Crystal Plasticity Model of Reactor Pressure Vessel Embrittlement in GRIZZLY

Technical Report · Wed Jul 01 04:00:00 EDT 2015

DOI:https://doi.org/10.2172/1244616· OSTI ID:1244616

Chakraborty, Pritam ^[1]; Biner, Suleyman Bulent ^[1]; Zhang, Yongfeng ^[1]; Spencer, Benjamin Whiting ^[1]

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1. Idaho National Laboratory (INL), Idaho Falls, ID (United States)

The integrity of reactor pressure vessels (RPVs) is of utmost importance to ensure safe operation of nuclear reactors under extended lifetime. Microstructure-scale models at various length and time scales, coupled concurrently or through homogenization methods, can play a crucial role in understanding and quantifying irradiation-induced defect production, growth and their influence on mechanical behavior of RPV steels. A multi-scale approach, involving atomistic, meso- and engineering-scale models, is currently being pursued within the GRIZZLY project to understand and quantify irradiation-induced embrittlement of RPV steels. Within this framework, a dislocation-density based crystal plasticity model has been developed in GRIZZLY that captures the effect of irradiation-induced defects on the flow stress behavior and is presented in this report. The present formulation accounts for the interaction between self-interstitial loops and matrix dislocations. The model predictions have been validated with experiments and dislocation dynamics simulation.

• Research Organization: Idaho National Laboratory (INL), Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE Office of Nuclear Energy (NE)
• DOE Contract Number: AC07-05ID14517
• OSTI ID: 1244616
• Report Number(s): INL/EXT-15-35786; M3LW-15IN0704067
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
36 MATERIALS SCIENCE
COMPUTERIZED SIMULATION
CRYSTAL DEFECTS
CRYSTALS
Crystal Plasticity
DENSITY
DISLOCATIONS
EMBRITTLEMENT
FLOW STRESS
G CODES
HOMOGENIZATION METHODS
IRRADIATION
Irradiation embrittlement
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MICROSTRUCTURE
PHYSICAL RADIATION EFFECTS
PLASTICITY
PRESSURE VESSELS
REACTORS
RPV steel
STEELS