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http://dx.doi.org/10.14773/cst.2011.10.5.167

Evaluation on Safety of Stainless Steels in Chemical Decontamination Process with Immersion Type of Reactor Coolant Pump for Nuclear Reactor  

Kim, Seong-Jong (Division of Marine Engineering, Mokpo Maritime University)
Han, Min-Su (Division of Marine Engineering, Mokpo Maritime University)
Kim, Ki-Joon (Faculty of Marine Engineering, Korea Maritime University)
Jang, Seok-Ki (Division of Marine Engineering, Mokpo Maritime University)
Publication Information
Corrosion Science and Technology / v.10, no.5, 2011 , pp. 167-174 More about this Journal
Abstract
Due to commercialization of nuclear power, most countries have taken interest in decontamination process of nuclear power plant and tried to develop a optimum process. Because open literature of the decontamination process are rare, it is hard to obtain skills on decontamination of foreign country and it is necessarily to develop proper chemical decontamination process system in Korea. 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 resistance and the lowest weight loss ratio in chemical decontamination process with immersion type than other materials. However, 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 also increased with increasing cycle numbers.
Keywords
reactor coolant pump; chemical decontamination process; corrosion resistance; stainless steel;
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