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Vol.48, No.5, 410 ~ 417, 2010
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| Title |
| Compatibility Study between 316-series Stainless Steel and Sodium Coolant |
| 김준환 Jun Hwan Kim , 김종만 Jong Man Kim , 차재은 Jae Eun Cha , 김성호 Sung Ho Kim , 이찬복 Chan Bock Lee |
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| Abstract |
| Studies were carried out to establish the technology for sodium-clad compatibility and to analyze the compatibility behavior of the Sodium-cooled Fast Reactor (SFR) cladding material under a flowing sodium environment. The natural circulation facility caused by the thermal convection of the liquid sodium was constructed and the 316-series stainless steels were exposed at 650℃ liquid sodium for 1458 hours. The weight change and related microstructural change were analyzed. The results showed that the quasi-dynamic facility represented by the natural convection exhibited similar results compared to the conventional dynamic facility. Selective leaching and local depletion of the chromium, re-distribution of the carbide, and the decarburization process took place in the 316-series stainless steel under a flowing sodium environment. This process decreased as the sodium flowed along the channel, which was caused by the change in the dissolved oxygen and carbon activity in the liquid sodium. |
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| Key Words |
| metals, aging, embrittlement, indentation, sodium |
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