| Title |
Compatibility Study between 316-series Stainless Steel and Sodium Coolant |
| Authors |
김준환(Jun Hwan Kim); 김종만(Jong Man Kim); 차재은(Jae Eun Cha); 김성호(Sung Ho Kim); 이찬복(Chan Bock Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2010.48.05.410 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
metals; aging; embrittlement; indentation; sodium |
| 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. |