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Title: Mesoscale modeling of solute precipitation and radiation damage

This report summarizes the low length scale effort during FY 2014 in developing mesoscale capabilities for microstructure evolution in reactor pressure vessels. During operation, reactor pressure vessels are subject to hardening and embrittlement caused by irradiation-induced defect accumulation and irradiation-enhanced solute precipitation. Both defect production and solute precipitation start from the atomic scale, and manifest their eventual effects as degradation in engineering-scale properties. To predict the property degradation, multiscale modeling and simulation are needed to deal with the microstructure evolution, and to link the microstructure feature to material properties. In this report, the development of mesoscale capabilities for defect accumulation and solute precipitation are summarized. Atomic-scale efforts that supply information for the mesoscale capabilities are also included.
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [1]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  2. Idaho National Lab. (INL), Idaho Falls, ID (United States); Univ. of Wisconsin, Madison, WI (United States)
Publication Date:
OSTI Identifier:
1260885
Report Number(s):
INL/EXT--15-36754
TRN: US1601564
DOE Contract Number:
AC07-05ID14517
Resource Type:
Technical Report
Research Org:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Org:
USDOE Office of Nuclear Energy (NE)
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; PRECIPITATION; PRESSURE VESSELS; SOLUTES; CRYSTAL DEFECTS; MICROSTRUCTURE; PHYSICAL RADIATION EFFECTS; TIME DEPENDENCE; IRRADIATION; COMPUTERIZED SIMULATION; EMBRITTLEMENT; RADIATION HARDENING embrittlement; microstructure; multiscale modeling; reactor pressure vessel