한국표면공학회지 (40권6호 271-278)
Development of Chemical Decontamination Process of Stainless Steel for Reactor Coolant Pump(II)
원자로 냉각재 펌프용 스테인리스강에 대한 화학적 제염 공정 개발(II)
김성종;김정일;김기준;
Kim, Seong-Jong;Kim, Jeong-Il;Kim, Ki-Joon;
목포해양대학교;한국해양대학교;
Division of Marine System Engineering, Mokpo Maritime University;Division of Marine System Engineering, Korea Maritime University;
In this study, applicable possibility in chemical decontamination for reactor coolant pump(RCP) was investigated for the various stainless steels. The stainless steel(STS) 304 showed the best electrochemical properties for corrosion current density and the lowest weight loss ratio in chemical decontamination process model 3-3 than other materials. The weightloss quantity in chemical decontamination process model 3-3 presents the lowest value compare to the other chemical decontamination process model 1, 2, 3-1 and 3-2. In the case of SEM observation, the pitting corrosion was generated in both STS 415 and STS 431 with the increasing numbers of cycle. The intergranular corrosion in STS 431 was sporadically observed. The sizes of their pitting corrosion were also increased with increasing cycle numbers.
Reactor coolant pump;Chemical decontamination;Corrosion current density;Stainless steel;
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