SYMPOSIA PAPER Published: 01 January 1999
STP13905S

The Effects of Phase Stability on Void Swelling in P, Ti-Modified 316 Stainless Steels During Neutron Irradiation

Source

Commercially developed 20% cold-worked P,Ti-modified 316 stainless steel claddings were irradiated as fuel pins in C-type irradiation rigs of JOYO under typical fast reactor conditions. The microstructural changes of irradiated claddings at temperatures around 500 °C were extensively analyzed using transmission electron microscopy. Void formation is closely related with M6C and G-phase precipitates and concomitant phosphide dissolution beyond the fast neutron fluence of 15x1026 n/m2. Such phase instability in the fuel pin cladding during the fast reactor operation is caused by the radiation induced solute segregation, and it mainly interpreted in terms of varying system sink strength due to dislocation and precipitate changes.

Author Information

Ukai, S
O-arai Engineering Center, Power Reactor and Nuclear Fuel Development Corporation, Ibaraki, Japan
Akasaka, N
O-arai Engineering Center, Power Reactor and Nuclear Fuel Development Corporation, Ibaraki, Japan
Hattori, K
O-arai Engineering Center, Power Reactor and Nuclear Fuel Development Corporation, Ibaraki, Japan
Onose, S
O-arai Engineering Center, Power Reactor and Nuclear Fuel Development Corporation, Ibaraki, Japan
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Details
Developed by Committee: E10
Pages: 808–821
DOI: 10.1520/STP13905S
ISBN-EB: 978-0-8031-5395-0
ISBN-13: 978-0-8031-2614-5