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在快堆高温钠系统中,燃料元件包壳和部件材料之间会发生合金元素(特别是碳)的质量迁移现象,并可能导致材料的力学性能变化。这种现象的产生与材料之间合金元素的活度差有关。当在快堆钠系统中采用钛稳定化316不锈钢作包壳、一般316不锈钢作
In fast reactor high-temperature sodium systems, mass migration of alloying elements (especially carbon) occurs between the fuel element cladding and the part material and may result in changes in the mechanical properties of the material. The occurrence of this phenomenon is related to the poor activity of alloying elements between the materials. When used in fast reactor sodium system with titanium stabilized 316 stainless steel cladding, the general 316 stainless steel