Uncertainty Quantification and Management for Multi-scale Nuclear Materials Modeling

Technical Report · Wed Oct 21 00:00:00 EDT 2015

DOI:https://doi.org/10.2172/1226258· OSTI ID:1226258

McDowell, David ^[1]; Deo, Chaitanya ^[1]; Zhu, Ting ^[1]; Wang, Yan ^[1]

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1. Georgia Inst. of Technology, Atlanta, GA (United States)

Understanding and improving microstructural mechanical stability in metals and alloys is central to the development of high strength and high ductility materials for cladding and cores structures in advanced fast reactors. Design and enhancement of radiation-induced damage tolerant alloys are facilitated by better understanding the connection of various unit processes to collective responses in a multiscale model chain, including: dislocation nucleation, absorption and desorption at interfaces; vacancy production, radiation-induced segregation of Cr and Ni at defect clusters (point defect sinks) in BCC Fe-Cr ferritic/martensitic steels; investigation of interaction of interstitials and vacancies with impurities (V, Nb, Ta, Mo, W, Al, Si, P, S); time evolution of swelling (cluster growth) phenomena of irradiated materials; and energetics and kinetics of dislocation bypass of defects formed by interstitial clustering and formation of prismatic loops, informing statistical models of continuum character with regard to processes of dislocation glide, vacancy agglomeration and swelling, climb and cross slip.

• Research Organization: Georgia Institute of Technology, Atlanta, GA (United States)
• Sponsoring Organization: USDOE Office of Nuclear Energy (NE). Nuclear Energy University Programs (NEUP)
• DOE Contract Number: AC07-05ID14517
• OSTI ID: 1226258
• Report Number(s): DOE/NEUP-12-3507; 12-3507; TRN: US1500875
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
22 GENERAL STUDIES OF NUCLEAR REACTORS
FERRITIC STEELS
MARTENSITIC STEELS
VACANCIES
INTERSTITIALS
DISLOCATIONS
BCC LATTICES
FAST REACTORS
SWELLING
REACTOR CORES
DUCTILITY
STATISTICAL MODELS
ABSORPTION
POINT DEFECTS
DESORPTION
MANAGEMENT
AGGLOMERATION
PHYSICAL RADIATION EFFECTS
DESIGN
TIME DEPENDENCE
IMPURITIES
INTERFACES
IRRADIATION
KINETICS
MICROSTRUCTURE
NUCLEATION
SEGREGATION
SINKS
SLIP
STABILITY
FUEL CANS