Reduction in the fatigue life of structural materials of nuclear components in Light Water Reactor (LWR) water was initially detected and examined by the authors in the 1980s, who subsequently directed considerable effort to the development of a method for evaluating this reduction quantitatively. Since the first proposal of equations to calculate environmental fatigue life reduction for carbon and low-alloy steels was published in 1985 by Higuchi and Sakamoto (J. Iron Steel Inst. Jpn. 71, pp. 101–107), many revisions were made based on a lot of additional fatigue data in various environmental and mechanical test conditions. The latest models for evaluation using of the environmental fatigue life correction factor were proposed for carbon and low alloy steels in the year 2000 and for austenitic stainless steel, in 2002. depends on some essential variables such as material, strain rate, temperature, dissolved oxygen and sulfur concentration in steel. The equation for determining is given by each parameter for each material. These models, having been developed three to five years ago, should be properly revised based on new test results. This paper reviews and discusses five major topics pertinent to such revision.
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February 2007
Research Papers
Review and Consideration of Unsettled Problems on Evaluation of Fatigue Damage in LWR Water
Makoto Higuchi,
Makoto Higuchi
Ishikawajima-Harima Heavy Industries Co., Ltd.
, 1 Shin-nakahara, Isogo-ku, Yokohama, 2358501, Japan
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Katsumi Sakaguchi
Katsumi Sakaguchi
Japan Nuclear Energy Safety Organization
, 3-17-1 Toranomon, Minato-ku, Tokyo, 1050001, Japan
Search for other works by this author on:
Makoto Higuchi
Ishikawajima-Harima Heavy Industries Co., Ltd.
, 1 Shin-nakahara, Isogo-ku, Yokohama, 2358501, Japan
Katsumi Sakaguchi
Japan Nuclear Energy Safety Organization
, 3-17-1 Toranomon, Minato-ku, Tokyo, 1050001, JapanJ. Pressure Vessel Technol. Feb 2007, 129(1): 186-194 (9 pages)
Published Online: June 1, 2006
Article history
Received:
January 18, 2006
Revised:
June 1, 2006
Citation
Higuchi, M., and Sakaguchi, K. (June 1, 2006). "Review and Consideration of Unsettled Problems on Evaluation of Fatigue Damage in LWR Water." ASME. J. Pressure Vessel Technol. February 2007; 129(1): 186–194. https://doi.org/10.1115/1.2409316
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