Assessment of large scale pipe tests by fracture mechanics approximation procedures with regard to leak-before-break

Roos, Eberhard; Herter, Karl-Heinz; Julisch, P.; Bartholome, G.; Senski, G.

doi:10.1016/0029-5493(89)90156-8

Cited by 22 publications

(2 citation statements)

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“…In order to detect the leak, leak rates through cracks [47]- [49] have to be evaluated to validate the leak detection system. Explicit equations for leak rates through narrow cracks (single phase flow) have been developed for four distinct flow regimes [52] using experimental work.…”

Section: Past and Future Researchmentioning

confidence: 99%

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Leak-before-break: Global perspectives and procedures

Bourga

Moore

Janin

et al. 2015

International Journal of Pressure Vessels and Piping

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Structural integrity of components containing fluids is critical for economic, environmental and safety issues. Any risk of catastrophic failure, in the form of either brittle or ductile manner, is not acceptable across the industries. Consequently, many efforts have been invested in the structural integrity aspect to improve the assessment methodologies. One of the ways to aid the decision whether or not to live with the defect is through the demonstration of Leak-Before-Break (LBB). LBB which is a well-established practice in the nuclear industry, albeit as a defence-in-depth argument or to justify the elimination of pipe whip restraints, also finds its applicability in other industries. A review of the available procedures, their associated limitations and the research carried out in the last thirty years is presented in this paper. Application of this concept within non-nuclear industries is also discussed. Leak- AbstractStructural integrity of components containing fluids is critical for economic, environmental and safety issues. Any risk of catastrophic failure, in the form of either brittle or ductile manner, is not acceptable across the industries. Consequently, many efforts have been invested in the structural integrity aspect to improve the assessment methodologies. One of the ways to aid the decision whether or not to live with the defect is through the demonstration of Leak-Before-Break (LBB). LBB which is a well-established practice in the nuclear industry, albeit as a defence-in-depth argument or to justify the elimination of pipe whip restraints, also finds its applicability in other industries. A review of the available procedures, their associated limitations and the research carried out in the last thirty years is presented in this paper. Application of this concept within non-nuclear industries is also discussed.

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Section: Past and Future Researchmentioning

confidence: 99%

“…Finite element modelling [47], large scale plate experiments [48] and pipe experiments [49] have been conducted to assess crack shape development. Complex shaped crack analysis can also be found in [50], [51].…”

Section: Past and Future Researchmentioning

confidence: 99%