配管の高圧流体によるジェット力と破壊裕度評価

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タイトル別名
  • Assessment of the fracture margin and jet force caused by high-pressurized fluid for cracked pipes.
  • ハイカン ノ コウアツ リュウタイ ニ ヨル ジェットリョク ト ハカイ ユウ

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抄録

Piping systems for power plants are designed to withstand hypothetical events such as leakage from a crack and jet impingement. The assumed event, in this paper, is that high-pressure water leaks from circumferential through-wall cracks in a carbon steel pipe. Sizes of the cracks detected by leak monitors under normal operations are calculated from the analyses of fracture mechanics and fluid mechanics. Crack-opening areas for jet force assessment are obtained for various diameter pipes under abnormal conditions. The areas are compared with the 0.1F (10% of pipe cross section) criterion. Large diameter pipes are shown to have large safety margins against fracture from the viewpoint of leak monitors and jet force assessment.

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