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Release : 1986
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Book Synopsis Chemical Interaction of Metallic Fuel with Austenitic and Ferritic Stainless Steel Cladding by :

Download or read book Chemical Interaction of Metallic Fuel with Austenitic and Ferritic Stainless Steel Cladding written by . This book was released on 1986. Available in PDF, EPUB and Kindle. Book excerpt: The combination of metallic fuel and stainless steel cladding in a fuel element forms a complex multicomponent diffusion couple at elevated temperatures. Interdiffusion of fuel and cladding components can in principle lead to several phenomena that could affect the reliable performance of a fuel element. These phenomena include the formation of strength reducing diffusion zones in the cladding, intergranular penetration of fuel components into the cladding, and the formation of compositional zones with melting points below the anticipated operating temperatures. A series of ex-reactor tests were performed to assess and study this potential problem in fuel elements consisting of U-Zr, U-Pu-Zr fuel clad in Ti stabilized austenitic stainless steel (D9) and ferritic stainless steel (HT-9). Diffusion couples of various combinations of fuel and the different steels were annealed at temperatures ranging from 650°C to 800°C for up to 3000 h in an argon atmosphere. The post-test analysis of the diffusion couples included: metallographic examinations, scanning electron microscopy, and scanning Auger microscopy.