Methods for incorporating effects of LWR coolant environment into ASME code fatigue evaluations.

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Description

The ASME Boiler and Pressure Vessel Code provides rules for the construction of nuclear power plant components. Appendix I to Section HI of the Code specifies design fatigue curves for structural materials. However, the effects of light water reactor (LWR) coolant environments are not explicitly addressed by the Code design curves. Recent test data illustrate potentially significant effects of LWR environments on the fatigue resistance of carbon and low-alloy steels and austenitic stainless steels (SSs). Under certain loading and environmental conditions, fatigue lives of carbon and low-alloy steels can be a factor of {approx}70 lower in an LWR environment than ... continued below

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14 p.

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Chopra, O. K. April 15, 1999.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 11 times . More information about this article can be viewed below.

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Description

The ASME Boiler and Pressure Vessel Code provides rules for the construction of nuclear power plant components. Appendix I to Section HI of the Code specifies design fatigue curves for structural materials. However, the effects of light water reactor (LWR) coolant environments are not explicitly addressed by the Code design curves. Recent test data illustrate potentially significant effects of LWR environments on the fatigue resistance of carbon and low-alloy steels and austenitic stainless steels (SSs). Under certain loading and environmental conditions, fatigue lives of carbon and low-alloy steels can be a factor of {approx}70 lower in an LWR environment than in air. These results raise the issue of whether the design fatigue curves in Section III are appropriate for the intended purpose. This paper presents the two methods that have been proposed for incorporating the effects of LWR coolant environments into the ASME Code fatigue evaluations. The mechanisms of fatigue crack initiation in carbon and low-alloy steels and austenitic SSs in LWR environments are discussed.

Physical Description

14 p.

Notes

INIS; OSTI as DE00011104

Medium: P; Size: 14 pages

Source

  • 1999 ASME Pressure Vessel and Piping Conference, Boston, MA (US), 08/01/1999--08/05/1999

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  • Report No.: ANL/ET/CP-97665
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 11104
  • Archival Resource Key: ark:/67531/metadc624001

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  • April 15, 1999

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  • June 16, 2015, 7:43 a.m.

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  • April 7, 2017, 2:32 p.m.

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Chopra, O. K. Methods for incorporating effects of LWR coolant environment into ASME code fatigue evaluations., article, April 15, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc624001/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.