Conference Proceedings Paper
Environmental Effects on Making Artificial Specimens for Steam Generator Tube ECT Demonstration
9th International Conference on CANDU® Maintenance - 2011 December 04-06
Jaesoo Lim (Korea Hydro and Nuclear Power Company)
Yongseok Kang (Korea Hydro and Nuclear Power Company)
Wangbae Kim (Korea Hydro and Nuclear Power Company)
Sungwoo Kim (Korea Atomic Energy Research Institute)
Nuclear power plants are suffering safety issues caused by cracking, wastage, fretting, or denting of steam generator tubes. Detecting defects is done by ECT and depends on earliness and precision to detect them. Performance Demonstration is the first step to enhance the successful detection and to develop new technologies regarding ECT. PD needs cracked specimens whether they are real or artificial. Three environmental conditions have been tried: hot doped steam, caustic solution, and acidic solution. Combination with acidic for initiation and caustic and/or doped steam for growth was reasonable because of easy control for type, location, and depth of SCC.
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