Application of environmental fatigue stress rules to carbon steel reactor piping. Volume 1. Executive summary. Final report

Technical Report · Tue Jul 01 04:00:00 EDT 1986

OSTI ID:5594607

Mehta, H S; Ranganath, S; Weinstein, D

Based on extensive laboratory data base for environmental effects on fatigue crack initiation of carbon steel in high-temperature oxygenated water, correction factors to the ASME Section III Code equation for fatigue design of piping were developed. Procedures were devised for application of the modified equation whereby reactor transients can be accounted for without excessive usage factor penalty. An example of the conservatism resulting from use of the modified equation is presented. To facilitate application of the stress rules equations and to encourage use by the designer, a computer program was developed to automate the procedure. In addition, a handbook was prepared outlining a stepwise, decision-tree process for use of the stress rule equations. The ultimate benefit is additional margin precluding environmentally accelerated fatigue crack initiation.

• Research Organization: General Electric Co., San Jose, CA (USA). Nuclear Engineering Div.
• OSTI ID: 5594607
• Report Number(s): EPRI-NP-4644-M-Vol.1; ON: TI86920408
• Country of Publication: United States
• Language: English

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