• Tomography
• Boiling
• Flow Visualization
• Flow Measurement
• Digital Image Processing
• FLWR

詳細情報

• CRID: 1390282680248834816
• NII論文ID: 130000072775
• DOI: 10.1299/jpes.1.225
• ISSN: 18813062
• Web Site: http://www.jstage.jst.go.jp/article/jpes/1/3/1_3_225/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可