|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Computational Thermodynamics and Kinetics
||Surface Stability of Austenitic Stainless Steel Alloys under Pressurized Water Reactor (PWR) Conditions
||Zsolt Rak, Donald W Brenner
|On-Site Speaker (Planned)
Corrosion of steam generator tubes and reactor vessel in a PWRs are the main sources of corrosion products that deposit on fuel rods. The materials used in PWRs for reactor vessels and steam generator tubes are stainless steel alloys (304, 308, 309, and 316 in the SAE steel grades system) and nickel-chromium superalloys (INCONEL 600, 690, and 800). Using ab initio atomistic modeling that takes into account the chemical and magnetic disorder of the random alloys, the stability of low index surfaces is established. The role of magnetic frustration on Cr and Ni surface segregation of is discussed. Ab initio results are combined with experimental thermodynamic data to evaluate the stability of alloy surfaces under conditions of operating PWR (i. e. as a function of temperature, pressure and pH). The initial stages of oxidation and its effect on surface stability are evaluated.
||Planned: Supplemental Proceedings volume