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http://dx.doi.org/10.5516/NET.07.2013.040

ENVIRONMENTAL FATIGUE OF METALLIC MATERIALS IN NUCLEAR POWER PLANTS - A REVIEW OF KOREAN TEST PROGRAMS  

Jang, Changheui (Department of Nuclear and Quantum Engineering, KAIST)
Jang, Hun (Department of Nuclear and Quantum Engineering, KAIST)
Hong, Jong-Dae (Department of Nuclear and Quantum Engineering, KAIST)
Cho, Hyunchul (Doosan Heavy Industry and Construction)
Kim, Tae Soon (Central Research Institute, KHNP)
Lee, Jae-Gon (Central Research Institute, KHNP)
Publication Information
Nuclear Engineering and Technology / v.45, no.7, 2013 , pp. 929-940 More about this Journal
Abstract
Environmental fatigue of the metallic components in light water reactors has been the subject of extensive research and regulatory interest in Korea and abroad. Especially, it was one of the key domestic issues for the license renewal of operating reactors and licensing of advanced reactors during the early 2000s. To deal with the environmental fatigue issue domestically, a systematic test program has been initiated and is still underway. The materials tested were SA508 Gr.1a low alloy steels, 316LN stainless steels, cast stainless steels, and an Alloy 690 and 52M weld. Through tests and subsequent analysis, the mechanisms of reduced low cycle fatigue life have been investigated for those alloys. In addition, the effects of temperature, dissolved oxygen level, and dissolved hydrogen level on low cycle fatigue behaviors have been investigated. In this paper, the test results and key analysis results are briefly summarized. Finally, an on-going test program for hot-bending of 347 stainless steel is introduced.
Keywords
Environmental Fatigue; Low Cycle Fatigue; Microstructure Effect; Dynamic Strain Ageing; Hydrogen Induced Cracking;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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