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Title: Modeling the influence of bubble pressure on grain boundary separation and fission gas release

Abstract

Grain boundary (GB) separation as a mechanism for fission gas release (FGR), complementary to gas bubble interlinkage, has been experimentally observed in irradiated light water reactor fuel. However there has been limited effort to develop physics-based models incorporating this mechanism for the analysis of FGR. In this work, a computational study is carried out to investigate GB separation in UO2 fuel under the effect of gas bubble pressure and hydrostatic stress. A non-dimensional stress intensity factor formula is obtained through 2D axisymmetric analyses considering lenticular bubbles and Mode-I crack growth. The obtained functional form can be used in higher length-scale models to estimate the contribution of GB separation to FGR.

Authors:
; ;
Publication Date:
Research Org.:
Idaho National Laboratory (INL)
Sponsoring Org.:
DOE - NE
OSTI Identifier:
1136318
Report Number(s):
INL/JOU-13-30956
Journal ID: ISSN 0022-3115
DOE Contract Number:  
DE-AC07-05ID14517
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Nuclear Materials; Journal Volume: 452; Journal Issue: 1 - 3
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 97 MATHEMATICS AND COMPUTING; Fission Gas Bubble; Fission Gas Release; Fracture

Citation Formats

Pritam Chakraborty, Michael R. Tonks, and Giovanni Pastore. Modeling the influence of bubble pressure on grain boundary separation and fission gas release. United States: N. p., 2014. Web. doi:10.1016/j.jnucmat.2014.04.023.
Pritam Chakraborty, Michael R. Tonks, & Giovanni Pastore. Modeling the influence of bubble pressure on grain boundary separation and fission gas release. United States. doi:10.1016/j.jnucmat.2014.04.023.
Pritam Chakraborty, Michael R. Tonks, and Giovanni Pastore. Mon . "Modeling the influence of bubble pressure on grain boundary separation and fission gas release". United States. doi:10.1016/j.jnucmat.2014.04.023.
@article{osti_1136318,
title = {Modeling the influence of bubble pressure on grain boundary separation and fission gas release},
author = {Pritam Chakraborty and Michael R. Tonks and Giovanni Pastore},
abstractNote = {Grain boundary (GB) separation as a mechanism for fission gas release (FGR), complementary to gas bubble interlinkage, has been experimentally observed in irradiated light water reactor fuel. However there has been limited effort to develop physics-based models incorporating this mechanism for the analysis of FGR. In this work, a computational study is carried out to investigate GB separation in UO2 fuel under the effect of gas bubble pressure and hydrostatic stress. A non-dimensional stress intensity factor formula is obtained through 2D axisymmetric analyses considering lenticular bubbles and Mode-I crack growth. The obtained functional form can be used in higher length-scale models to estimate the contribution of GB separation to FGR.},
doi = {10.1016/j.jnucmat.2014.04.023},
journal = {Journal of Nuclear Materials},
number = 1 - 3,
volume = 452,
place = {United States},
year = {Mon Sep 01 00:00:00 EDT 2014},
month = {Mon Sep 01 00:00:00 EDT 2014}
}