skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Multiscale simulation of xenon diffusion and grain boundary segregation in UO₂

Journal Article · · Journal of Nuclear Materials
 [1];  [2];  [1];  [1];  [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Idaho National Lab. (INL), Idaho Falls, ID (United States)

In light water reactor fuel, gaseous fission products segregate to grain boundaries, resulting in the nucleation and growth of large intergranular fission gas bubbles. The segregation rate is controlled by diffusion of fission gas atoms through the grains and interaction with the boundaries. Based on the mechanisms established from earlier density functional theory (DFT) and empirical potential calculations, diffusion models for xenon (Xe), uranium (U) vacancies and U interstitials in UO2 have been derived for both intrinsic (no irradiation) and irradiation conditions. Segregation of Xe to grain boundaries is described by combining the bulk diffusion model with a model for the interaction between Xe atoms and three different grain boundaries in UO2 (Σ5 tilt, Σ5 twist and a high angle random boundary), as derived from atomistic calculations. The present model does not attempt to capture nucleation or growth of fission gas bubbles at the grain boundaries. The point defect and Xe diffusion and segregation models are implemented in the MARMOT phase field code, which is used to calculate effective Xe and U diffusivities as well as to simulate Xe redistribution for a few simple microstructures.

Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1193643
Alternate ID(s):
OSTI ID: 1246596; OSTI ID: 1321752
Report Number(s):
INL/JOU-15-35649; LA-UR-14-29110; PII: S0022311515001658; TRN: US1500531
Journal Information:
Journal of Nuclear Materials, Vol. 462, Issue C; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

References (49)

Fundamental aspects of nuclear reactor fuel elements report January 1976
A Calculation on the Migration of Fission Gas in Material Exhibiting Precipitation and Re-solution of Gas Atoms Under Irradiation journal August 1969
Diffusion theory of fission gas migration in irradiated nuclear fuel UO2 journal October 1985
Fission gas release under time-varying conditions journal January 1985
Kinetics of fission product gas release during grain growth journal March 2007
FRAPCON-3: Modifications to fuel rod material properties and performance models for high-burnup application report December 1997
The diffusion coefficients of gaseous and volatile species during the irradiation of uranium dioxide journal June 1982
Gas release mechanisms in UO 2 —a critical review journal January 1980
A new fission-gas release model journal August 1983
Phase-field modeling of gas bubbles and thermal conductivity evolution in nuclear fuels journal July 2009
Phase-field simulation of void migration in a temperature gradient journal May 2010
Phase-field modeling of void migration and growth kinetics in materials under irradiation and temperature field journal December 2010
Phase-field simulation of irradiated metals journal January 2011
Phase-field simulation of irradiated metals journal January 2011
Application of phase-field modeling to irradiation effects in materials journal June 2011
An advanced model for intragranular bubble diffusivity in irradiated UO2 fuel journal May 2008
Development of the mechanistic code MFPR for modelling fission-product release from irradiated UO2 fuel journal January 2006
Mechanistic modelling of urania fuel evolution and fission product migration during irradiation and heating journal May 2007
On the theory of fission gas bubble evolution in irradiated UO2 fuel journal January 2000
MARGARET: A comprehensive code for the description of fission gas behavior journal June 2011
Mechanism for transient migration of xenon in UO2 journal April 2011
U and Xe transport in UO 2 ± x : Density functional theory calculations journal August 2011
Atomistic modeling of intrinsic and radiation-enhanced fission gas (Xe) diffusion in <mml:math altimg="si236.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">UO</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>±</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>: Implications for nuclear fuel performance modeling journal August 2014
First-principles study of noble gas impurities and defects in UO 2 journal October 2011
Pathway and energetics of xenon migration in uranium dioxide journal March 2013
Fission Gas Diffusion in Uranium Dioxide journal December 1978
Diffusion of Xe in UO2 journal January 1990
On the solution and migration of single Xe atoms in uranium dioxide – An interatomic potentials study journal October 2010
Free energy of Xe incorporation at point defects and in nanovoids and bubbles in UO 2 journal April 2012
Ab initio energetics of some fission products (Kr, I, Cs, Sr and He) in uranium dioxide journal September 2002
Ab initio modeling of the behavior of helium and xenon in actinide dioxide nuclear fuels journal June 2006
Thermodynamics of fission products in dispersion fuel designs – First-principles modeling of defect behavior in bulk and at interfaces
  • Liu, X. -Y.; Uberuaga, B. P.; Nerikar, P.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 268, Issue 19 https://doi.org/10.1016/j.nimb.2010.05.030
journal October 2010
A molecular dynamics study of radiation induced diffusion in uranium dioxide journal March 2009
Atomic diffusion mechanism of Xe in UO2 journal August 2008
First-principles theory for helium and xenon diffusion in uranium dioxide journal March 2009
Interplay of defect cluster and the stability of xenon in uranium dioxide from density functional calculations journal September 2010
Segregation of xenon to dislocations and grain boundaries in uranium dioxide journal November 2011
First-principles calculations of uranium diffusion in uranium dioxide journal July 2012
An object-oriented finite element framework for multiphysics phase field simulations journal January 2012
A coupling methodology for mesoscale-informed nuclear fuel performance codes journal October 2010
First-principles calculation and experimental study of oxygen diffusion in uranium dioxide journal January 2011
Role of di-interstitial clusters in oxygen transport in UO 2 + x from first principles journal August 2009
Stability and migration of large oxygen clusters in UO 2+ x : Density functional theory calculations journal June 2012
Effect of stoichiometry on diffusion of xenon in UO2 journal March 1972
Grain Boundaries in Uranium Dioxide: Scanning Electron Microscopy Experiments and Atomistic Simulations: Grain Boundaries in Uranium Dioxide journal January 2011
Thermodynamics of fission products in UO 2 ± x journal October 2009
The role of charge and ionic radius on fission product segregation to a model UO 2 grain boundary journal April 2013
Intrinsic electrostatic effects in nanostructured ceramics journal February 2010
Quantitative analysis of grain boundary properties in a generalized phase field model for grain growth in anisotropic systems journal July 2008

Cited By (3)

Recent trends and open questions in grain boundary segregation journal July 2018
Unit mechanisms of fission gas release: Current understanding and future needs journal June 2018
Modeling intra-granular fission gas bubble evolution and coarsening in uranium dioxide during in-pile transients journal September 2020