Abstract

Compared to the standard UO2–Zirconium (Zr) based system, accident tolerant nuclear fuels need to tolerate loss of active cooling in the core for a considerably longer time period while maintaining or improving the fuel performance during normal operation conditions. Advanced steels such as iron-chromium-aluminum-molybdenum (FeCrAlMo) alloys are being investigated both under normal operation conditions in high temperature water (e.g. 2880C) and under accident conditions for reaction with super-heated steam up to 14000C. Several commercial alloys were tested for resistance to corrosion under normal operation or design conditions both using immersion tests for one year and shorter term electrochemical tests. Results show that advanced steels such as Fe22Cr5Al3Mo alloys have excellent resistance to corrosion under normal operation conditions and exhibit electrochemical behavior similar to current conventional alloys in light water reactors such as stainless steels and nickel based alloys.

Keywords:
pipeline corrosion, metals & mining, materials and corrosion, high temperature water, well integrity, riser corrosion, publication division, flowline corrosion, subsurface corrosion, impedance
Subjects:
Pipelines, Flowlines and Risers, Materials and corrosion, Well Integrity, Subsurface corrosion (tubing, casing, completion equipment, conductor)
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2015. NACE International
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