Draft ASME Section III Division 5 Code Cases to extend EPP strain limits and creep-fatigue design methods to Grade 91
- Argonne National Lab. (ANL), Argonne, IL (United States)
This report describes the drafting of Code Cases extending the ASME Boiler and Pressure Vessel Code Section III, Division 5, Subsection HB, Subpart B design by elastic perfect-plastic (EPP) analysis methods to Grade 91 steel. The primary technical challenge is that Grade 91 steel is a cyclic softening material and so modifications to the current ASME design approach for austenitic stainless steel were required to produce conservative designs. Previous work established the technical basis required to support these modifications. This report provides the full package for balloting by ASME – both revised Code Case language and associated background documentation for two nuclear code cases: N-861 covering ratcheting strain limits and N-862 covering creep-fatigue damage. The completion of this work and successful balloting at ASME, currently underway, allows designers to apply the efficient EPP methods to Grade 91 high temperature structural components.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Nuclear Energy (NE), Reactor Fleet and Advanced Reactor Development. Office of Nuclear Energy Technologies
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1601811
- Report Number(s):
- ANL-ART-165; 158585
- Country of Publication:
- United States
- Language:
- English
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