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Deterministic Prediction of Stress Corrosion Crack Growth Rates in High Temperature Water by Combination of Interface Oxidation Kinetics and Crack Tip Asymptotic Field

[+] Author Affiliations
Tetsuo Shoji, Zhanpeng Lu, Yoichi Takeda, Hiroyoshi Murakami, Chaoyang Fu

Tohoku University, Sendai, Japan

Paper No. PVP2008-61417, pp. 1109-1136; 28 pages
  • ASME 2008 Pressure Vessels and Piping Conference
  • Volume 6: Materials and Fabrication, Parts A and B
  • Chicago, Illinois, USA, July 27–31, 2008
  • Conference Sponsors: Pressure Vessels and Piping
  • ISBN: 978-0-7918-4829-6
  • Copyright © 2008 by ASME


Proper disposition of the environmentally assisted crack growth rate in terms of key engineering parameters is crucial for safe and economic long term operation of light water reactors. Accurately predicting stress corrosion crack growth rate requires the quantification of crack tip mechanics, crack tip oxidation kinetics and their interactions. Crack tip strain rate has been categorized as a fundamental parameter for stress corrosion cracking of austenitic alloys in light water reactor environments. Continuum mechanics is applied to quantify crack tip strain rate based on the crack tip asymptotic field. A general oxidation kinetics formulation is proposed based on solid state mass transport theory. Stress corrosion crack growth rates of austenitic alloys in high temperature water environments are formulated as a function of various engineering parameters by combination of interface oxidation kinetics and the crack tip asymptotic field. Recent experimental results of stress corrosion crack growth rates in simulated boiling water reactor and pressurized water reactor environments are analyzed and reflected in the model development and application. The importance of surface integrity on plant safety is emphasized. The plant material aging management methodology is applied to the recent cracking issues in light water reactors.

Copyright © 2008 by ASME



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