The chemical interaction between domestic stainless steel cladding and fission products. Out pile simulation test

The attack of three kinds of stainless steel cladding tubes for FBR by simulation fission products Cs, Te, I, Se under different oxygen potential and Te activity is described. The shallow intergranular corrosion or a negligible corrosion of stainless steel tubes was observed under lower oxygen potential (Cr/Cr2O3 buffer) with maximum interaction depth about 28μm or with non-obvious attack under this condition, while the deeper intergranular corrosion and erosive attack of matrix were observed under higher oxygen potential (Ni/NiO buffer) with maximum attack depth about 100 μm. The depth of FCCI and intergranular corrosion increases with the increasing of oxygen potential and decreases with the increasing of Cs:Te ratio from 1.62 to 4.39