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<p>This study proposes a multi-net trash barrier system to ensure water intake safety in nuclear power plants, comprising various planar nets and net bags supported by piles and anchor blocks. A comprehensive physical model experiment was conducted in a three-dimensional wave basin to investigate the mooring forces on this barrier. The research analyzes the effect of blockage levels on the dynamic responses of pile-supported and floating nets within blockage ratios of 10%–70% under current-only, wave-only, and wave-current conditions. For optimal net span design, the study examines curvatures ranging from 0.2% to 18.6%, representing the extension proportion of arc length compared to straight-line distance in a span. Results indicate that combined water intake and wave action effects generate substantial forces on the net barrier, requiring careful consideration during design. Higher blockage ratios and lower curvatures correspond to increased net barrier tensions. For practical engineering applications, the recommended curvature for floating net barriers ranges from 7% to 10% for optimal net arc length design.</p>

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Experimental Investigation on the Hydrodynamic Forces of the Multi-Net Trash Barrier System Under Wave-Current Combinations

  • 期刊论文

  • 发表日期：

    2026年2月16日

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  • Yun-jia Sun,
  • Guang-jia Ding,
  • Ying-xue Lyu,
  • Yue Song,
  • Xing-yu Ji

摘要

This study proposes a multi-net trash barrier system to ensure water intake safety in nuclear power plants, comprising various planar nets and net bags supported by piles and anchor blocks. A comprehensive physical model experiment was conducted in a three-dimensional wave basin to investigate the mooring forces on this barrier. The research analyzes the effect of blockage levels on the dynamic responses of pile-supported and floating nets within blockage ratios of 10%–70% under current-only, wave-only, and wave-current conditions. For optimal net span design, the study examines curvatures ranging from 0.2% to 18.6%, representing the extension proportion of arc length compared to straight-line distance in a span. Results indicate that combined water intake and wave action effects generate substantial forces on the net barrier, requiring careful consideration during design. Higher blockage ratios and lower curvatures correspond to increased net barrier tensions. For practical engineering applications, the recommended curvature for floating net barriers ranges from 7% to 10% for optimal net arc length design.