Validation of failure and leak rate correlations for stress corrosion cracks in steam generator tubes.

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This report summarizes models for the prediction of failure pressures and leak rates under normal operation and design-basis accident conditions in steam generator tubes with axial and circumferential cracks. These models were first validated through failure and leak rate tests at room temperature and at 282 C on tubes with rectangular, triangular, and trapezoidal notches fabricated by electrodischarge machining. They were then compared with failure and leak rate tests conducted on tubes with laboratory-generated outer-diameter stress corrosion cracks and steam generator tubes with field-induced stress corrosion cracks, which have highly complex morphology. Complex crack profiles are addressed using a model ... continued below

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Majumdar, S.; Bakhtiari, S.; Kasza, K. & Park, J. Y. April 12, 2002.

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Description

This report summarizes models for the prediction of failure pressures and leak rates under normal operation and design-basis accident conditions in steam generator tubes with axial and circumferential cracks. These models were first validated through failure and leak rate tests at room temperature and at 282 C on tubes with rectangular, triangular, and trapezoidal notches fabricated by electrodischarge machining. They were then compared with failure and leak rate tests conducted on tubes with laboratory-generated outer-diameter stress corrosion cracks and steam generator tubes with field-induced stress corrosion cracks, which have highly complex morphology. Complex crack profiles are addressed using a model based on the concept of equivalent rectangular cracks. The predictions of the models are in reasonable agreement with test results, the time-dependent initiation and increase of leak rates observed in some tests cannot be predicted by the model.

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  • Other Information: PBD: 12 Apr 2002

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  • Report No.: ANL-01/34
  • Grant Number: W-31-109-ENG-38
  • DOI: 10.2172/799855 | External Link
  • Office of Scientific & Technical Information Report Number: 799855
  • Archival Resource Key: ark:/67531/metadc742045

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Office of Scientific & Technical Information Technical Reports

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  • April 12, 2002

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  • Oct. 19, 2015, 7:39 p.m.

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  • March 24, 2016, 3:36 p.m.

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Majumdar, S.; Bakhtiari, S.; Kasza, K. & Park, J. Y. Validation of failure and leak rate correlations for stress corrosion cracks in steam generator tubes., report, April 12, 2002; Illinois. (digital.library.unt.edu/ark:/67531/metadc742045/: accessed December 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.